C语言 利用一维数组交换法排序 使学生成绩高低排序（要求输入为负值时输入结束）

声明：该编译器为vs，所以输入函数写为scanf_s形式！

代码如下：

#include <stdio.h>#define N 40int ReadScore(int score[]);//函数原型；void DataSort(int score[], int n);//函数原型；void PrintfScore(int score[], int n);//函数原型；int main() {int score[N], n;n = ReadScore(score);printf("Total students are %d\n", n);DataSort(score,n);printf("Sorted scores:\n");PrintfScore(score, n);return 0;}//函数功能：读入该门课的成绩：int ReadScore(int score[]) {int i = -1;printf("Input score:\n");do {i++;scanf_s("%d", &score[i]);} while (score[i] >= 0);return i;}//函数功能：将该门课的成绩按照高低排序；void DataSort(int score[], int n) {int i, j,temp;for (i = 0; i < n - 1; i++) {for (j = i + 1; j < n; j++) {if (score[j] > score[i]) {temp = score[j];score[j] = score[i];score[i] = temp;}}}}//函数功能：打印该门课的成绩；void PrintfScore(int score[], int n) {int i;for (i = 0; i < n; i++) {printf("%4d", score[i]);}printf("\n");}

运行结果如下：