#include <iostream>
using namespace std;

double funktion(double *x);

int main(){
    double A = 2;
    double B = 3;
    double summa = 0;
    summa = funktion(&A) + funktion(&B);
    cout << summa;
}

double funktion(double *x){
    *x = (*x)+(*x);
    double p = (*x);
    return p;
}