C语言实现学生信息管理系统（文件版）_C/C++

本文实例为大家分享了C语言实现学生信息管理系统的具体代码，供大家参考，具体内容如下
下面是我自己用写的学生信息管理系统，为了增加数据的利用率，分为学生端和教师端，同时实现账号密码登录，以文件的形式将其存入。
代码如下
				?

									#include <stdio.h>

									#include <string.h> 

									#include <string>

									#include<Windows.h>

									#define USER "TOM"  // 事先定义用户名，用于登录页面，验证身份。 

									#define PW "123456789" // 事先定义密码 ，作用同上。

									void Level_menu();//主菜单的声明--选择学生端还是老师端。

									void Level_2_menu(); //二级菜单——具体功能分化 

									void Student_add_Level_3_menu();// 增添学生信息菜单功能分化 

									void Student_Insert(); //添加单个学生信息 

									void Student_Insert1(); /*为上面批量输入设置的函数，其代码与上面的

									         单个输入相似，删减了一部分*/

									void Student_Tongji_menu();//统计菜单部分

									void Student_Tongji_menu2();//统计二级菜单 

									void Student_Tongji_menu3();//统计 

									void IO_ReadInfo();/*将学生信息从文件（student database.txt）中读出*/

									void IO_WriteInfo();/*将学生信息写入文件（Database.txt）*/

									void student_Delete_menu(); /*删除学生信息菜单*/

									void student_menu1();/*学生查询课程信息菜单*/

									void student_Kecheng_menu2();

									void Student_From_high_to_low1(); /*按综合测评从高到低排序*/

									void jiangxue_menu();/*奖学金评定办法*/

									void Student_Display2();/*显示学生信息2在奖学金评定时使用*/

									/*定义学生结构体*/

									struct Student 

									{

									  char ID[20];  //学号

									  char Name[20];  //姓名 

									  char sushe[6];  //宿舍房间号 

									 float mathA1;  //高等数学成绩 

									 float EnglishA1; //大学英语成绩 

									 float software;  //软件技术导论

									 float china_history;//中国近代史纲要

									 float junshi;  //军事教育

									 float xinli;  //心理健康辅导

									 float sports;  //体育*/ 

									  float C_Mark;  //C语言程学设计成绩

									  float pingjun;  //总学分

									 float Banzhuren; //班主任评分

									 float Cepingfen; //测评分 

									};

									/*声明学生数组及学生数量*/

									struct Student students[1000]; 

									int num=0;

									int Num; 

									/*通过学号返回数组下标*/

									int Student_SearchByIndex(char id[]) 

									{

									 int i; 

									 for (i=0;i<num;i++) 

									 {

									  if (strcmp(students[i].ID,id)==0) 

									  {

									   return i; 

									  } 

									 } 

									 return -1; 

									}

									/*通过姓名返回数组下标*/

									int Student_SearchByName(char name[]) 

									{

									 int i; 

									 for (i=0;i<num;i++) 

									 { 

									  if (strcmp(students[i].Name,name)==0)

									  { 

									   return i;

									  } 

									 } 

									 return -1; 

									} 

									/*通过宿舍成员返回数组下标*/

									void Student_SearchBySushe()

									{

									 system("cls");

									 system("color f0");

									 int i;

									 char Sushe[6] ;

									 printf("请输入你想要查询的宿舍房间号： ");

									 scanf("%s",&Sushe); 

									 printf("%10s%10s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号","高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","总学分","班主任评分","测评分"); 

									 printf("------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (i=0;i<num;i++) 

									 { 

									  if (strcmp(students[i].sushe,Sushe)==0)

									  { 

									   printf("%10s%10s%5s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[i].ID,students[i].Name,students[i].sushe,students[i].mathA1,students[i].EnglishA1,students[i].software,students[i].china_history,students[i].junshi,students[i].xinli,students[i].sports,students[i].C_Mark,students[i].pingjun,students[i].Banzhuren,students[i].Cepingfen); 

									  }

									 } 

									 printf("数据加载完毕！"); 

									 Student_Tongji_menu2();

									} 

									/*显示单条学生记录*/

									void Student_DisplaySingle(int index) 

									{

									 printf("%10s%10s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号","高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分"); 

									 printf("------------------------------------------------------------------------------------------------------------------------\n"); 

									 printf("%10s%10s%5s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[index].ID,students[index].Name,students[index].sushe,students[index].mathA1,students[index].EnglishA1,students[index].software,students[index].china_history,students[index].junshi,students[index].xinli,students[index].sports,students[index].C_Mark,students[index].pingjun); 

									} 

									/*增加单条学生记录*/

									void Student_Insert() 

									{ 

									 system("cls");

									 system("color f0");

									 float a1,a2,a3,a4,a5,a6,a7,a8;

									 float j=0; 

									 while(1) 

