Identify the blank program code to generate an output in C++ thank you so much This program calculates the area of an circleEnter the radius of the circle: 3The area is 28.2743 #include _(1)using namespace std;(11)float calcArea (float);float PI 3.14159;int main(){float a, area;cout << " This program calculates the area of an circle \n\n";cout <<"Enter the radius of the circle: ";a-(111)area(iv)cout << #The area is " << area << endl;float getRadius (){float radius;cin >> radius;(V).float calcArea (1}(vi)return PI*pow (a, 2);

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This program calculates the area of an circle Enter the radius of the circle: 3 The area is 28.2743

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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Concept explainers

Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.

Question

Identify the blank program code to generate an output in C++ thank you so much

This program calculates the area of an circle
Enter the radius of the circle: 3
The area is 28.2743

#include <iostream>
_(1)
using namespace std;
(11)
float calcArea (float);
float PI 3.14159;
int main()
{
float a, area;
cout << " This program calculates the area of an circle \n\n";
cout <<"Enter the radius of the circle: ";
a-
(111)
area
(iv)
cout << #
The area is " << area << endl;
float getRadius ()
{
float radius;
cin >> radius;
(V).
float calcArea (
1
}
(vi)
return PI*pow (a, 2);

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