Hi, I need the answer to this question using the C++ programming language. Thank you. Question:Rectangle Area—Complete the ProgramIf you have downloaded the source code, you will find a partially written program named Pr6-13.cpp in the Chapter 6 folder. Your job is to complete the program. When it is complete, the program will ask the user to enter the width and length of a rectangle and then display the rectangle’s area. The program calls the following functions, which have not been written:getLength – This function should ask the user to enter the rectangle’s length and then return that value as a double.getWidth – This function should ask the user to enter the rectangle’s width and then return that value as a double.getArea – This function should accept the rectangle’s length and width as arguments and return the rectangle’s area. The area is calculated by multiplying the length by the width.displayData – This function should accept the rectangle’s length, width, and area as arguments and display them in an appropriate message on the screen. ------------------------------------------------------------------------Program 6-13// This program demonstrates two value-returning functions.// The square function is called in a mathematical statement.#include <iostream>#include <iomanip>using namespace std; //Function prototypesdouble getRadius();double square(double); int main(){const double PI = 3.14159; // Constant for pidouble radius; // To hold the circle's radiusdouble area; // To hold the circle's area // Set the numeric output formatting.cout << fixed << showpoint << setprecision(2); // Get the radius of the circle.cout << "This program calculates the area of ";cout << "a circle.\n";radius = getRadius(); // Calculate the area of the circle.area = PI * square(radius); // Display the area.cout << "The area is " << area << endl;return 0;} //******************************************************// Definition of function getRadius. *// This function asks the user to enter the radius of *// the circle and then returns that number as a double.*//****************************************************** double getRadius(){double rad; cout << "Enter the radius of the circle: ";cin >> rad;return rad;} //******************************************************// Definition of function square. *// This function accepts a double argument and returns *// the square of the argument as a double. *//****************************************************** double square(double number){return number * number;}

Program: #include <iostream> using namespace std; //declare the functions double getLength();…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Program 6-13

// This program demonstrates two value-returning functions.

// The square function is called in a mathematical statement.

#include <iostream>

#include <iomanip>

using namespace std;

//Function prototypes

double getRadius();

double square(double);

int main()

{

const double PI = 3.14159; // Constant for pi

double radius; // To hold the circle's radius

double area; // To hold the circle's area

// Set the numeric output formatting.

cout << fixed << showpoint << setprecision(2);

// Get the radius of the circle.

cout << "This program calculates the area of ";

cout << "a circle.\n";

radius = getRadius();

// Calculate the area of the circle.

area = PI * square(radius);

// Display the area.

cout << "The area is " << area << endl;

return 0;

}

//******************************************************

// Definition of function getRadius. *

// This function asks the user to enter the radius of *

// the circle and then returns that number as a double.*

//******************************************************

double getRadius()

{

double rad;

cout << "Enter the radius of the circle: ";

cin >> rad;

return rad;

}

//******************************************************

// Definition of function square. *

// This function accepts a double argument and returns *

// the square of the argument as a double. *

//******************************************************

double square(double number)

{

return number * number;

}

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