从键盘输入某班学生某门课的成绩（每班人数最多不超过40人），当输入为负值时，表示输入结束，试编程将分数按从高到低顺序进行排序输出。

排序功能需要自定义函数实现。

**输入格式要求："%d" 
**输入提示信息："Input score:" "Total students are %d\n" "Sorted scores:" 
**输出格式要求："%4d"
程序的运行示例如下：
Input score:84
Input score:83 
Input score:88
Input score:87
Input score:61
Input score:-1
Total students are 5
Sorted scores:  88  87  84  83  61

#include<stdio.h>
#define N 40

void Sort(int score[],int students)
{
    int temp;
    for(int i = 0; i < students; i++)
    {
        for(int j = i + 1; j < students; j++)
        {
             if(score[j] > score[i])
            {
                temp = score[j];
                score[j] = score[i];
                score[i] = temp;
            }
        }
    }
    for(int j = 0; j < students; j++)
    {
        printf("%4d", score[j]);
    }

}

int main()
{
    int score[N];
    int i = -1;
    int students = -1;
    do{
        i++;
        printf("Input score:");
        scanf("%d", &score[i]);
        students++;
    }while(score[i] > 0);
    printf("Total students are %d\n", students);
    printf("Sorted scores:");
    Sort(score, students);
    return 0;
}