C语言 一个例子说明结构体变量，结构体数组和结构体指针

#include<stdio.h>

struct Student
{int num;
char name[20];
float score[3];
float aver;
};

int main()
{
    void input(struct Student stu[]);
    struct Student max(struct Student stu[]);
    void print(struct Student stud);
    struct Student stu[3];
    struct Student *p=stu;
    input(p);
    print(max(p));
    getchar();
    getchar();
    return 0;
}

void input(struct Student stu[])
{
    int i;
    printf("请依次输入学生编号，姓名，三个科目成绩：\n");
    for (i=0;i<3;i++)
    {
        scanf("%d %s %f %f %f",&stu[i].num, &stu[i].name, &stu[i].score[0], &stu[i].score[1], &stu[i].score[2]);
        stu[i].aver = (stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3.0;
    }
}

struct Student max(struct Student stu[])
{
    int i,m=0;
    for (i = 0;i<3;i++)
    {
        if(stu[i].aver>stu[m].aver) m = i;
    }
    return stu[m];
}

void print(struct Student stud)
{
    printf("成绩最高的学生：\n");
    printf("学号：%d\n 姓名：%s\n 三门成绩：%5.1f,%5.1f,%5.1f\n 平均成绩：%6.2f\n",stud.num,stud.name,stud.score[0],stud.score[1],stud.score[2],stud.aver);
    getchar();
}

struct Student
{int num;
char name[20];
float score[3];
float aver;
};

struct Student stu[3];
struct Student *p=stu;