#include<vector>
#include<iostream>
#include<algorithm>
#include<functional>
using namespace std;
template <typename T>
class sum//二元函式物件
{
public:
	T operator()(T &t1, T &t2)//
	{
		return t1 + t2;
	}
};

void printFun(vector<int> &obj)
{
	for (vector<int>::iterator it = obj.begin(); it != obj.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}
void pt(int &a)
{
	cout << a << " ";
}
template <typename T>
bool Mycmp(T &t1, T &t2)
{
	if (t1 > t2) return true;
	else return false;
}
int main()
{
	vector<int> v1, v2, v3;
	for (size_t i = 0; i < 3; i++)
	{
		v1.push_back(2 * i + 1);
		v2.push_back(2 * i);
	}
	printFun(v1);
	printFun(v2);

	//transform 函式物件引數一般不是引用，必須有返回值
	//for_each  函式物件引數一般  是引用，  沒有返回值 
	//使用二元函式物件
	v3.resize(3);
	transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), sum<int>());
	for_each(v3.begin(), v3.end(), pt);
	cout << endl;

	//使用二元謂詞
	sort(v3.begin(), v3.end(), Mycmp<int>);
	for_each(v3.begin(), v3.end(), pt);
	cout << endl;

	//使用函式介面卡  bind2nd 繫結第二個引數
	v3.push_back(1);
	int num = count_if(v3.begin(), v3.end(), bind2nd(equal_to<int>(), 1));
	cout << num << endl; 
	system("pause");
	return 0;
}