rectangletypeimp.cpp

C++编成数据结构与程序设计方法 D.S.Malk编著

#include <iostream>

#include "rectangleType.h"

using namespace std;

void rectangleType::setDimension(double l, double w)
{
    if (l >= 0)
        length = l;
    else
        length = 0;

    if (w >= 0)
        width = w;
    else
        width = 0;
}

double rectangleType::getLength() const
{
    return length;
}

double rectangleType::getWidth()const
{
    return width;
}

double rectangleType::area() const
{
    return length * width;
}

double rectangleType::perimeter() const
{
    return 2 * (length + width);
}

void rectangleType::print() const
{
    cout << "Length = "  << length
         << "; Width = " << width;
}

rectangleType::rectangleType(double l, double w)
{
    setDimension(l, w);
}

rectangleType::rectangleType()
{
    length = 0;
    width = 0;
}

rectangleType rectangleType::operator+ 
                        (const rectangleType& rectangle) const
{
    rectangleType tempRect;

    tempRect.length = length + rectangle.length;
    tempRect.width = width + rectangle.width;

    return tempRect;
}

rectangleType rectangleType::operator* 
                        (const rectangleType& rectangle) const
{
    rectangleType tempRect;

    tempRect.length = length * rectangle.length;
    tempRect.width = width * rectangle.width;

    return tempRect;
}

bool rectangleType::operator== 
                      (const rectangleType& rectangle) const
{
    return (length == rectangle.length &&
            width == rectangle.width);
}

bool rectangleType::operator!= 
                       (const rectangleType& rectangle) const
{
    return (length != rectangle.length ||
            width != rectangle.width);
}