#include <stdio.h> #include <string.h> #define MAX_STUDENT_NUM 30 // #define MAX_COURSE_NUM 6 // #define NAME_LEN 20 // struct Student { char id[10];//学生学号 char name[NAME_LEN];//姓名 int scores[MAX_COURSE_NUM];//各科分数 int total_score;//总分 float avg_score;//平均分 }; void calc_total_avg_student(struct Student students[], int num, int course_num);//计算每个学生的总分和平均分 void sort_by_total_score(struct Student students[], int num);//按每个学生的总分由高到低排出名次表 void sort_by_number(struct Student students[], int num);//按学号由小到大排出成绩表 请用c语言分别补充函数内容

补充calc_total_avg_student函数内容：

void calc_total_avg_student(struct Student students[], int num, int course_num)
{
    for (int i = 0; i < num; i++)
    {
        int total_score = 0;
        for (int j = 0; j < course_num; j++)
        {
            total_score += students[i].scores[j];
        }
        students[i].total_score = total_score;
        students[i].avg_score = (float)total_score/course_num;
    }
}

补充sort_by_total_score函数内容：

void sort_by_total_score(struct Student students[], int num)
{
    for (int i = 0; i < num-1; i++)
    {
        for (int j = 0; j < num-i-1; j++)
        {
            if (students[j].total_score < students[j+1].total_score)
            {
                struct Student temp = students[j];
                students[j] = students[j+1];
                students[j+1] = temp;
            }
        }
    }
}

补充sort_by_number函数内容：

void sort_by_number(struct Student students[], int num)
{
    for (int i = 0; i < num-1; i++)
    {
        for (int j = 0; j < num-i-1; j++)
        {
            if (strcmp(students[j].id, students[j+1].id) > 0)
            {
                struct Student temp = students[j];
                students[j] = students[j+1];
                students[j+1] = temp;
            }
        }
    }
}

注：这里假设MAX_COURSE_NUM为6，NAME_LEN为20。