冒泡排序，从小到大排列
#include <stdio.h> //包含标准库的信息 int main(void) //每个程序都从main函数的起点开始执行 { int a[5] = {991,131,452,618,530}; int len = 5; for (int i = 0; i < len-1; ++i) { for (int j = 0; j < len-1-i; ++j) { if (a[j] > a[j+1]) { int b = a[j]; a[j] = a[j+1]; a[j+1] = b; } } } for (int k = 0; k < len; ++k) printf("%d ",a[k]); putchar('\n'); return 0; }