冒泡排序：小泡

#include "stdafx.h"#include "stdio.h"#include "stdlib.h"#include "time.h"void bubblesort_big_first(int a[],int len);int main(int argc, char* argv[]){int a[20];int i;srand(time(NULL));for(i=0;i<20;i++)a[i] = rand()%100;printf("before sort:\n");for(i=0;i<20;i++)printf("%d\t",a[i]);printf("\n");printf("big_first sorting...\n");bubblesort_big_first(a,sizeof(a)/sizeof(a[0]));printf("after sort:\n");for(i=0;i<20;i++)printf("%d\t",a[i]);printf("\n");return 0;}void bubblesort_big_first(int a[],int len){int i,j;for(i=0;i<len-1;i++)for(j=0;j<len-i-1;j++){if(a[j] < a[j+1]){a[j] += a[j+1];a[j+1] = a[j] - a[j+1];a[j] = a[j] - a[j+1];}}}