									 { 

									  printf("请输入学号:");

									  scanf("%s",&students[num].ID); 

									  getchar();

									  printf("请输入姓名:"); 

									  scanf("%s",&students[num].Name); 

									  getchar();

									 printf("请输入宿舍号:"); 

									  scanf("%s",&students[num].sushe); 

									  getchar();

									 printf("请输入高等数学成绩:"); 

									  scanf("%f",&students[num].mathA1); 

									  getchar();

									  if (59<students[num].mathA1 && students[num].mathA1<100) 

									   a8= 1.5;  

									  else

									   a8=0;

									 printf("请输入大学英语成绩:"); 

									  scanf("%f",&students[num].EnglishA1); 

									  getchar();

									  if (59<students[num].EnglishA1 && students[num].EnglishA1<100) 

									   a1= 2;  

									   else

									   a1=0;

									 printf("请输入软件技术导论成绩:"); 

									  scanf("%f",&students[num].software); 

									  getchar();

									  if (59<students[num].software && students[num].software<100) 

									   a2= 1.5;  

									   else

									   a2=0;

									 printf("请输入中国近代史纲要成绩:"); 

									  scanf("%f",&students[num].china_history); 

									  getchar();

									  if (59<students[num].china_history && students[num].china_history<100) 

									   a3= 2.5;  

									   else

									   a3=0;

									 printf("请输入军事教育:"); 

									  scanf("%f",&students[num].junshi); 

									  getchar();

									  if (59<students[num].junshi && students[num].junshi<100) 

									   a4= 2;  

									   else

									  {

									   a4=0;

									 }

									 printf("请输入心理健康教育成绩:"); 

									  scanf("%f",&students[num].xinli); 

									  getchar();

									  if (59<students[num].xinli && students[num].xinli<100) 

									   a5= 1.5;  

									   else

									   a5=0;

									 printf("请输入体育成绩:"); 

									  scanf("%f",&students[num].sports); 

									  getchar();

									  if (59<students[num].sports && students[num].sports<100) 

									   a6= 2;  

									   else

									   a6=0;

									 printf("请输入C语言成绩:"); 

									  scanf("%f",&students[num].C_Mark); 

									  getchar();

									  if (59<students[num].C_Mark && students[num].C_Mark<100) 

									   a7= 3.5;  

									   else

									   a7=0;

									  printf("请输入班主任评分:"); 

									  scanf("%f",&students[num].Banzhuren); 

									  getchar();

									  students[num].pingjun=a1+a2+a3+a4+a5+a6+a7+a8; //总学分 

									  j=(students[num].pingjun*0.4)+(students[num].Banzhuren*0.6);

									  students[num].Cepingfen=j;

									  num++;

									  printf("是否继续?(Y/N)，继续请按任意键，否则输入N:"); 

									  if (getchar()=='N') 

									  { 

									   Num=num;

									   break;

									  } 

									  } 

									}  

									 /*批量添加学生记录*/

									void Student_many1()

									{

									 { 

									  system("cls");

									  system("color f0");

									  int i,j;

									  printf("请输入你将要添加的人员数： ");

									  scanf("%d",&j); 

									 for(i=0;i<j;i++)

									 {

									 Student_Insert1();

									 }

									 printf("成员添加完毕，是否跳转至上一级菜单？\n");

									 printf("是？，请按任意键，确认输入: \n"); 

									  if (getchar()=='Y') 

									  { 

									   Student_add_Level_3_menu(); 

									  } 

									 }

									 } 

									/*为上面批量输入设置的函数，其代码与上面的

									单个输入相似，删减了一部分*/

									void Student_Insert1() 

									{ 

									 {

									  printf("请输入学号:"); 

									  scanf("%s",&students[num].ID); 

									  getchar(); 

									  printf("请输入姓名:"); 

									  scanf("%s",&students[num].Name); 

									  getchar();

									 printf("请输入宿舍号:"); 

									  scanf("%s",&students[num].sushe); 

									  getchar();

									 printf("请输入高等数学成绩:"); 

									  scanf("%f",&students[num].mathA1); 

									  getchar();

									 printf("请输入大学英语成绩:"); 

									  scanf("%f",&students[num].EnglishA1); 

									  getchar();

									 printf("请输入软件技术导论成绩:"); 

									  scanf("%f",&students[num].software); 

									  getchar();

									 printf("请输入中国近代史纲要成绩:"); 

									  scanf("%f",&students[num].china_history); 

									  getchar();

									 printf("请输入军事教育:"); 

									  scanf("%f",&students[num].junshi); 

									  getchar();

									 printf("请输入心理健康教育成绩:"); 

									  scanf("%f",&students[num].xinli); 

									  getchar();

									 printf("请输入体育成绩:"); 

									  scanf("%f",&students[num].sports); 

									  getchar();

									 printf("请输入C语言成绩:"); 

									  scanf("%f",&students[num].C_Mark); 

									  getchar();

									  printf("请输入班主任评分:"); 

									  scanf("%f",&students[num].Banzhuren); 

									  getchar();

									  if (54<students[num].C_Mark && students[num].C_Mark< 60) //把55~59分之间的成绩都加上5分

									  {

									   students[num].C_Mark += 5;  

									  }

									  num++;

									  } 

									} 

									/*修改学生信息*/

									void Student_Modify() 

									{ 

									 system("cls");

									 system("color f0");

									 float a1,a2,a3,a4,a5,a6,a7,a8;

									 float j=0; 

									 while(1) 

									 { 

									  char id[20]; 

									  int index; 

									  printf("请输入要修改的学生的学号:"); 

									  scanf("%s",&id); 

									  getchar(); 

									  index=Student_SearchByIndex(id); 

									  if (index==-1) 

									  { 

									   printf("该学生不存在!\n"); 

									   }

									  else

									  { 

									   printf("你要修改的学生信息为:\n"); 

									   Student_DisplaySingle(index); 

									   printf("-- 请输入新值--\n"); 

