技術標籤：# 4.1 C++c++stltransform

#include <iostream>
#include <vector>
#include <list>
#include <algorithm>
#include <functional>

using namespace std;

void print(int& Ele)
{
	cout << Ele << ", ";
}

template <class T> 
class customFun {
 

public:
	T Parm;
public:
	customFun(const T& _Val) :Parm(_Val)
	{}
	int operator()(T& elem) const
	{
		return elem * Parm;
	}

};

template <class T> 
class customFun2 {
public:
	T Parm;
public:
	customFun2(const T& _Val) :Parm(_Val)
	{}
	int operator()(T& elem, T& elem2) const
 

	{
		return (elem + elem2) * Parm;
	}
};

void main()
{
	int dim[] = { 1,2,3,4,5,6,7,8,9 };
	vector<int>v1, v2;
	list<int> l1;

	v1.assign(dim, dim + 9);
	cout << "vector v1: ";
	for_each(v1.begin(), v1.end(), print);
	cout << endl;

	transform(v1.begin(), v1.begin
 
() + 5, v1.begin(), customFun<int>(4));
	cout << "vector v1(transformed): ";
	for_each(v1.begin(), v1.end(), print);
	cout << endl;

	copy(v1.begin(), v1.end(), back_inserter(l1));
	cout << "list l1: ";
	for_each(l1.begin(), l1.end(), print);
	cout << endl;

	transform(v1.begin(), v1.end(), l1.begin(), l1.begin(), customFun2<int>(2));
	cout << "vector l1(=(v1+l1)*2): ";
	for_each(l1.begin(), l1.end(), print);
	cout << endl;

	transform(v1.begin(),v1.end(),l1.begin(),ostream_iterator<int>(cout,", "),customFun2<int>(2));
	cout<<endl;
	transform(v1.begin(),v1.end(),l1.begin(),back_inserter(v2),customFun2<int>(2));
	cout<<"vector l1(=(v1+l1)*2): ";
	copy(v2.begin(),v2.end(),ostream_iterator<int>(cout,", "));
	cout<<endl;
}