Question

Use DevC++ to implement a program uses objected oriented programming to calculate the area of a rectangle. The program should create a Rectangle class that has the following attributes and member functions:

Attributes:
width and length

Member functions:
setWidth(), setLength(), getWidth() , getLength(), getArea()

Where width and length are the respect width and length of a Rectangle class. The setWidth() and setLength() member function should set the length and width, the getWidth(), getLenght(), and getArea() member function should get the length, width, and area. The program should

1. Ask the user for the length and width of rectangle. (5 points)

2. Output the length, width, and area of a rectangle. (10 points)

3. Continue to ask the user to calculate another rectangle area by asking length and width. (10 points)

Prelude to Programming (6th Edition)

Answer 1

Answer: Hey dear student find the solution of your query if you have any doubt feel free to ask. Thanks!!

this C++ program has a Rectangle class and its member variables, member functions. Member functions are used to set width or length of the rectangle and return both. One member functions to get area of the rectangle.

in main asks for length and width from the user , passing parameters into member functions. Print all information on the screen.

#include<iostream>
using namespace std;
class Rectangle//class Rectangle
{
double width;//member variables
double length;

public://member functions
void setWidth(double w)//to set width
{
   width = w;
}
void setLength(double l)//to set length
{
   length = l;
}
double getWidth()//get length
{
   return width;
}
double getLength()//get width
{
   return length;
}
double getArea()//get area
{
   return length*width;
}
};

int main()
{
double l,w,area;//variable declarations
int ans = 1;
Rectangle r1;//create object of the class
while (ans!=0)
{
cout<<"Enter the length of a Rectangle: ";
cin>>l; //ask for length
cout<<"Enter the width of a Rectangle: ";
cin>>w;//ask for width
r1.setLength(l);//call member functions of the class
r1.setWidth(w);
l = r1.getLength();
w = r1.getWidth();
area = r1.getArea();
cout<<endl;
cout<<"Length: "<<l;//print all information of the rectangle
cout<<"\nWidth: "<<w;
cout<<"\nArea: "<<area;
cout<<"\nDo you want to calculate area of another rectangle press any number or press 0 to exit:";
cin>>ans;//again ask from user to execute program
}
return 0;
}

Enter the length of a Rectangle: 5.5 Enter the width of a Rectangle: 3.5 Length: 5.5 Width: 3.5 Area: 19.25 Do you want to calculate area of another rectangle press any number or press 0 to exit:1 Enter the length of a Rectangle: 2.5 Enter the width of a Rectangle: 1.0 Length: 2.5 Width: 1 Area: 2.5 Do you want to calculate area of another rectangle press any number or press 0 to exit:0