5.关系仿函数

#include<iostream>
using namespace std;

#include<vector>
#include<functional>
#include<algorithm>

//仿函数原型
//template<class T> bool equal_to<T>//等于   
//template<class T> bool not_equal_to<T>不等于
//template<class T> bool greater<T>大于
//template<class T> bool greater_equal<T>大于于等于
//template<class T> bool less<T> 小于
//template<class T> bool less_equal<T>小于等于

void test0501()
{
    vector<int> v;
    v.push_back(10);
    v.push_back(130);
    v.push_back(140);
    v.push_back(1);
    v.push_back(130);

    for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << (*it) << " ";
    }
    cout << endl;

    sort(v.begin(), v.end(), greater<int>());//通过内建仿函数创建的匿名对象指定排序规则
    for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << (*it) << " ";
    }
    cout << endl;

    greater<int> g;
    cout << g(1, 2) << endl;
}
int main()
{
    test0501();

    system("pause");
    return 0;
}