#include<iostream> using namespace std; class complex{ double real,imag; public: complex( double r= 0, double i= 0){ real=r; imag=i; } complex operator+ (complex &c2); void display(); }; complex complex:: operator+(complex &c2) { complex c; c.real=real+c2.real; c.imag=imag+c2.imag; return c; } void complex::display(){ cout<<real<< " + "<<imag<< " i "<<endl; } int main() { complex a( 1, 2),b( 2, 3),c; c=a+b; c.display(); }
还有种更简单的方法，重载函数还可以这样写
complex complex::operator+(complex &c2)
{
return complex(real+c2.real,imag+c2.imag); }