#include "stdio.h"
int main(void)
{
    struct student_list
    {
        char name[10];
        int num;
        char sex[2];
        int age;
    }student[10];
    int i;
    for(i=0;i<10;i++)
    {
        printf("请输入第%d个学生信息：名字与学号与性别与年龄:\n",i+1);                  
 scanf("%s%d%s%d",student[i].name,&student[i].num,student[i].sex,&student[i].age);
    }
 
        printf("十个学生的信息分别如下：\n");
       for(i=0;i<10;i++)
    {
        printf("姓名：%s\t学号：%d\t性别：%s\t年龄：%d\n",student[i].name,student[i].num,student[i].sex,student[i].age);
    }
 
return 0;
} 

#include<stdio.h>
#include<stdlib.h>
struct student
{
    char no[10];
    char name[20];
    int age;
}; 
int main()
{
    student class3[31];
    FILE *fp=fopen("c:\\input.txt","r");
    fscanf(fp,"%s%s%d",class3[0].no,class3[0].name,&class3[0].age);
    fclose(fp);
    fp=fopen("c:\\output.txt","w");
    fprintf(fp,"%s  %s  %d\n",class3[0].no,class3[0].name,class3[0].age);
    fclose(fp);    
    return 0;
}