开课水平小测（数据结构_修改版）

/* 输入10个学生5门课的成绩，分别用函数实现下列功能：

 1. 计算每个学生的平均分；
 2. 计算每门课程的平均分；
 3. 找出50个分数中的最高分。*/
#include <stdio.h>
#define N 10
#define M 5
#define Q 30

//声明结构体类型
struct STUDENT
{
    int studentID;
    float score[M];
};
//定义结构体数组
struct STUDENT stu[N];

void Student_achievement_output(struct STUDENT *s);
//输出成绩表函数原型
void each_student_average(struct STUDENT *stu_score);
//计算每个学生平均分函数原型
void each_course_average(struct STUDENT *sco_score);
//计算每门课程平均分函数原型
void MAX(struct STUDENT *Max);
//计算最高分函数原型

int main(void)
{
    printf("struct STUDENT stu[%d] Number of bytes :%d\n", N, Q*sizeof(struct STUDENT));
    //计算结构体数组所占字节数
    putchar('\n');

    //初始化结构体数组
    struct STUDENT stu[N] = {{123401, {91.27, 92.39, 93.48, 94.36, 95.97}},
                                {123402, {90.97, 91.27, 92.39, 93.48, 94.36}},
                                {123403, {99.36, 98.97, 97.27, 96.39, 95.48}},
                                {123404, {91.48, 99.36, 92.36, 98.27, 93.39}},
                                {123405, {90.39, 91.48, 92.36, 93.97, 94.27}},
                                {123406, {99.11, 98.64, 97.93, 96.01, 95.55}},
                                {123407, {90.55, 91.11, 92.64, 93.93, 94.01}},
                                {123408, {99.01, 98.55, 97.11, 96.64, 95.93}},
                                {123409, {90.93, 91.01, 92.55, 93.11, 94.64}},
                                {123410, {99.64, 98.93, 97.01, 96.55, 95.11}}};

    putchar('\n');
    Student_achievement_output(stu);//调用输出成绩表函数

    putchar('\n');
    each_student_average(stu);//调用计算每个学生的平均分函数

    putchar('\n');
    each_course_average(stu);//调用计算每门课程的平均值函数

    putchar('\n');
    MAX(stu);//调用计算最高分函数

    return 0;
}

void Student_achievement_output(struct STUDENT *s)
{
    int i=0;
    int j=0;

    //输出成绩表
    printf("studentID:\tscore_1: score_2: score_3: score_4: score_5:");
    putchar('\n');
    for(i=0; i<N; i++)
    {
        putchar('\n');
        printf("   %d ", s[i].studentID);
        putchar('\t');

        for(j=0; j<M; j++)
        {   printf("  %.1f  ", s[i].score[j]);  }
        putchar('\n');
    }
}

//计算每个学生的平均分函数定义
void each_student_average(struct STUDENT *stu_score)
{
    int i, j;
    float sum = 0;

    putchar('\n');
    for(i=0; i<M; i++)
    {
        for(j=0; j<N; j++)
        {   sum += stu_score[i].score[j];   }
        printf("学号：%d, Average score: %.1f\n", stu_score[i].studentID, sum/5.0);
        putchar('\n');
    }
}

//计算每门课程的平均分函数定义
void each_course_average(struct STUDENT *sco_score)
{
    int i, j;
    float sum = 0;

    putchar('\n');
    for(j=0; j<M; j++)
    {
        for(i=0; i<N; i++)
        {   sum += sco_score[i].score[j];   }
        printf("sccore_%d, Average value: %.1f\n", j+1, sum/10.0);
        putchar('\n');
    }
}

//计算最高分函数定义
void MAX(struct STUDENT *Max)
{
    int i, j, m1, m2;
    float max = 0;

    for(i=0; i<N; i++)
    {
        for(j=0; j<M; j++)
        {
            if(Max[i].score[j] > max)
            {
                max = Max[i].score[j];
                m1 = i;
                m2 = j+1;
            }
        }
    }

    putchar('\n');
    printf("max_score: %.3f\n", max);
    printf("studentID: %d\n", Max[m1].studentID);
    printf("score_%d\n ", m2);
    putchar('\n');
}