									   /*printf("请输入学号:"); 

									   scanf("%s",&students[index].ID); 

									   getchar(); 

									   printf("请输入姓名:"); 

									   scanf("%s",&students[index].Name); 

									   getchar(); 

									 printf("请输入宿舍号:"); 

									   scanf("%s",&students[index].sushe); 

									   getchar();

									  printf("请输入高等数学成绩:"); 

									   scanf("%f",&students[index].mathA1); 

									   getchar();

									  printf("请输入大学英语成绩:"); 

									   scanf("%f",&students[index].EnglishA1); 

									   getchar();

									  printf("请输入软件技术导论成绩:"); 

									   scanf("%f",&students[index].software); 

									   getchar();

									  printf("请输入中国近代史纲要成绩:"); 

									   scanf("%f",&students[index].china_history); 

									   getchar();

									  printf("请输入军事教育:"); 

									   scanf("%f",&students[index].junshi); 

									   getchar();

									  printf("请输入心理健康教育成绩:"); 

									   scanf("%f",&students[index].xinli); 

									   getchar();

									  printf("请输入体育成绩:"); 

									   scanf("%f",&students[index].sports); 

									   getchar();

									   printf("请输入C语言成绩:"); 

									   scanf("%f",&students[index].C_Mark); 

									   getchar();

									 printf("请输入班主任评分:"); 

									   scanf("%f",&students[num].Banzhuren); 

									   getchar();*/

									 printf("请输入学号:");

									  scanf("%s",&students[index].ID); 

									  getchar();

									  printf("请输入姓名:"); 

									  scanf("%s",&students[index].Name); 

									  getchar();

									 printf("请输入宿舍号:"); 

									  scanf("%s",&students[index].sushe); 

									  getchar();

									 printf("请输入高等数学成绩:"); 

									  scanf("%f",&students[index].mathA1); 

									  getchar();

									  if (59<students[index].mathA1 && students[index].mathA1<100) 

									   a8= 1.5;  

									  else

									   a8=0;

									 printf("请输入大学英语成绩:"); 

									  scanf("%f",&students[index].EnglishA1); 

									  getchar();

									  if (59<students[index].EnglishA1 && students[index].EnglishA1<100) 

									   a1= 2;  

									   else

									   a1=0;

									 printf("请输入软件技术导论成绩:"); 

									  scanf("%f",&students[index].software); 

									  getchar();

									  if (59<students[index].software && students[index].software<100) 

									   a2= 1.5;  

									   else

									   a2=0;

									 printf("请输入中国近代史纲要成绩:"); 

									  scanf("%f",&students[index].china_history); 

									  getchar();

									  if (59<students[index].china_history && students[index].china_history<100) 

									   a3= 2.5;  

									   else

									   a3=0;

									 printf("请输入军事教育:"); 

									  scanf("%f",&students[index].junshi); 

									  getchar();

									  if (59<students[index].junshi && students[index].junshi<100) 

									   a4= 2;  

									   else

									  {

									   a4=0;

									 }

									 printf("请输入心理健康教育成绩:"); 

									  scanf("%f",&students[index].xinli); 

									  getchar();

									  if (59<students[index].xinli && students[index].xinli<100) 

									   a5= 1.5;  

									   else

									   a5=0;

									 printf("请输入体育成绩:"); 

									  scanf("%f",&students[index].sports); 

									  getchar();

									  if (59<students[index].sports && students[index].sports<100) 

									   a6= 2;  

									   else

									   a6=0;

									 printf("请输入C语言成绩:"); 

									  scanf("%f",&students[index].C_Mark); 

									  getchar();

									  if (59<students[index].C_Mark && students[index].C_Mark<100) 

									   a7= 3.5;  

									   else

									   a7=0;

									  printf("请输入班主任评分:"); 

									  scanf("%f",&students[index].Banzhuren); 

									  getchar();

									  students[index].pingjun=a1+a2+a3+a4+a5+a6+a7+a8; //总学分 

									  j=(students[index].pingjun*0.4)+(students[index].Banzhuren*0.6);

									  students[index].Cepingfen=j; 

									   } 

									   printf("是否继续?(Y/N)，继续请按任意键，否则输入N:"); 

									   if (getchar()=='N') 

									   { 

									   break;

									   } 

									  } 

									} 

									/*按学号删除学生信息*/

									void Student_Delete() 

									{ 

									 system("cls");

									 system("color f0");

									 IO_ReadInfo();

									 int i; 

									 while(1) 

									 { 

									  char id[20]; 

									  int index; 

									  printf("请输入要删除的学生的学号:"); 

									  scanf("%s",&id); 

									  getchar(); 

									  index=Student_SearchByIndex(id); 

									  if (index==-1) 

									  { 

									   printf("学生不存在!\n"); 

									  } 

									  else

									  { 

									   printf("你要删除的学生信息为:\n"); 

									   Student_DisplaySingle(index); 

									   printf("%d",index);

									   printf("%d",num);

									   { 

									    for (i=index;i<num-1;i++) 

									    { 

									     students[i]=students[i+1];  //把后边的对象都向前移动 

									    }

									    num--; 

									    } 

									   printf("已删除\n");

									    IO_WriteInfo(); 

									   } 

									   printf("是否继续删除?(Y/N)，继续请按任意键，否则输入N:"); 

									   if (getchar()=='N') 

									   { 

									   break;

									   } 

									  } 

									} 

									/*按姓名删除学生信息*/

									void Student_Delete_1() 

									{ 

									 system("cls");

									 system("color f0");

