函数对象源代码

// funcall.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
using namespace std;
class CFun
{
public:
	CFun(int nVal = 100)
	{
		m_nData = nVal;
	}
	~CFun()
	{
	}
public:
	int operator() (int nSub)
	{
		return (m_nData - nSub);
	}
private:
	int	m_nData;
};
void CallFun(int n, CFun& objFun);
int _tmain(int argc, _TCHAR* argv[])
{
	CFun objFun(200);
	CallFun(10, objFun);
	return 0;
}
void CallFun(int n, CFun& objFun)
{
	int nVal = objFun(n);
	cout << "nVal = " << nVal << endl;
}