C++语言 通过类模板实现加法计算器

//C++语言 通过类模板实现加法计算器http://pythonschool.com/python/100.html#include "stdafx.h"#include <iostream>using namespace std;template <class T>class Calculate //声明一个模板类{    public:        Calculate(T a, T b);    public:        T Add();        T Substraction();        void display();    private:        T m_a;        T m_b;};template <class T>Calculate<T>::Calculate(T a, T b){    m_a = a;    m_b  = b;}template <class T>T Calculate<T>::Add(){    return m_a + m_b;}template <class T>T Calculate<T>::Substraction(){    return m_a - m_b;}template <class T>void Calculate<T>::display(){    cout << "a:" << m_a << endl;    cout << "b:" << m_b << endl;}int main(int argc, char* argv[]){    Calculate<int> cal1(20, 10);    cal1.display();    cout << "Add():" << cal1.Add() << endl;    cout << "Substraction():" << cal1.Substraction() << endl;        Calculate<double> cal2(100.23, 40);    cal2.display();    cout << "Add():" << cal2.Add() << endl;    cout << "Substraction():" << cal2.Substraction() << endl;    return 0;}