文档介绍:#include <>
#include <>
#include <>
#define MUNMAX 2
struct studentInfo{    //结构类型定义
int num;
int cls;
char* name;
    int score[10];
};
struct stuType{ //结构类型定义
   studentInfo stu[MUNMAX];
   int num;
};
void DisplayMenu();
int choiceItem();
void Init(struct stuType*);
void PrintInfo(struct stuType);
void Print_aInfo(struct stuType,int);
void Input_aInfo(struct studentInfo*);
void Input_allInfo(struct stuType*,int num);
int Search(struct stuType);
void Modify(struct stuType*,stuType);
void del(struct stuType*);
void Search_cls(struct stuType*);
void main()
{
struct stuType student;
int choice,index;
Init(&student);
do{
choice=choiceItem();
switch (choice){
    case 0:printf("\e to");break;
    case 1:Input_allInfo(&student,MUNMAX);break;
    case 2:Input_allInfo(&student,1); break;
    case 3:PrintInfo(student);break;
    case 4:Init(&student);break;
    case 5:if ((index=Search(student))!=-1)
     Print_aInfo(student,index);
   else printf("\n No eixst the student.");
   break;
    case 6:Modify(&student,student);break;
        case 7:del(&student);break;
case 8:Search_cls(&student);break;
}
       }while(choice);
}
void DisplayMenu()   //显示菜单
{
   printf("\n========= MENU =========");
   printf("\n Input more student's informations ......... 1");
   printf("\n Input a student's informations ............