Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
In this lab, you create a programmer-defined class and then use it in a C++
Instructions
- Ensure the class file named Rectangle.cpp is open in your editor.
- In the Rectangle class, create two private attributes named length and width. Bothlength and width should be data type double.
- Write public set methods to set the values for length and width.
- Write public get methods to retrieve the values for length and width.
- Write a public calculateArea()method and a public calculatePerimeter() method to calculate and return the area of the rectangle and the perimeter of the rectangle.
- Open the file named MyRectangleClassProgram.cpp.
- In the MyRectangleClassProgram, create two Rectangle objects named rectangle1 and rectangle2 using the default constructor as you saw in MyEmployeeClassProgram.cpp.
- Set the length of rectangle1 to 10.0 and the width to 5.0. Set the length of rectangle2 to 7.0 and the width to 3.0.
- Print the value of rectangle1’s perimeter and area, and then print the value of rectangle2’s perimeter and area.
- Execute the program by clicking the Run button at the bottom of the screen
GIVEN CODE
MyRectangleClassProgram.cpp
// This program uses the programmer-defined Rectangle class.
#include "Rectangle.cpp"
#include <iostream>
using namespace std;
int main()
{
Rectangle rectangle1;
Rectangle rectangle2;
rectangle1.setLength(10.0);
rectangle1.setWidth(5.0);
rectangle2.setLength(7.0);
rectangle2.setWidth(3.0);
cout << "Perimeter of rectangle1 is " << rectangle1.calculatePerimeter() << endl;
cout << "Area of rectangle1 is " << rectangle1.calculateArea() << endl;
cout << "Perimeter of rectangle2 is " << rectangle2.calculatePerimeter() << endl;
cout << "Area of rectangle2 is " << rectangle2.calculateArea() << endl;
return 0;
}
Rectangle.cpp
// Rectangle.cpp
using namespace std;
class Rectangle
{
public:
// Declare public methods here
private:
// Create length and width here
};
void Rectangle::setLength(double len)
{
}
void Rectangle::setWidth(double wid)
{
// write setWidth here
}
double Rectangle::getLength()
{
// write getLength here
}
double Rectangle::getWidth()
{
// write getWidth here
}
double Rectangle::calculateArea()
{
// write calculateArea here
}
double Rectangle::calculatePerimeter()
{
// write calculatePerimeter here
}
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