#include
     
      struct student{    char name[20];    char num[20];    char porject[20];    double grade;};void main(){    int i;student str[3];    for(i=0;i<3;i++)    {        printf("第%d个学生的信息是:\n",i+1);        printf("姓名:");scanf("%s",str[i].name);        printf("学号:");scanf("%s",str[i].num);        printf("系别:");scanf("%s",str[i].porject);        printf("成绩:");scanf("%lf",&str[i].grade);    }    for(i=0;i<3;i++)    {        printf("第%d个学生的信息是:\n",i+1);        printf("姓名:%s\n",str[i].name);        printf("学号:%s\n",str[i].num);        printf("系别:%s\n",str[i].porject);        printf("成绩:%lf\n",str[i].grade);    }}
     

#include
     
      struct student {    char sno[10];    char sname[20];    int age;};int main(){    student class3[31];    int i=0,j;    FILE *fp=fopen("d:\\input.txt","r");    while(!feof(fp))return 0;    }