C++STL_sort

#include<algorithm>
#include<iostream>
using namespace std;
void print(int x)
{
    cout<<x<<' ';
}
int main()
{
    int iArray[]={2,8,-15,90,26,7,23,30,-27,39,55};
    const int len=sizeof(iArray)/sizeof(int);
    cout<<"由小到时大排序"<<endl;
    sort(iArray,iArray+len);
    for_each(iArray,iArray+len,print);
    cout<<endl;
    cout<<"由大到小排序"<<endl; 
    sort(iArray,iArray+len,greater<int>());
    for_each(iArray,iArray+len,print);
    cout<<endl;
    return 0;
}