									 IO_ReadInfo();

									 int i; 

									 while(1) 

									 { 

									  char name[20]; 

									  int index; 

									  printf("请输入要删除的学生的姓名: "); 

									  scanf("%s",&name); 

									  getchar(); 

									  index=Student_SearchByName(name); 

									  if (index==-1) 

									  { 

									   printf("学生不存在!\n"); 

									  } 

									  else

									  { 

									   printf("你要删除的学生信息为:\n"); 

									   Student_DisplaySingle(index); 

									   { 

									    for (i=index;i<num-1;i++) 

									    { 

									     students[i]=students[i+1];  //把后边的对象都向前移动 

									    }

									    num--; 

									    } 

									   printf("已删除\n");

									    IO_WriteInfo(); 

									   } 

									   printf("是否继续删除?(Y/N)，继续请按任意键，否则输入N:"); 

									   if (getchar()=='N') 

									   { 

									   break;

									   } 

									  } 

									} 

									/*按姓名查询*/

									void Student_Select_1() 

									{ 

									 while(1) 

									 { 

									  char name[20]; 

									  int index; 

									  printf("请输入要查询的学生的姓名:"); 

									  scanf("%s",&name); 

									  getchar(); 

									  index=Student_SearchByName(name); 

									  if (index==-1) 

									  { 

									   printf("学生不存在!\n"); 

									  } 

									  else

									  { 

									   printf("你要查询的学生信息为:\n"); 

									   Student_DisplaySingle(index); 

									  } 

									  printf("是否继续?(Y/N)，继续请按任意键，否则输入N:"); 

									  if (getchar()=='N') 

									  { 

									   break;

									  } 

									  }

									} 

									/*按学号查找*/

									void Student_Select_2() 

									{

									 while(1)

									 {

									  char ID[20];

									  int index;

									  system("cls");

									  system("color f0"); 

									  printf("请输入要查询的学生的学号:"); 

									  scanf("%s",&ID);

									 getchar();

									 index=Student_SearchByIndex(ID);

									  if (index==-1) 

									  { 

									   printf("学生不存在!\n"); 

									  } 

									  else

									  { 

									   printf("你要查询的学生信息为:\n"); 

									   Student_DisplaySingle(index); 

									  } 

									  printf("是否继续?(Y/N)，继续请按任意键，否则输入N:"); 

									  if (getchar()=='N') 

									  { 

									   break;

									  } 

									  }

									}

									void Student_Search_menu()

									{

									  int choice;

									   while(1) 

									 {

									 system("cls");

									  system("color f0");

									 printf("\t\t\t\t\t\t1. 按姓名查询学生记录\n"); 

									   printf("\t\t\t\t\t\t2. 按学号查询学生记录\n");

									   printf("\t\t\t\t\t\t3. 返回上一级菜单\n");

									 printf("\t\t\t\t\t\t4. 返回主菜单\n");

									 printf("\t\t\t\t\t\t请选择(1-4):");

									 scanf("%d",&choice); 

									   getchar();

									 switch(choice)

									 {

									  case 1:Student_Select_1();

									   break;

									  case 2:Student_Select_2();

									   break;

									  case 3:Level_2_menu();

									   break;

									 case 4:Level_menu(); 

									     break;

									 } 

									 } 

									}

									/*按C语言成绩从高到低排序*/

									void Student_From_high_to_low() 

									{ 

									 int i,j; 

									 struct Student tmp; 

									 for (i=0;i<num;i++) 

									 { 

									  for (j=1;j<num-i;j++) 

									  { 

									   if (students[j-1].C_Mark<students[j].C_Mark) 

									   { 

									    tmp=students[j-1]; 

									    students[j-1]=students[j]; 

									    students[j]=tmp; 

									   } 

									  } 

									 } 

									} 

									/*按C语言成绩从低到高排序*/

									void Student_From_low_to_high()

									{

									  int i,j; 

									 struct Student tmp; 

									 for (i=0;i<num;i++) 

									 { 

									  for (j=1;j<num-i;j++) 

									  { 

									   if (students[j-1].C_Mark>students[j].C_Mark) 

									   { 

									    tmp=students[j-1]; 

									    students[j-1]=students[j]; 

									    students[j]=tmp; 

									   } 

									  } 

									 } 

									} 

									/*按综合测评从高到低排序*/

									void Student_From_high_to_low1() 

									{ 

									 int i,j,k; 

									 struct Student tmp; 

									 for (i=0;i<num;i++) 

									 { 

									  for (j=1;j<num-i;j++) 

									  { 

									   if (students[j-1].Cepingfen<students[j].Cepingfen) 

									   { 

									    tmp=students[j-1]; 

									    students[j-1]=students[j]; 

									    students[j]=tmp; 

									   } 

									  } 

									 }

									 /*system("cls");

									 system("color f0");

									 while(1) 

									 { 

									 int k; 

									 printf("%10s%10s %8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号"," 高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分","班主任评分","测评分"); 

									 printf("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (k=0;k<num;k++) 

									 { 

									 if(59<students[k].mathA1&&students[k].mathA1<101&&59<students[k].EnglishA1&&students[k].EnglishA1<101&&59<students[k].software&&students[k].software<101&&59<students[k].china_history&&students[k].china_history<101&&59<students[k].junshi&&students[k].junshi<101&&59<students[k].xinli&&students[k].xinli<101&&59<students[k].sports&&students[k].sports<101&&59<students[k].C_Mark&&students[k].C_Mark<101); 

