C语言第十二次作业

#include<stdio.h>
struct student{
    char number[10];
    char name[20];
    int age;
    char gender[5];
    char telephone[15];
    char department[20];
    int score;
}; 
int main()
{
    printf("定义结构体类型\n"); 
    return 0;
}

#include<stdio.h>
#include<stdlib.h>
struct student{
    char number[10];
    char name[20];
    int age;
}; 
int main()
{
    student class3[31];
    FILE *fp=fopen("E:\input.txt","r");
    fscanf(fp,"%s%s%d",class3[0].number,class3[0].name,&class3[0].age);
    fclose(fp);
    fp=fopen("E:\output.txt","w");
    fprintf(fp,"%s    %s    %d\n",class3[0].number,class3[0].name,class3[0].age);
    fclose(fp);    
    return 0;
}

#include<stdio.h>
struct student{
    char number[10];
    char name[20];
    int age;
}; 
void addStudent()
{
    student class3;
    int ch;
    FILE *fp=fopen("E:\student.txt","a+");
    printf("请输入学号：");
    scanf("%s",class3.number);
    printf("请输入姓名：");
    scanf("%s",class3.name);
    printf("请输入年龄：");
    scanf("%d",&class3.age);
    fprintf(fp,"%s    %s    %d\n",class3.number,class3.name,class3.age);
    printf("信息添加成功，是否继续添加学生信息(1/2)");
    scanf("%s",&ch);
    do
    {
        printf("请输入学号：");
        scanf("%s",class3.number);
        printf("请输入姓名：");
        scanf("%s",class3.name);
        printf("请输入年龄：");
        scanf("%d",&class3.age);
        fprintf(fp,"%s    %s    %d\n",class3.number,class3.name,class3.age);
        printf("信息添加成功，是否继续添加学生信息(1/2)");
        scanf("%s",&ch);
    }while(ch==1);
}
int main()
{
    printf("                    三班学生管理系统\n");
    printf("1.添加学生信息\n"); 
    printf("2.............\n");
    printf("3.............\n");
    int a;
    scanf("%d",&a);
    if(a==1)
        addStudent();     
    return 0;
}