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;
}*/