									  {

									 printf("%10s%10s %8s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[k].ID,students[k].Name,students[k].sushe,students[k].mathA1,students[k].EnglishA1,students[k].software,students[k].china_history,students[k].junshi,students[k].xinli,students[k].sports,students[k].C_Mark,students[k].pingjun,students[k].Banzhuren,students[k].Cepingfen); 

									  }

									 }

									  printf("数据加载完毕！");

									 jiangxue_menu(); 

									  Student_Tongji_menu3();

									 } */

									}

									/*奖学金评定办法*/

									void jiangxue_menu()

									{

									 float i=0,j=0,k=0;

									 int a,b,c;

									 i=num*0.1;

									 j=num*0.15;

									 k=num*0.2;

									 a=(int)i;

									 b=(int)j;

									 c=(int)k;

									 printf("一等奖获得人数为：%d\n",a);

									 printf("二等奖获奖人数为：%d\n",b);

									 printf("三等奖获奖人数为：%d\n",c);

									}

									//对奖学金及格的人员筛选出来 

									void jiangxue()

									{

									 system("cls");

									 system("color f0");

									 while(1) 

									 { 

									 int k; 

									 printf("%10s%10s %8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号"," 高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分","班主任评分","测评分"); 

									 printf("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (k=0;k<num;k++) 

									 { 

									 if(59<students[k].mathA1&&students[k].mathA1<101&&59<students[k].EnglishA1&&students[k].EnglishA1<101&&59<students[k].software&&students[k].software<101&&59<students[k].china_history&&students[k].china_history<101&&59<students[k].junshi&&students[k].junshi<101&&59<students[k].xinli&&students[k].xinli<101&&59<students[k].sports&&students[k].sports<101&&59<students[k].C_Mark&&students[k].C_Mark<101); 

									  {

									 printf("%10s%10s %8s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[k].ID,students[k].Name,students[k].sushe,students[k].mathA1,students[k].EnglishA1,students[k].software,students[k].china_history,students[k].junshi,students[k].xinli,students[k].sports,students[k].C_Mark,students[k].pingjun,students[k].Banzhuren,students[k].Cepingfen); 

									  }

									 }

									  printf("数据加载完毕！");

									 jiangxue_menu(); 

									  Student_Tongji_menu3();

									 }

									}

									/*显示学生信息*/

									void Student_Display() 

									{ 

									 system("cls");

									 system("color f0");

									 while(1) 

									 { 

									 int i; 

									 printf("%10s%10s %8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号"," 高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分"); 

									 printf("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (i=0;i<num;i++) 

									 { 

									 printf("%10s%10s %8s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[i].ID,students[i].Name,students[i].sushe,students[i].mathA1,students[i].EnglishA1,students[i].software,students[i].china_history,students[i].junshi,students[i].xinli,students[i].sports,students[i].C_Mark,students[i].pingjun); 

									 }

									  printf("是否继续?(Y/N)，继续请按任意键，否则输入N:"); 

									  if (getchar()=='N') 

									  { 

									   break;

									  } 

									 }

									} 

									/*显示学生信息1*/

									void Student_Display1() 

									{ 

									 system("cls");

									 system("color f0");

									 while(1) 

									 { 

									 int i; 

									 printf("%10s%10s %8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号"," 高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分","班主任评分","测评分"); 

									 printf("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (i=0;i<num;i++) 

									 { 

									 printf("%10s%10s %8s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[i].ID,students[i].Name,students[i].sushe,students[i].mathA1,students[i].EnglishA1,students[i].software,students[i].china_history,students[i].junshi,students[i].xinli,students[i].sports,students[i].C_Mark,students[i].pingjun,students[i].Banzhuren,students[i].Cepingfen); 

									 }

									  printf("数据加载完毕！"); 

									  Student_Tongji_menu3();

									 }

									} 

									/*显示学生信息2在奖学金评定时使用*/

									void Student_Display2() 

									{ 

									 system("cls");

									 system("color f0");

									 while(1) 

									 { 

									 int i; 

									 printf("%10s%10s %8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s%8s\n","学号","姓名","宿舍号"," 高等数学","大学英语","软件技术导论","中国近代史","军事教育","心理健康教育","大学体育","C语言成绩","品行分","班主任评分","测评分"); 

									 printf("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n"); 

									 for (i=0;i<num;i++) 

									 { 

									 printf("%10s%10s %8s %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f %8.2f\n",students[i].ID,students[i].Name,students[i].sushe,students[i].mathA1,students[i].EnglishA1,students[i].software,students[i].china_history,students[i].junshi,students[i].xinli,students[i].sports,students[i].C_Mark,students[i].pingjun,students[i].Banzhuren,students[i].Cepingfen); 

									 }

									  printf("数据加载完毕！");

									 jiangxue_menu(); 

									  Student_Tongji_menu3();

									 }

									} 

									/*将学生信息从文件（student database.txt）中读出*/

									void IO_ReadInfo() 

									{ 

									 FILE *fp; 

									 int i; 

									 if ((fp=fopen("student database.txt","rb"))==NULL) 

									 { 

									  printf("不能打开文件!\n"); 

									  return; 

									 }

									 if (fread(&num,sizeof(int),1,fp)!=1) 

									 { 

									  num=-1; 

									 } 

									 else

									 { 

									  for(i=0;i<num;i++) 

