#include<stdio.h>
#include<windows.h>
#include<malloc.h>

#define MAXSIZE 100
#define ElemType student



typedef struct{           //定义结构体
    char sno[9];
    char name[9];
    char sex;
    char major[20];
}student;

typedef struct{
    ElemType * elem;
    int length;
}Sqlist;


int Insert(Sqlist * L)
{ L->elem=(ElemType *)malloc(MAXSIZE*sizeof(ElemType));
  if(L->length==0)
      return (-1);
  else
      L->length=0;
   return (1);
}

int show_list(Sqlist * L)
{   
    int i;
    if(L->length==0)
    {    printf("列表为空,请输入数据"); }
    else
    {   
        for(i=0;i<L->length-1;i++)
        {
        printf("学号：%s,姓名：%s,性别：%s,专业：%s",L->elem[i].sno,L->elem[i].name,L->elem[i].sex,L->elem[i].major);
        }
    }
    return 1;
}

int Deletelist(Sqlist * L,int pos)
{
   int i;
  if(pos<1||pos>L->length)
      return (-1);
  for(i=0;i<L->length;i++)
    L->elem[i-1]=L->elem[i];
   --(L->length);
   return 1;
}


int Initlist(Sqlist * L,int pos, ElemType val)

{
    int i;
    if(L->length==MAXSIZE)
    return (-1);
  if(pos<1||pos>L->length)
      return (-1);
  for(i=L->length-1;i<pos-1;i--)
  { L->elem[i]=L->elem[i-1];
    L->elem[pos-1]=val;
  }
   (L->length)++;
   return (1);
}

int menu_select()
{
    char c;
    do{
        system("cls");
        printf("\n ***********学生信息管理系统*****************");
        printf("\n ***        1、浏览学生信息               ***");
        printf("\n ***        2、增加学生信息               ***");
        printf("\n ***        3、查找学生信息               ***");
        printf("\n ***        4、统计学生信息               ***");
        printf("\n ***        5、插入学生信息               ***");
        printf("\n ***        6、删除学生信息              ***");
        printf("\n ***        0、退出系统                   ***");
        printf("\n*********************************************\n");
        c=getchar();
    }while(c<'0'||c>'6');
    return(c-'0');
}
void main()
{
  int n=0;
  Sqlist var_test;
  ElemType x;
  int num;
  int i;
  int loc;
  while(1)
  {switch(menu_select())
    {
        case 1:
            printf("此功能可以实现浏览学生信息\n");
              show_list(&var_test);
              system("pause");break;
        case 2:
            printf("此功能可以实现增加学生信息\n");
              Insert(&var_test);
              system("pause");break;
        case 3:
            printf("此功能可以实现查找学生信息\n");
             system("pause");break;
        case 4:
            printf("此功能可以实现统计学生信息\n");
          system("pause");break;
        case 5:
            printf("此功能可以实现插入学生信息\n");
            printf("\n请输入要插入元素的位置(1-%d):",var_test.length+1);
            scanf("%d",&loc);
            if(loc<1||loc>var_test.length+1)
            {
                printf("位置非法");
                system("pause");
                break;
            }
            printf("\n请输入要插入元素的个数:");
            scanf("%d",&num);
            for(i=1;i<=num;i++)
            {
                printf("\n请输入第%d个元素的位置",i);
                printf("\n请输入学号:");
                scanf("%s",x.sno);
                printf("\n请输入学生姓名");
                scanf("%s",x.name);
                printf("\n请输入性别:");
                scanf("%s",&x.sex);
                printf("\n请输入专业:");
                scanf("%s",x.major);
                Initlist(&var_test,loc,x);
            }
             system("pause");break;
        case 6:
            printf("此功能可以实现删除学生信息\n");
            Deletelist(&var_test,1);
              system("pause");break;
        case 0:
            printf("谢谢使用本系统/n");
            exit(0);
    }
  }
}
 
没有任何报错情况！！！！