#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include <algorithm>
#include <vector>
#include <functional>
using namespace std;/*
遍历算法 遍历容器元素
@param beg 开始迭代器
@param end 结束迭代器
@param _callback  函数回调或者函数对象
@return 函数对象
*///void myPrint(int v)
//{
//	cout << v << endl;
//}struct myPrint01
{void operator()(int v){cout << v << endl;}
};void test01()
{vector<int>v;for (int i = 0; i < 10; i++){v.push_back(i);}for_each(v.begin(), v.end(), myPrint01());
}struct myPrint02
{void operator()(int v){cout << v << endl;m_Count++;}int m_Count;
};
//2 for_each有返回值
void test02()
{vector<int>v;for (int i = 0; i < 10; i++){v.push_back(i);}myPrint02 print2 = for_each(v.begin(), v.end(), myPrint02());cout << print2.m_Count << endl;
}//3 for_each可以绑定参数进行输出
struct myPrint03 :public binary_function<int, int, void>
{void operator()(int v, int start) const{cout << v + start << endl;}
};void test03()
{vector<int>v;for (int i = 0; i < 10; i++){v.push_back(i);}for_each(v.begin(), v.end(), bind2nd(myPrint03(), 10000));
}/*
transform算法 将指定容器区间元素搬运到另一容器中
注意 : transform 不会给目标容器分配内存，所以需要我们提前分配好内存
@param beg1 源容器开始迭代器
@param end1 源容器结束迭代器
@param beg2 目标容器开始迭代器
@param _cakkback 回调函数或者函数对象
@return 返回目标容器迭代器
*/class TransForm
{
public:int operator()(int val){return val + 10;}
};
void test04()
{vector<int>v; //原容器for (int i = 0; i < 10; i++){v.push_back(i);}vector<int>vTarget; //目标容器vTarget.resize(v.size());transform(v.begin(), v.end(), vTarget.begin(), TransForm());for_each(vTarget.begin(), vTarget.end(), [](int val) { cout << val << " "; });}//transform 第二种用法 将两个容器数据相加搬运到目标容器
class TransForm2
{
public:int operator()(int val, int val2){return val + val2;}
};void test05()
{vector<int>v1;vector<int>v2;for (int i = 0; i < 10; i++){v1.push_back(100 + i);v2.push_back(200 + i);}vector<int>vTarget; //目标容器vTarget.resize(v1.size());transform(v1.begin(), v1.end(), v2.begin(), vTarget.begin(), TransForm2());// 300 302...for_each(vTarget.begin(), vTarget.end(), [](int val) { cout << val << " "; });cout << "----" << endl;for (vector<int>::iterator it = v1.begin(); it != v1.end(); ++it) {cout << *it << endl;}
}int main() {//test01();//test02();//test03();//test04();test05();system("pause");return EXIT_SUCCESS;
}