									  { 

									   fread(&students[i],sizeof(struct Student),1,fp); 

									  } 

									 } 

									 fclose(fp); 

									} 

									/*将学生信息写入文件（Database.txt）*/

									void IO_WriteInfo()

									{ 

									 FILE *fp; 

									 int i; 

									 if ((fp=fopen("student database.txt","wb"))==NULL) 

									 { 

									  printf("不能打开文件!\n"); 

									  return; 

									 } 

									 if (fwrite(&num,sizeof(int),1,fp)!=1) 

									 { 

									  printf("写入文件错误!\n"); 

									 } 

									 for (i=0;i<num;i++) 

									 { 

									  if (fwrite(&students[i],sizeof(struct Student),1,fp)!=1) 

									  { 

									   printf("写入文件错误!\n"); 

									  } 

									 } 

									 fclose(fp); 

									}

									 /*一级菜单*/

									 /*账号密码登录*/

									void Level_1_menu( )

									{ char account[20];

									 char password[30];

									 int i = 0;

									 int j = 3;

									 for (; i < 3; i++){

									  printf("\n\n\n\n\t\t\t\t\t\t  *主菜单*\n");

									 printf("\t\t\t\t\t\t******************\n");

									 printf("\t\t\t\t\t\t*请输入您的账号：*\n");

									 printf("\t\t\t\t\t\t******************\n");

									 printf("            请输入:"); 

									 scanf ("%s", account);

									 printf("\t\t\t\t\t\t******************\n");

									 //scanf ("%s", account);

									 printf("\t\t\t\t\t\t******************\n");

									 printf("\t\t\t\t\t\t*请输入您的密码：*\n"); 

									 printf("\t\t\t\t\t\t******************\n");

									 printf("            请输入:"); 

									 scanf ("%s", password);

									 if (strcmp(USER, account) == 0 && strcmp(PW, password) == 0){

									 printf("登录成功！\n");

									 break;

									 }

									 else{

									 j--;

									 printf("登录失败您还有%d次机会！\n", j);

									 }

									 }

									 if (i == 3){

									 printf("登录失败，退出！");

									 }

									 //system("pause");

									 system("cls");

									 system("color f0"); 

									}

									/*增加学生信息三级菜单模块*/

									void Student_add_Level_3_menu()

									 {

									  int choice;

									   while(1) 

									 {

									 system("cls");

									  system("color f0");

									  IO_ReadInfo();  //读取文件 

									 printf("\t\t\t\t\t\t1. 单个添加学生信息\n"); 

									   printf("\t\t\t\t\t\t2. 批量添加学生信息\n");

									   printf("\t\t\t\t\t\t3. 返回上一级菜单\n");

									 printf("\t\t\t\t\t\t4. 返回主菜单\n");

									 printf("\t\t\t\t\t\t请选择(1-4):");

									 scanf("%d",&choice); 

									   getchar();

									 switch(choice)

									 {

									  case 1:Student_Insert();

									   IO_WriteInfo();  //写入文件 

									   break;

									  case 2:Student_many1();

									   IO_WriteInfo();  //写入文件

									   break;

									  case 3:Level_2_menu();

									   break;

									 case 4:Level_menu(); 

									     break;

									 }

									 IO_WriteInfo();  //写入文件 

									 } 

									   //Student_Insert(); 

									 }

									  /*二级菜单*/

									  /*主菜单*/

									void Level_2_menu( )

									{

									int choice;

									 while(1) 

									 { 

									  /*二级菜单*/

									  /*主菜单*/

									 system("cls");

									  system("color f0");

									 IO_ReadInfo();  //读取文件 

									  printf("\n\t\t\t\t\t\t------ 学生成绩管理系统------\n"); 

									  printf("\t\t\t\t\t\t1. 增加学生记录\n"); 

									  printf("\t\t\t\t\t\t2. 修改学生记录\n"); 

									  printf("\t\t\t\t\t\t3. 删除学生记录\n");

									 printf("\t\t\t\t\t\t4. 查询学生记录\n"); 

									  printf("\t\t\t\t\t\t5. 统计学生记录\n"); 

									  printf("\t\t\t\t\t\t6. 退出\n"); 

									  printf("\t\t\t\t\t\t请选择(1-6):"); 

									  scanf("%d",&choice); 

									  getchar(); 

									  switch(choice) 

									  { 

									  case 1:

									   Student_add_Level_3_menu();

									   break; 

									  case 2: 

									   Student_Modify(); 

									   break; 

									  case 3: 

									   student_Delete_menu(); 

									   break; 

									  case 4: 

									   Student_Search_menu();

									   break; 

									  case 5:

									  Student_Tongji_menu();

									 break; 

									  case 6: 

									   Level_menu(); 

									   break;

									  }

									 IO_WriteInfo(); 

									 } 

									}

									/*学生端成绩查询模块*/

									void student_Delete_menu()

									{

									 int choice; 

									 while(1)

									 {

									 system("cls");

									  system("color f0");

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t************************\n");  

									  printf("\t\t\t\t\t\t* 删除学生信息菜单******\n");

									 printf("\t\t\t\t\t\t************************\n");

									  printf("\t\t\t\t\t\t*1、按姓名删除信息  *\n");

									 printf("\t\t\t\t\t\t*2、按学号删除信息  *\n");

									 printf("\t\t\t\t\t\t*3、返回上一级功能菜单 *\n");

									 printf("\t\t\t\t\t\t*4、返回主菜单   *\n");

									 printf("\t\t\t\t\t\t************************\n");

									 printf("\t\t\t\t\t\t************************\n"); 

									 printf("            请选择(1-4):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1:

									  system("cls");

									   system("color f0");

