以下程序中函数f的功能是：当flag为1时，进行由小到大排序；当flag为0时，进行由大到小排序。#include ＜stdio.h＞void f(int b[],int n,int flag){int i,j,t;for(i=0;i＜n-1;i++)for(j=i+1;j＜n;j++)if(flagb[i]＞b[j]:b[i]＜b[j]){ t=b[i];b[i]=b[j];b[j]=t;}}main(){int a[10]={5,4,3,2,1,6,7,8,9,10},i;f(&a[2],5,0);f(a,5,1);for(i=0;i＜10;i++)printf( %d, ,a[i]);}程序运行后的输出结果是______。
A．1,2,3,4,5,6,7,8,9,10,
B．3,4,5,6,7,2,1,8,9,10,
C．5,4,3,2,1,6,7,8,9,10,
D．10,9,8,7,6,5,4,3,2,1,