Reference no: EM13339836

The definition of the class rectangleType and the definitions of the operator functions are:
#include <iostream>
using namespace std;
class rectangleType
{
//Overload the stream insertion and extraction operators
friend ostream& operator<< (ostream&, const rectangleType &);
friend istream& operator>> (istream&, rectangleType &);
public:
void setDimension(double l, double w);
double getLength() const;
double getWidth() const;
double area() const;
double perimeter() const;
void print() const;
rectangleType operator+(const rectangleType&) const;
//Overload the operator +
rectangleType operator*(const rectangleType&) const;
//Overload the operator *
bool operator==(const rectangleType&) const;
//Overload the operator ==
bool operator!=(const rectangleType&) const;
//Overload the operator !=
rectangleType();
rectangleType(double l, double w);
private:
double length;
double width;
};
Notice that we have removed the member function print because we are overloading the stream insertion operator <<.
//The definitions of the functions operator+, operator*,
//operator==, and operator!= are the same as in Example 14-5.
ostream& operator<< (ostream& osObject,
const rectangleType& rectangle)
{
osObject << "Length = " << rectangle.length
<< "; Width = " << rectangle.width;
return osObject;
}
istream& operator>> (istream& isObject,
rectangleType& rectangle)
{
isObject >> rectangle.length >> rectangle.width;
return isObject;
}
Consider the following program. (We assume that the definition of the class rectangleType is in the header file rectangleType.h.)
//This program shows how to use the modified class rectangleType.
#include <iostream>
#include "rectangleType.h"
using namespace std;
int main()
{
rectangleType myRectangle(23, 45); //Line 1
rectangleType yourRectangle; //Line 2
cout << "Line 3: myRectangle: " << myRectangle
<< endl; //Line 3
cout << "Line 4: Enter the length and width "
<<"of a rectangle: "; //Line 4
cin >> yourRectangle; //Line 5
cout << endl; //Line 6
cout << "Line 7: yourRectangle: "
<< yourRectangle << endl; //Line 7
cout << "Line 8: myRectangle + yourRectangle: "
<< myRectangle + yourRectangle << endl; //Line 8
cout << "Line 9: myRectangle * yourRectangle: "
<< myRectangle * yourRectangle << endl; //Line 9
return 0;
}