									    Student_Delete_1();

									    break;

									  case 2:

									   system("cls");

									   system("color f0");

									   Student_Delete(); 

									   break;

									  case 3:

									    Level_2_menu(); 

									    break;

									  case 4:

									    Level_menu(); 

									    break;  

									  }

									 IO_WriteInfo(); 

									 } 

									 }

									/*学生端成绩查询模块*/

									void student_menu()

									{

									 int choice; 

									 while(1)

									 {

									 system("cls");

									  system("color f0");

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t*******************\n");  

									  printf("\t\t\t\t\t\t*  学生菜单 *\n");

									 printf("\t\t\t\t\t\t*******************\n");

									  printf("\t\t\t\t\t\t*1、按姓名查询成绩*\n");

									 printf("\t\t\t\t\t\t*2、按学号查询成绩*\n");

									 printf("\t\t\t\t\t\t*3、查询课程信息 *\n");

									 printf("\t\t\t\t\t\t*4、退出   *\n");

									 printf("\t\t\t\t\t\t*******************\n");

									 printf("\t\t\t\t\t\t*******************\n"); 

									 printf("            请选择(1-3):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1:

									  system("cls");

									   system("color f0");

									    Student_Select_1();

									    break;

									  case 2:

									   Student_Select_2();

									   break;

									  case 3:

									    student_menu1();

									  break; 

									  case 4:

									    Level_menu(); 

									    break;

									  }

									 IO_WriteInfo(); 

									 } 

									 }

									void student_Kecheng_menu1()

									{ printf("\n\n\n\n\t\t\t\t\t\t************************************************\n");

									 printf("\t\t\t\t\t\t* 课程代号  课程名称  学分 必修/选修*\n");

									 printf("\t\t\t\t\t\t*B27020100 中国近现代史纲要 2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B10060111 大学英语A1   4.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B14010101 大学体育1   2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B06010111 高等数学A1   5.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08050101 软件技术导论  2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08010100 C语言程序设计  5.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08010201 C语言程序设计实训1 2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08056601 创新与指导实践1 1.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B21991100 军事教育   2.0  选修 *\n");

									 printf("\t\t\t\t\t\t**************************************************\n");

									 printf("\t\t\t\t\t\t**************************************************\n");

									 printf("\t\t\t\t\t\t1. 返回上一级菜单\n");

									 printf("\t\t\t\t\t\t2. 返回主菜单\n");

									 printf("\t\t\t\t\t\t请选择(1-2):");

									  int choice;

									 scanf("%d",&choice);

									 while(1) 

									 switch(choice)

									 {

									  case 1:student_menu1();

									   break;

									 case 2:Level_menu(); 

									     break;

									 }

									  //写入文件

									}

									void student_Kecheng_menu2()

									{ printf("\n\n\n\n\t\t\t\t\t\t************************************************\n");

									 printf("\t\t\t\t\t\t* 课程代号  课程名称  学分 必修/选修*\n");

									 printf("\t\t\t\t\t\t*B27010100 思想道德修养  3.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B10060112 大学英语A2   4.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B14010102 大学体育2   2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B06010112 高等数学A2   5.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08052200 数字逻辑设计  2.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B06050131 大学物理C1   2.5  必修 *\n");

									 printf("\t\t\t\t\t\t*B06020100 离散数学   4.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B08056601 创新与指导实践2 1.0  必修 *\n");

									 printf("\t\t\t\t\t\t*B21991100 C语言程序设计实践2 2.0  选修 *\n");

									 printf("\t\t\t\t\t\t**************************************************\n");

									 printf("\t\t\t\t\t\t**************************************************\n");

									 printf("\t\t\t\t\t\t1. 返回上一级菜单\n");

									 printf("\t\t\t\t\t\t2. 返回主菜单\n");

									 printf("\t\t\t\t\t\t请选择(1-2):");

									  int choice;

									 scanf("%d",&choice);

									 while(1) 

									 switch(choice)

									 {

									  case 1:student_menu1();

									   break;

									 case 2:Level_menu(); 

									     break;

									 }

									  //写入文件

									}

									/*学生端学生课程查询模块*/

									void student_menu1()

									{

									 int choice; 

									 while(1)

									 {

									 system("cls");

									  system("color f0");

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t*******************\n");  

									  printf("\t\t\t\t\t\t*  课程信息 *\n");

									 printf("\t\t\t\t\t\t*******************\n");

									  printf("\t\t\t\t\t\t*1、第一学期  *\n");

									 printf("\t\t\t\t\t\t*2、第二学期  *\n");

									 printf("\t\t\t\t\t\t*3、第三学期  *\n");

									 printf("\t\t\t\t\t\t*4、第四学期  *\n");

									 printf("\t\t\t\t\t\t*5、第五学期  *\n");

									 printf("\t\t\t\t\t\t*6、第六学期  *\n");

									 printf("\t\t\t\t\t\t*7、第七学期  *\n");

									 printf("\t\t\t\t\t\t*8、退出   *\n");

									 printf("\t\t\t\t\t\t*******************\n");

									 printf("\t\t\t\t\t\t*******************\n"); 

									 printf("            请选择(1-3):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1:

									  system("cls");

									   system("color f0");

									    student_Kecheng_menu1();

									    break;

									  case 2:

									   system("cls");

									   system("color f0");

									   student_Kecheng_menu2();

									   break;

									  case 3:

									    break;

									  case 4:

									    break;

									  case 5:

									    break;

									  case 6:

									    break;

									  case 7:

									    break;

									  case 8:

