#include <iostream.h>
#include <iomanip.h>
#include <math.h>

// UP-Deklaration und -Definition zusammen
    float berechne_umfang(float pii, int rr) {return(2 * pii * rr);}; 
    float berechne_flaeche(float piii, int rrr) {return(piii * rrr * rrr);}; 
int main()
{
    int r=4;
    float pi = 3.14259; 
    cout << "u = " << berechne_umfang(pi, r)<< endl << "f = " << berechne_flaeche(pi, r) << endl;
    cout << "\nProgrammende...";
cin.get (); cin.get();
return(0);    
    }