测试template.cpp

这是一些c++例程

// 测试Template.cpp : Defines the entry point for the console application.
//
// 程序代码:

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;

// 类BaseClass模板:
template < typename ElemType = int, ElemType InitVal = 0 >
class BaseClass 
{
  public:
	BaseClass()
		: _elem( InitVal )
	{ 
		cout << "BaseClass " << _elem << " Construction." << endl; 
	}
	
	~BaseClass()
	{ 
		cout << "BaseClass " << _elem << " Destruction." << endl; 
	}
	
	virtual void WhoAmI()
	{ 
		cout << "BaseClass: " << _elem << endl; 
	}

  protected:
	ElemType _elem;
};

//  类BaseClass2模板：
template < typename ElemType = int, ElemType InitVal = 0 >
class BaseClass2 
{
  public:
	BaseClass2()
		: _elem( InitVal )
	{ 
		cout << "BaseClass2 " << _elem << " Construction." << endl; 
	}
	
	~BaseClass2()
	{ 
		cout << "BaseClass2 " << _elem << " Destruction." << endl; 
	}
	
	virtual void WhoAmI()
	{ 
		cout << "BaseClass2: " << _elem << endl; 
	}

  protected:
	ElemType _elem;
};

// 类BaseClassType的派生类ChildClass模板：
template < typename ElemType = int, ElemType InitVal = 0, class BaseClassType = BaseClass<ElemType, InitVal> >
class ChildClass : public BaseClassType 
{
  public:
	ChildClass()
		: _elem( InitVal ) 
	{
		cout << "ChildClass " << _elem << " Construction." << endl;
	}
	
	~ChildClass()
	{ 
		cout << "ChildClass " << _elem << " Destruction." << endl; 
	}
	
	virtual void WhoAmI() 
	{
		BaseClassType::WhoAmI();
		cout << "ChildClass: " << _elem << endl;
	}

  protected:
	ElemType _elem;
};

// 测试主函数：
char c_str[] = ":)";			//全局变量
char str[5]= "^O^";					//全局变量
char p[] = ":-)";
void main( void ) 
{
	
	BaseClass<char*, c_str> bc;
	bc.WhoAmI();
	
	BaseClass2<char*,str> bc2;
	bc2.WhoAmI(); 
	
	ChildClass<char*, p> cc;
	cc.WhoAmI();
	
	ChildClass<long, 123, BaseClass2<char*, p> > cc2;
	cc2.WhoAmI();
}