第二十三模板 16多余的临时对像

//第二十三模板 16多余的临时对像





//未具体化num模板类构造函数

/*

#include <iostream>

using namespace std;

const int size=2;

class people

{

public:

	people(int);

	people();

	~people();

	int GetAge()const{ return age;}

	void SetAge(int the){ age = the;}

	people &operator=(const people&r){

	    cout<<"调用people类的operator=函数..."<<endl;

		if(this==&r){

		   return *this;

		}

		age = r.age;

		return *this;

	}

private:

	int age;

};



ostream&operator<<(ostream &out, const people&the)

{

    out<<"调用people类的operator<<函数"<<endl;

	out<<the.GetAge();

	return out;

}



people::people(int thisAge):age(thisAge)

{

   cout<<"调用people类的带一个参数的构造函数"<<endl;

}

people::people():age(0){

   cout<<"调用people类的默认构造函数..."<<endl;

}

people::~people()

{

   cout<<"调用people类的析构函数..."<<endl;

}



template<template<class T> class TT, class T>

ostream &operator <<(ostream &out, const TT<T> &tt);

template<class T>

class num

{

public:

	num(int Tsize=size);

	~num(){ cout<<"调用num模板类的析造函数.."<<endl; delete []pt;}

	num&operator=(const num&);

	T&operator[](int offset){return pt[offset]; }

	const T&operator[](int offset)const

	{

	     return pt[offset];	

	}

	int GetSize()const{ return numsize; }

	friend ostream &operator<< <>(ostream &out, const num<T> &tt);

private:

	int numsize;

	T *pt;

};

template <template <class T> class TT, class T>

ostream &operator<<(ostream &out, const TT<T> &tt)

{

     cout<<"调用num模板类的operator<<函数..."<<endl;

	 for(int i=0; i<tt.GetSize(); i++)

	 {

	     out<<tt[i]<<endl;

	 }

	 return out;

}



template<class T>

num<T>::num(int size):numsize(size)

{

    cout<<"调用num模板类的带一个参数的构造函数"<<endl;

	pt = new T[size];

	for(int i=0; i<size; i++){

	   pt[i] = 0;

	}

}



template <class T>

num<T>&num<T>::operator=(const num&r)

{

    cout<<"调用num模板类的operator=函数..."<<endl;

	if(this==&r){

	   return *this;

	   delete []pt;

	   numsize = r.GetSize();

	   pt = new T[numsize];

	   for(int i=0; i<numsize; i++){

	       pt[i] =r[i];

	   }

	}

	return *this;

}



int main()

{

	num<people>two;

	for(int i=0; i<two.GetSize(); i++)

	{

	    two[i] = i*4;

	}

	cout<<two;

    return 0;

}

*/





//增加具体化num模板构造函数

/*#include <iostream>

using namespace std;

const int size=2;

class people

{

public:

	people(int);

	people();

	~people();

	int GetAge()const{ return age;}

	void SetAge(int the){ age = the;}

	people &operator=(const people&r){

	    cout<<"调用people类的operator=函数..."<<endl;

		if(this==&r){

		   return *this;

		}

		age = r.age;

		return *this;

	}

	friend ostream&operator<<(ostream&, const people&);

private:

	int age;

};



ostream&operator<<(ostream &out, const people&the)

{

    cout<<"调用people类的operator<<函数"<<endl;

	out<<the.GetAge();

	return out;

}



people::people(int thisAge):age(thisAge)

{

   cout<<"调用people类的带一个参数的构造函数"<<endl;

}

people::people():age(0){

   cout<<"调用people类的默认构造函数..."<<endl;

}

people::~people()

{

   cout<<"调用people类的析构函数..."<<endl;

}



template<template<class T> class TT, class T>

ostream &operator <<(ostream &out, const TT<T> &tt);

template<class T>

class num

{

public:

	num(int Tsize=size);

	~num(){ cout<<"调用num模板类的析造函数.."<<endl; delete []pt;}

	num&operator=(const num&);

	T&operator[](int offset){return pt[offset]; }

	const T&operator[](int offset)const

	{

	     return pt[offset];	

	}

	int GetSize()const{ return numsize; }

	friend ostream &operator<< <>(ostream &out, const num<T> &tt);

private:

	int numsize;

	T *pt;

};

template <template <class T> class TT, class T>

ostream &operator<<(ostream &out, const TT<T> &tt)

{

     cout<<"调用num模板类的operator<<函数..."<<endl;

	 for(int i=0; i<tt.GetSize(); i++)

	 {

	     out<<tt[i]<<endl;

	 }

	 return out;

}



template<class T>

num<T>::num(int size):numsize(size)

{

    cout<<"调用num模板类的带一个参数的构造函数"<<endl;

	pt = new T[size];

	for(int i=0; i<size; i++){

	   pt[i] = 0;

	}

}

num<people>::num(int snum):numsize(snum)

{

	cout<<"调用num模板类带一个参数的特殊构造函数"<<endl;

	pt = new people[snum];

}





template <class T>

num<T>&num<T>::operator=(const num&r)

{

    cout<<"调用num模板类的operator=函数..."<<endl;

	if(this==&r){

	   return *this;

	   delete []pt;

	   numsize = r.GetSize();

	   pt = new T[numsize];

	   for(int i=0; i<numsize; i++){

	       pt[i] =r[i];

	   }

	}

	return *this;

}



int main()

{

	num<people>two;

	for(int i=0; i<two.GetSize(); i++)

	{

	    two[i] = i*4;

	}

	cout<<two;

    return 0;

}*/