第七周项目4:复数模板类

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/*     * 程序的版权和版本声明部分     * Copyright (c)2013, 烟台大学计算机学院学生     * All rightsreserved.     * 文件名称: 复数模板类.cpp     * 作者:李巧丽     * 完成日期: 2013 年4 月12日     * 版本号: v1.0     * 输入描述:无     * 问题描述: 类成员函数在类外定义,同时实现加减乘除法的运算* 程序输出:复数   */         #include<iostream>using namespace std;template<class numtype>class Complex{    public:    Complex(){real=0;imag=0;}//定义构造函数    Complex(double r,double i){real=r;imag=i;}//构造函数重载    Complex complex_add(Complex &c2);//声明复数相加的函数    Complex complex_subtract(Complex<numtype>&c2);//声明复数相减的函数    Complex complex_multiply(Complex<numtype>&c2);//声明复数相乘的函数    Complex complex_divide(Complex<numtype>&c2);//声明复数相除的函数    void display();//声明输出函数    private:    double real;    double imag;};template<class numtype>Complex<numtype>Complex<numtype>::complex_add(Complex<numtype>&c2){   Complex<numtype>c;   c.real=real+c2.real;   c.imag=imag+c2.imag;   return c;}template<class numtype>Complex<numtype>Complex<numtype>::complex_subtract(Complex<numtype>&c2){   Complex<numtype>c;   c.real=real-c2.real;   c.imag=imag-c2.imag;   return c;}template<class numtype>Complex<numtype>Complex<numtype>::complex_multiply(Complex<numtype>&c2){   Complex<numtype>c;   c.real=real*c2.real-imag*c2.imag;   c.imag=imag*c2.real+real*c2.imag;   return c;}template<class numtype>Complex<numtype>Complex<numtype>::complex_divide(Complex<numtype>&c2){   Complex<numtype>c;   c.real=(real*c2.real+imag*c2.imag)/(real*real+imag*imag);   c.imag=(c2.imag*real-c2.real*imag)/(real*real+imag*imag);   return c;}template<class numtype>void Complex<numtype>::display(){   cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main( ){Complex<int> c1(3,4),c2(5,-10),c3;c3=c1.complex_add(c2);  //需要在模板类中有一个成员函数支持加法运算,有一个形参cout<<"c1+c2=";c3.display( );c3=c1.complex_subtract(c2);cout<<"c1-c2=";    c3.display( );c3=c1.complex_multiply(c2);cout<<"c1*c2=";c3.display( );c3=c1.complex_divide(c2);cout<<"c1/c2=";c3.display( );Complex<double> c4(3.1,4.4),c5(5.34,-10.21),c6;c6=c4.complex_add(c5);cout<<"c4+c5=";c6.display( );c6=c4.complex_subtract(c5);cout<<"c4-c5=";    c6.display( );c6=c4.complex_multiply(c5);cout<<"c4*c5=";c6.display( );c6=c4.complex_divide(c5);cout<<"c4/c5=";c6.display( );return 0;}


运行结果:

心得体会:英语单词好复杂啊,模板类写起来挺麻烦,但对于此类的运算确实方便

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