c10-10.cpp

谭浩强C程序设计习题答案

#include <iostream>
using namespace std;
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;
}