#include #include #include #define PI 3.1416 //define the constant value of PI using namespace std; //std namespace int main() //main function
#include #include #include #define PI 3.1416 //define the constant value of PI using namespace std; //std namespace int main() //main function
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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I need help in understand the codes used in this C++ program. I would also like to know its purpose
![#include<iostream>
#include<cmath>
#include <iomanip>
#define PI 3.1416 //define the constant value of PI
using namespace std; //std namespace
int main() //main function
|{
float n, s; //declaration of variable
Enter number of sides of the polygon: " ; //display the number of sides
cout <<
cin >> n; //input of the number of sides
cout « " Enter length of each side of the polygon:
cin >> s; //input of the length of each sides
; //display the Length of each sides
float perimeter; //declaration of variable
perimeter = n*s; //equation of perimeter
float area; //declaration of variable
area = ((n * (s*s)) / (4.0 * tan(PI/ n))); //equation of area
cout « " Perimeter is : "<<fixed<<setprecision(4)<<perimeter<<"\n" ; //print the perimeter of the polygon
%3D
Area is : "<<fixed<<setprecision(4)<<area<<"\n" ; //print the area of the polygon
cout <<
return 0; //return
- } //end program](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fecfd8f48-5fec-41f2-bbd9-6984f2a9c00e%2F34f4fb5c-94ec-4f53-8f56-b5979cb65a50%2Fcj4fmx8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:#include<iostream>
#include<cmath>
#include <iomanip>
#define PI 3.1416 //define the constant value of PI
using namespace std; //std namespace
int main() //main function
|{
float n, s; //declaration of variable
Enter number of sides of the polygon: " ; //display the number of sides
cout <<
cin >> n; //input of the number of sides
cout « " Enter length of each side of the polygon:
cin >> s; //input of the length of each sides
; //display the Length of each sides
float perimeter; //declaration of variable
perimeter = n*s; //equation of perimeter
float area; //declaration of variable
area = ((n * (s*s)) / (4.0 * tan(PI/ n))); //equation of area
cout « " Perimeter is : "<<fixed<<setprecision(4)<<perimeter<<"\n" ; //print the perimeter of the polygon
%3D
Area is : "<<fixed<<setprecision(4)<<area<<"\n" ; //print the area of the polygon
cout <<
return 0; //return
- } //end program
![A regular polygon has n number of sides with each side of length s. The area of a regular polygon is given by:
ns?
A =
4 tan
The perimeter of a polygon is equal to the length of the boundary of the polygon
Write a C++ program that will output the area and the perimeter of a given regular polygon rounded-off to four
decimal places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fecfd8f48-5fec-41f2-bbd9-6984f2a9c00e%2F34f4fb5c-94ec-4f53-8f56-b5979cb65a50%2Firzjhj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A regular polygon has n number of sides with each side of length s. The area of a regular polygon is given by:
ns?
A =
4 tan
The perimeter of a polygon is equal to the length of the boundary of the polygon
Write a C++ program that will output the area and the perimeter of a given regular polygon rounded-off to four
decimal places.
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