#include <iostream>
#include <time.h>
#include <vector>
 
//void menuDisp();
double circum(double);
 
using namespace std;
int main(){
 
    //srand(time(NULL));
    //int x= (rand()%5)+1;
    //cout << x;
 
    //menuDisp();
 
    double rad=0;
    double circumference=0;
    cout << "\nEnter a value for the radius: ";
    cin >> rad;
 
    circumference = circum(rad);
    cout << "\n The circumference of the circle is: " << circumference << endl;
 
 
return 0;
}
 
//void menuDisp(){
//    std::cout << "\nWelcome to the tutorial, press 1 for bacon: ";
//}
 
double circum (double radius){
    double pi = 3.1415;
    double circumf =(2*radius)* pi;
    return circumf;
}
 

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