complex1.cpp

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 18.5: complex1.cpp
// Member function definitions for class Complex
#include <iostream>

using std::cout;

#include "complex1.h"

// Constructor
Complex::Complex( double r, double i ) 
   : real( r ), imaginary( i ) { }

// Overloaded addition operator
Complex Complex::operator+( const Complex &operand2 ) const
{
   return Complex( real + operand2.real, 
                   imaginary + operand2.imaginary );
}

// Overloaded subtraction operator
Complex Complex::operator-( const Complex &operand2 ) const
{
   return Complex( real - operand2.real, 
                   imaginary - operand2.imaginary );
}

// Overloaded = operator
const Complex& Complex::operator=( const Complex &right )
{
   real = right.real;
   imaginary = right.imaginary;
   return *this;   // enables cascading
}

// Display a Complex object in the form: (a, b)
void Complex::print() const
   { cout << '(' << real << ", " << imaginary << ')'; }



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