Question

In need of assistance in C++ code:

Design and implement class Rectangle to represent a rectangle object. The class defines the following attributes (variables) and methods:

1. Two Class variables of type double named height and width to represent the height and width of the rectangle. Set their default values to 0 in the default constructor.
2. A non-argument constructor method to create a default rectangle.
3. Another constructor method to create a rectangle with user-specified height and width.
4. Method getArea() that returns the area.
5. Method getPerimeter() that returns the perimeter.
6. Method getHeight() that returns the height.
7. Method getWidth() that returns the width.

Now design and implement a test program to create two rectangle objects: one with default height and width, and the second is 5 units high and 6 units wide. Next, test the class methods on each object to print the information as shown below.

Sample run:

First object:

Height:     1 unit

Width:      1 unit

Area:       1 unit

Perimeter: 4 units

Second object:

Height:     5 unit

Width:      6 unit

Area:       30 units

Perimeter: 22 units

Thanks in advance!

Answer 1

#include <iostream>
using namespace std;

class Rectangle {
public:
// instance variables
double height;
double width;

// default constructor
Rectangle() { // need () for contructors
height = 1.0;
width = 1.0;
}

// ovarloaded constructor
Rectangle(double l, double w) {
height = l;
width = w;
}

// accessor methods/getters
double getHeight() {
return height;
}

double getWidth() {
return width;
}

// mutator/setter methods
void setHeight(double h) {
height= h;
}

void setWidth(double width) {
width = width;
}

double getArea() {
double area = height * width;
return area;
}

double getPerimeter() {
double per;
double length2 = height * 2;
double width2 = width * 2;
per = length2 + width2;
return per;
}

};
int main() {
double l,w;
cout<<"Enter height and length: ";
cin>>l;
cin>>w;
Rectangle *r1 = new Rectangle();
   cout<<"First Object:\n";
   cout<<"Height: "<<r1->getHeight()<<" unit(s)"<<endl;
   cout<<"Width: "<<r1->getWidth()<<" unit(s)"<<endl;
cout<<"Area : "<<r1->getArea()<<"unit(s)"<<endl;
cout<<"Perimeter : "<<r1->getPerimeter()<<"unit(s)"<<endl;
Rectangle *r2 = new Rectangle(l, w);
   cout<<"Second Object:\n";
   cout<<"Height: "<<r2->getHeight()<<" unit(s)"<<endl;
   cout<<"Width: "<<r2->getWidth()<<" unit(s)"<<endl;
cout<<"Area : "<<r2->getArea()<<"unit(s)"<<endl;
cout<<"Perimeter : "<<r2->getPerimeter()<<"unit(s)"<<endl;
}

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