C语言程序：录入五门课程成绩并计算平均成绩及排序

#include <stdio.h>

int main() {
    float scores[5];
    float sum = 0;
    float avg = 0;
    int i, j;

    // 录入成绩
    printf('请输入五门课程的成绩：\n');
    for (i = 0; i < 5; i++) {
        scanf('%f', &scores[i]);
        sum += scores[i];
    }

    // 计算平均成绩
    avg = sum / 5;
    printf('平均成绩为：%.2f\n', avg);

    // 从小到大排序
    for (i = 0; i < 4; i++) {
        for (j = i+1; j < 5; j++) {
            if (scores[i] > scores[j]) {
                float temp = scores[i];
                scores[i] = scores[j];
                scores[j] = temp;
            }
        }
    }

    // 输出排序后的成绩
    printf('成绩从小到大排序为：\n');
    for (i = 0; i < 5; i++) {
        printf('%.2f ', scores[i]);
    }

    return 0;
}