C有一个班4个学生,5门课程。1求第1门课程的平均分;找出有两门以上课程不及格的学生,输出他们的学号和全部课程成绩及平均成绩;3找出平均成绩在90分以上或全部课程成绩在85分以上的学生。分别编3个函数

以下是对应的三个函数实现：

1. 求第1门课程的平均分

#include<stdio.h>

float avgScoreOfCourse(int (*scores)[5], int courseNum, int studentNum) {
    float sum = 0;
    for (int i = 0; i < studentNum; i++) {
        sum += scores[i][courseNum];
    }
    return sum / studentNum;
}

int main() {
    int scores[4][5] = {{90, 85, 95, 80, 88},
                        {75, 92, 88, 78, 85},
                        {87, 90, 92, 91, 89},
                        {62, 70, 50, 68, 63}};
    float avgScore = avgScoreOfCourse(scores, 0, 4);
    printf("The average score of course 1 is: %.2f\n", avgScore);
    return 0;
}

2. 找出有两门以上课程不及格的学生, 输出他们的学号和全部课程成绩及平均成绩

#include<stdio.h>

void findFailedStudents(int (*scores)[5], int studentNum) {
    for (int i = 0; i < studentNum; i++) {
        int failedCount = 0;
        for (int j = 0; j < 5; j++) {
            if (scores[i][j] < 60) {
                failedCount++;
            }
        }
        if (failedCount >= 2) {
            float sum = 0;
            printf("Student %d's scores: ", i+1);
            for (int j = 0; j < 5; j++) {
                printf("%d ", scores[i][j]);
                sum += scores[i][j];
            }
            printf("Average score: %.2f\n", sum / 5);
        }
    }
}

int main() {
    int scores[4][5] = {{90, 85, 95, 80, 88},
                        {75, 92, 88, 78, 85},
                        {87, 90, 92, 91, 89},
                        {62, 70, 50, 68, 63}};
    findFailedStudents(scores, 4);
    return 0;
}

3. 找出平均成绩在90分以上或全部课程成绩在85分以上的学生

#include<stdio.h>

void findExcellentStudents(int (*scores)[5], int studentNum) {
    for (int i = 0; i < studentNum; i++) {
        float sum = 0;
        int excellentCount = 0;
        for (int j = 0; j < 5; j++) {
            sum += scores[i][j];
            if (scores[i][j] >= 85) {
                excellentCount++;
            }
        }
        if (sum / 5 >= 90 || excellentCount == 5) {
            printf("Student %d is excellent!\n", i+1);
        }
    }
}

int main() {
    int scores[4][5] = {{90, 85, 95, 80, 88},
                        {75, 92, 88, 78, 85},
                        {87, 90, 92, 91, 89},
                        {62, 70, 50, 68, 63}};
    findExcellentStudents(scores, 4);
    return 0;
}