Question

Write an algorithm for a program that prompts the user to enter the radius of a circle, and then calculate its area

Answer 1

#include <iostream>


using namespace std;




int main(){
	float PI = 3.147;
	float radius = 0;
	cout<<"Enter the radius of a circle: ";
	cin>>radius;


	float area=PI*radius*radius;
	cout<<"Area = "<<area<<"\n";


	system("pause");
	return 0;
}