某班有5個學生, 每名學生的數據包括學號,姓名,3門課成績,從鍵盤上輸入5名學生數據,要求打印出3門課的總平均成績以及最高分的學生數據(包括學號,姓名,3門課成績)

#define _CRT_SECURE_NO_WARNINGS        //關閉安全檢查
#include<stdio.h>
#include<stdlib.h>

//定義結構體類型
struct ST
{
    int ID;
    char name[20];
    float score[3];
};

//方法1 : 結構體數組作為函數參數 開銷大
float avg(struct ST sts[], int n)
{
    float sum = 0, avg;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            sum += sts[i].score[j];
        }
    }
    avg = sum / n / 3;
    return avg;
}

//方法2 : 結構體數組指針作為函數參數 開銷小
float avg1(struct ST *p, int n)
{
    float sum = 0, avg;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            sum += p[i].score[j];
        }
    }
    avg = sum / n / 3;
    return avg;
}

//輸出最高分數學生信息
void high(struct ST *p, int n)
{
    int index = 0;
    float max = 0, sum = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            sum = p[i].score[0] + p[i].score[1] + p[i].score[2];
            if (sum > max)
            {
                max = sum;
                index = i;
            }
        }
    }
    printf("最高學生信息為:\n");
    //(p+index)->ID 等價於 p[index].ID
    printf("學號:%d\n", (p+index)->ID);
    printf("姓名:%s\n", p[index].name);
    printf("成績:%.2f, %.2f, %.2f\n", p[index].score[0], p[index].score[1], p[index].score[2]);
}

int main()
{
    int i, j;
    struct ST sts[5];
    for (i = 0; i < 5; i++)
    {
        printf("請輸入第%d個學生信息\n", i+1);
        scanf("%d", &sts[i].ID);
        //加不加&都可以
        scanf("%s", sts[i].name);
        printf("輸入各科成績\n");
        for (j = 0; j < 3; j++)
        {
            scanf("%f", &sts[i].score[j]);
        }
    }

    printf("平均成績為:%f\n", avg1(sts, 5));
    high(sts, 5);
    system("pause");
    return 0;
}