菜鸟想问问，是先执行循环体再判断if，还是边循环边判断?（下面是老师上课讲的排序改进后更高效方案）#include<stdio.h> int main() {int i,j,a[6]={5,4,7,6,2,3},t,p; for(i=0;i<=4;i++) {p=i;for(j=i+1;j<=5;j++)if(a[p]>a[j])p=j; if(p!=i){t=a[i];a[i]=a[p];a[p]=t;}} for(i=0;i<6;i++) printf("%d ",a[i]); return 0; }