c++回调函数

工具vs2008

四个文件：

基类文件： Config.h Config.cpp

子类文件：Profile.h Profile.cpp

主文件：boost.cpp

Config.h:

#include "stdafx.h"
#include <iostream>
using namespace std;
class AbstractProfile
{
private:
string str;
public:
virtual bool onSectionBegin(const char* sectionName) = 0;
public:
bool loadFromFile(const char* fileName);




};

Config.cpp:

#include "stdafx.h"
#include "Config.h"


bool AbstractProfile::loadFromFile(const char* fileName)
{


cout<<"AbstractProfile::loadFromFile fileName ="<<fileName<<endl;
if(onSectionBegin(fileName))
{
cout<<"回调成功！！"<<endl;
}
return true;
}

Profile.h:

#include "stdafx.h"
#include "Config.h"
#include <iostream>
using namespace std;
class Profile:AbstractProfile
{
public:
bool onSectionBegin(const char* sectionName);
bool loadFromFile(const char* fileName);
};

Profile.cpp

#include "stdafx.h"
#include "Profile.h"


bool Profile::onSectionBegin(const char* sectionName)
{
cout<<"Profile::onSectionBegin"<<endl;
return true;
}
bool Profile::loadFromFile(const char* fileName)
{
cout<<"Profile::loadFromFile"<<endl;
return AbstractProfile::loadFromFile(fileName);


}

boost.cpp

#include "Profile.h"

int _tmain(int argc, _TCHAR* argv[])
{ 
Profile pro;


pro.loadFromFile("11.txt");

system("pause"); 
return 0;
}

虚函数调用自己没有实现的函数，在子类中返回父类实现的函数。

运行结果：

Profile::loadFromFile

AbstractProfile::loadFromfile 

Profile::onsectionBeigin