#include<iostream>
using namespace std;
#include"vector"
#include"algorithm"
//
void PrintV(vector <int > &temp)
{
for (vector<int>::iterator it = temp.begin(); it != temp.end(); it++)
{
cout << *it << " ";
}
cout << endl;
}
void showV(int &n)
{
cout << n << " ";
}
class C_showV
{
public:
void operator() (int &n)
{
cout << n << " ";
}
protected:
private:
};
class C_showV2
{
public:
C_showV2()
{
this->num = 0;
}
void operator() (int &n)
{
num++;
cout << n << " ";
}
void PrintN()
{
cout << num << endl;
}
protected:
private:
int num;
};
int main()
{
vector <int> v1;
v1.push_back(1);
v1.push_back(6);
v1.push_back(3);
v1.push_back(18);
cout << "PrintV(v1) +++++> ";
PrintV(v1);
cout << endl;
cout << "运用回调函数入口实现：for_each(v1.begin(), v1.end(),showV )+++++> ";
for_each(v1.begin(), v1.end(),showV );
cout << endl;
cout << "运用函数对象入口实现：for_each(v1.begin(), v1.end(),C_showV())+++++> ";
for_each(v1.begin(), v1.end(), C_showV());
cout << "
我是漂亮的分割线，接下来针对于函数对象的几种情况：
";
C_showV2 tem1 = for_each(v1.begin(), v1.end(), C_showV2());
cout << endl;
tem1.PrintN();//4
C_showV2 tem2;
C_showV2 tem11 = for_each(v1.begin(), v1.end(), tem2); // 初始化
cout << endl;
tem11.PrintN(); //4
tem2.PrintN();// 0 tem2和tem1的值不相同的主要原因是实参和形参，在加上for_each的定义是元素 不是引用。
tem11 = for_each(v1.begin(), v1.end(), tem2);//赋值
cout << endl;
tem11.PrintN();//4
system("pause");
}