类的特化

#include<iostream>

#include<string>

#include<typeinfo>

using namespace std;

template<class T>

class D

{

public:

  D(T x,T y):m_x(x),m_y(y){}

  int compare(void)

  {

    cout<<"Type of m_x is "<<typeid(m_x).name()<<endl;

    cout<<"Type of m_y is "<<typeid(m_y).name()<<endl;

    if(m_x<m_y)

return -1;

    if(m_x>m_y)

return 1;

    return 0;

  }

private:

  T m_x;

  T m_y;

};

//类的模板特化

template<>class D<char*>

{

public:

  D(char*x,char*y):m_x(x),m_y(y){}

  int compare(void)

  {

    cout<<"***Type of m_x is***"<<typeid(m_x).name()<<endl;

    cout<<"****Type of m_y is***"<<typeid(m_y).name()<<endl;

    if(strcmp(m_x,m_y)>0)

return 1;

    if(strcmp(m_x,m_y)<0)

return -1;

    return 0;

  }

private:

  char* m_x;

  char* m_y;

};

/*

//成员函数的特化

template<>

int D<char*>::compare(void)

{

    cout<<"***Type of m_x is***"<<typeid(m_x).name()<<endl;

    cout<<"****Type of m_y is***"<<typeid(m_y).name()<<endl;

    if(strcmp(m_x,m_y)>0)

return 1;

    if(strcmp(m_x,m_y)<0)

return -1;

    return 0;

}*/

int main(int argc,char*argv[])

{

  D<int>d1(10,20);

  cout<<d1.compare()<<endl;

  //

  D<double>d2(0.1,0.2);

  cout<<d2.compare()<<endl;

  

  D<string>d3("good","better");

  cout<<d3.compare()<<endl;

  char sz1[]="courage";

  char sz2[]="excellent";

  D<char*>d4(sz1,sz2);//比较的是两个字符指针

  cout<<d4.compare()<<endl;

  return 0;

}