point4.cpp

《c＋＋大学教程》源码

// Fig. 9.26: point4.cpp
// Point4 class member-function definitions.
#include <iostream>  

using std::cout;
using std::endl;

#include "point4.h"   // Point4 class definition

// default constructor
Point4::Point4( int xValue, int yValue )
   : x( xValue ), y( yValue )
{
   cout << "Point4 constructor: ";
   print();
   cout << endl;

} // end Point4 constructor

// destructor
Point4::~Point4()
{
   cout << "Point4 destructor: ";
   print();
   cout << endl;

} // end Point4 destructor

// set x in coordinate pair
void Point4::setX( int xValue )
{
   x = xValue; // no need for validation

} // end function setX

// return x from coordinate pair
int Point4::getX() const
{
   return x;

} // end function getX

// set y in coordinate pair
void Point4::setY( int yValue )
{
   y = yValue; // no need for validation

} // end function setY

// return y from coordinate pair
int Point4::getY() const
{
   return y;

} // end function getY
   
// output Point4 object
void Point4::print() const
{
   cout << '[' << getX() << ", " << getY() << ']';

} // end function print

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