									    Level_menu(); 

									    break;

									  }

									 IO_WriteInfo(); 

									 } 

									 }

									/*统计菜单模块*/

									void Student_Tongji_menu()

									{

									 int choice; 

									 while(1)

									 {

									 system("cls");

									  system("color f0");

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t******************************\n");  

									  printf("\t\t\t\t\t\t*  学生统计菜单  *\n");

									 printf("\t\t\t\t\t\t******************************\n");

									  printf("\t\t\t\t\t\t*1、按C语言成绩从高到低排序 *\n");

									 printf("\t\t\t\t\t\t*2、按C语言成绩从低到高排序 *\n");

									 printf("\t\t\t\t\t\t*3、按宿舍成员进行统计  *\n");

									 printf("\t\t\t\t\t\t*4、奖学金评定    *\n"); 

									 printf("\t\t\t\t\t\t*5、返回功能菜单    *\n");

									 printf("\t\t\t\t\t\t*6、返回主菜单    *\n");

									 printf("\t\t\t\t\t\t******************************\n");

									 printf("\t\t\t\t\t\t******************************\n"); 

									 printf("            请选择(1-5):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1: 

									   Student_From_high_to_low();

									   Student_Display1();

									   break;

									  case 2:

									   Student_From_low_to_high();

									  Student_Display1();

									  break;

									 case 3:

									   Student_SearchBySushe();

									  break;

									 case 4:

									   Student_From_high_to_low1();

									  Student_Display2(); 

									    break;

									  case 5:

									   Level_2_menu( ); 

									    break;

									  case 6:

									    Level_menu(); 

									    break;

									  }

									 IO_WriteInfo(); 

									 } 

									 }

									/*统计菜单模块*/

									void Student_Tongji_menu2()

									{

									 int choice; 

									 while(1)

									 {

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t******************************\n");  

									  printf("\t\t\t\t\t\t* 你目前在学生宿舍统计页面！ *\n");

									 printf("\t\t\t\t\t\t******************************\n");

									  printf("\t\t\t\t\t\t*1、返回上一级统计菜单  *\n");

									 printf("\t\t\t\t\t\t*2、返回功能选择菜单   *\n");

									 printf("\t\t\t\t\t\t*3、返回主菜单    *\n");

									 printf("\t\t\t\t\t\t******************************\n");

									 printf("\t\t\t\t\t\t******************************\n"); 

									 printf("            请选择(1-3):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1: 

									    system("cls");

									   system("color f0");

									   Student_Tongji_menu(); 

									  case 2:

									   system("cls");

									   system("color f0");

									   Level_2_menu( );

									 case 3:

									   system("cls");

									   system("color f0");

									   Level_menu();

									  }

									 } 

									 }

									/*统计菜单模块*/

									void Student_Tongji_menu3()

									{

									 int choice; 

									 while(1)

									 {

									  IO_ReadInfo();  //读取文件

									 printf("\n\n\n\n\t\t\t\t\t\t******************************\n");  

									  printf("\t\t\t\t\t\t* 你目前按C语言成绩统计页面！*\n");

									 printf("\t\t\t\t\t\t******************************\n");

									  printf("\t\t\t\t\t\t*1、返回上一级统计菜单  *\n");

									 printf("\t\t\t\t\t\t*2、返回功能选择菜单   *\n");

									 printf("\t\t\t\t\t\t*3、返回主菜单    *\n");

									 printf("\t\t\t\t\t\t******************************\n");

									 printf("\t\t\t\t\t\t******************************\n"); 

									 printf("            请选择(1-3):"); 

									 scanf("%d",&choice);

									 switch(choice) 

									  { 

									  case 1: 

									    system("cls");

									   system("color f0");

									   Student_Tongji_menu(); 

									  case 2:

									   system("cls");

									   system("color f0");

									   Level_2_menu( );

									 case 3:

									   system("cls");

									   system("color f0");

									   Level_menu();

									  }

									 } 

									 } 

									/*第一级主菜单学生or老师的判断*/

									void Level_menu()

									{  int choice;

									  while(1)

									 { 

									 system("cls");

									  system("color f0");

									  printf("\n\n\n\n\n\n\n\t\t\t\t\t\t******************\n");

									 printf("\t\t\t\t\t\t*1、教师端  *\n");

									 printf("\t\t\t\t\t\t*2、学生端  *\n");

									 printf("\t\t\t\t\t\t*3、退出   *\n");

									 printf("\t\t\t\t\t\t******************\n");

									 printf("            请选择(1-3):"); 

									 scanf("%d",&choice);

									 switch(choice)

									 {

									  case 1:

									   system("cls");

									   system("color f0");  

									     Level_1_menu(); //一级菜单，密码登录。 

									     IO_ReadInfo();   //读取文件

									     Level_2_menu(); //二级菜单-主菜单 

									     IO_WriteInfo();

									  break;

									 case 2:

									  student_menu();

									  break; 

									 case 3:

									  exit(0); 

									     break;  

									 } 

									 } 

									 } 

									/***********主程序*********/

									main() 

									{ 

									 Level_menu();

									}