虽然很简单，但是用了一下copy 和ostream_iterator
#include<iostream>
#include<algorithm>
#include<iterator>
int main()
{
int a[3];
std::cin>>a[0]>>a[1]>>a[2];
std::sort(a,a+3);
std::copy(a,a+3,std::ostream_iterator<int>(std::cout," "));
}
原文：http://blog.csdn.net/u012134276/article/details/23599327