例4.10.cpp

铁道出版社出版的C++的习题源代码

#include<iostream.h>
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r){real=r;imag=0;}
    Complex(double r,double i){real=r;imag=i;}
    friend Complex operator+(Complex c1,Complex c2);
    void display();
private:
    double real;
    double imag;
};
Complex operator+(Complex c1,Complex c2)
{  
    return Complex(c1.real+c2.real,c1.imag+c2.imag);
}
void Complex::display()
{   
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main()
{   
    Complex c1(3,4),c2(5,-10),c3;
    c3=c1+2.5;
    c3.display();
    return 0;
}