partial_sort的用法

#include <iostream>#include <algorithm>using namespace std;bool cmp(int &a,int &b){    return a>b;}int main (void){    int iArray[] = {1, 15, -235, 0, 15, 2348, -2345, 999};    for (size_t i = 0;i < sizeof (iArray) / sizeof (*iArray);i++)    {        cout << iArray[i] <<' ';    }    cout << endl;    partial_sort(iArray, iArray + 5, iArray + sizeof (iArray) / sizeof (*iArray),cmp);    for (size_t i = 0;i < sizeof (iArray) / sizeof (*iArray);i++)    {        cout << iArray[i] <<' ';    }    cout << endl;    return 0;}