输入某班学生某门课的成绩（最多不超过40人，具体人数由用户键盘输入），用C语言编程统计不及格人数。 **输入格式要求："%d" 提示信息："How many students?" **输出格式要求："Fail students = %d\n" 程序运行示例如下： How many students?5 45 56 78 99 100 Fail students = 2

下面是代码实现：

#include <stdio.h>

int main() {
    int num, fail_count = 0;
    printf("How many students? ");
    scanf("%d", &num);
    int scores[num];
    for (int i = 0; i < num; i++) {
        scanf("%d", &scores[i]);
        if (scores[i] < 60) {
            fail_count++;
        }
    }
    printf("Fail students = %d\n", fail_count);
    return 0;
}

程序运行示例如下：

How many students? 5
45
56
78
99
100
Fail students = 2