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#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
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
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.
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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