#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SIZE 2
struct student_type
{
    int num;
    char name[20];
    int age;
    char sex[5];
    char date[20];
    char addr[40];
    int tel;
    char email[40];
}stud[SIZE];
int i,n;
void save()
{   
    FILE *fp;
    int i;
    if ((fp=fopen("stu_list.txt","wb"))==NULL)
    {
        printf("cannot open file\n");
        return;
    }
    for(i=0;i<SIZE;i++)
        if(fwrite(&stud[i],sizeof(struct student_type),1,fp)!=1)
            printf("file write error\n");
    fclose(fp);
}
void luru()
{
    int i;
    for(i=0;i<SIZE;i++)
        {
        printf("输入学号:\n");
        scanf("%d",&stud[i].num);
        printf("输入姓名:\n");
        scanf("%s",stud[i].name);
        printf("输入年龄:\n");
        scanf("%d",&stud[i].age);
        printf("输入性别:\n");
        scanf("%s",stud[i].sex);
        printf("输入出生年月:\n");
        scanf("%s",stud[i].date);
        printf("输入家庭住址:\n");
        scanf("%s",stud[i].addr);
        printf("输入电话:\n");
        scanf("%d",&stud[i].tel);
        printf("输入电子邮箱:\n");
        scanf("%s",stud[i].email);
        }
    save();
}
void liulan()
{
    int i;
    FILE *fp;
        fp=fopen("stu_list.txt","rb");
    for(i=0;i<SIZE;i++)
    {
        fread(&stud[i],sizeof(struct student_type),1,fp);
        printf("%6d%7s%5d%5s%8s%15s%10d%15s\n",stud[i].num,stud[i].name,stud[i].age,stud[i].sex,stud[i].date,stud[i].addr,stud[i].tel,stud[i].email);
    }
    fclose(fp);
}
void anxuehao()
{
    int a;
    char c;
    unsigned b;
    FILE *fp;
        fp=fopen("stu_list.txt","rb");
    do
    {
        printf("学生学号:\n");
        scanf("%d",&b);
        for(a=0;a<SIZE;a++)
        {
            if(stud[a].num==b)
            {
                printf("%6d%7s%5d%5s%8s%15s%10d%15s\n",stud[a].num,stud[a].name,stud[a].age,stud[a].sex,stud[a].date,stud[a].addr,stud[a].tel,stud[a].email);
            }
        }
    }
    while(!c);
}
void anxingming()
{
    int m;
    char name[20];
        FILE *fp;
        fp=fopen("stu_list.txt","rb");
        printf("请输入姓名:\n");
        scanf("%s",name);
        for(m=0;m<SIZE;m++)
            if(strcmp(name,stud[m].name)==0)
            {
                printf("%6d%7s%5d%5s%8s%15s%10d%15s\n",stud[m].num,stud[m].name,stud[m].age,stud[m].sex,stud[m].date,stud[m].addr,stud[m].tel,stud[m].email);
            }
}
void shanchu()
{
    int s,j,flag=0;
    char s1;
    FILE *fp;
        fp=fopen("stu_list.txt","rb+");
    printf("请输入要删除学生的学号:\n");
    scanf("%s",s1);
    for(s=0;s<n;s++)
        if(strcmp(stud[s].num,s1)==0)
        {
            flag=1;
            for(j=s;j<n-1;j++)
                stud[j]=stud[j+1];
        }
}
void xiugai()
{
    int i,item,flag,number;
    char sex1[3],s1[20],s2[20];
        FILE *fp;
        fp=fopen("stu_list.txt","rb+");
    printf("输入要修改的学生的学号:\n");
    scanf("%s",s1);
    flag=0;
    for(i=0;i<n;i++)
        if(strcmp(stud[i].num,s1)==0)/*比较字符串是否相等*/
        {
            number=i;
            flag=1;
            printf("输入学号:\n");
            printf("输入姓名:\n");
            printf("输入年龄:\n");
            printf("输入性别:\n");
            printf("输入出生年月:\n");
            printf("输入家庭住址:\n");
            printf("输入电话:\n");
            printf("输入电子邮箱:\n");
        }
}
void main()
{
    int x;
    do
    {
        printf("1.录入\n");
        printf("2.浏览\n");
        printf("3.按学号查询\n");
        printf("4.按姓名查询\n");
        printf("5.学生信息的删除\n");
        printf("6.学生信息的修改\n");
        scanf("%d",&x);
        switch(x)  
        {
        case 1:luru();break;
        case 2:liulan();break;
        case 3:anxuehao();break;
        case 4:anxingming();break;
        case 5:shanchu();break;
        case 6:xiugai();break;
        case 7:break;
        }
    }
    while(x!=7);
}