#include "stdafx.h" #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;} complex operator+(complex&c2); void display(); private: double real; double imag; };

complex complex:: operator+(complex&c2) { return complex(real+c2.real,imag+c2.imag); }

void complex::display() { cout<<"("<<real<<","<<imag<<"i)"<<endl; }

int main() { complex c1(3,4),c2(2.5),c3; c3=c1+2.5; //原书如此，遍译无法通过，改为显示调用可以通过，如下。 //c3=c1+complex(2.5); c3.display(); return 0; }