#include<stdio.h>
struct student
{
    int number;
    char name[20];
    char sex;
    int age;
    char address;
    int phone;
}
int main(void)
{
    int len;
    int i;
    scanf("%d",&len);
    printf("请输入班级人数:\n");
    struct student stu[i];
    for (i=1;i<len;i++)
    scanf("%d %c %c %d %c %d",&stu_1[i].number,&stu_2[i].name[20],&stu_3[i].sex,&stu_4[i].age,&stu_5[i].address,&stu_6[i].phone);
    printf("请输入班级学生信息：\n");
    for (i=1;i<len;i++);
    printf("%d %c %c %d %c %d",stu_1[i].number,stu_2[i].name[20],stu_3[i].sex,stu_4[i].age,stu_5[i].address,&stu_6[i].phone);
    return(0);

}

#include<stdio.h>
struct student
{
    int number;
    char name[20];
    char sex;
    int age;
    char address;
    int phone;
}
 main()
{
    int i;
    struct student stu[42];
    for (i=1;i<42;i++)
    scanf("%d %c %c %d %c %d",&stu[i].number,stu[i].name[20],&stu[i].sex,&stu[i].age,&stu[i].address,&stu[i].phone);
    for (i=1;i<42;i++);
    printf("%d %c %c %d %c %d",stu[i].number,stu[i].name[20],stu[i].sex,stu[i].age,stu[i].address,&stu[i].phone);
}

看这个对不对啊

#include<stdio.h>
struct student
{
    int number;
    char name[20];
    char sex;
    int age;
    char address;
    int phone;
}
 main()
{
    int i;
    struct student stu[42];
    for (i=1;i<42;i++)
    scanf("%d %c %c %d %c %d",&stu[i].number,stu[i].name[20],&stu[i].sex,&stu[i].age,&stu[i].address,&stu[i].phone);
    for (i=1;i<42;i++);
    printf("%d %c %c %d %c %d",stu[i].number,stu[i].name[20],stu[i].sex,stu[i].age,stu[i].address,&stu[i].phone);
}

看这个对不对

嗯嗯，看这个对不对#include<stdio.h>
struct student
{
    int number;
    char name[20];
    char sex;
    int age;
    char address;
    int phone;
}
 main()
{
    int i;
    struct student stu[42];
    for (i=1;i<42;i++)
    scanf("%d %c %c %d %c %d",&stu[i].number,stu[i].name[20],&stu[i].sex,&stu[i].age,&stu[i].address,&stu[i].phone);
    for (i=1;i<42;i++);
    printf("%d %c %c %d %c %d",stu[i].number,stu[i].name[20],stu[i].sex,stu[i].age,stu[i].address,&stu[i].phone);
}

嗯嗯，谢了啊