c语言第12次作业

#include<stdio.h>
struct student
{
    char name[];
    char num[];
    char porject[];
    double grade;
};

void main()
{
    int i;student str[];
    for(i=;i<;i++)
    {
        printf("第%d个学生的信息是:\n",i+);
        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=;i<;i++)
    {
        printf("第%d个学生的信息是:\n",i+);
        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<stdio.h>
struct student
{
    char sno[];
    char sname[];
    int age;
};
int main()
{
    student class3[];
    int i=,j;
    FILE *fp=fopen("d:\\input.txt","r");
    while(!feof(fp))
return ;
}