/* OK - The good and natural solution - with use of parameters and return value */

#include <stdio.h>
#include <math.h>

double hypotenuse (double katete1, double katete2){
  return sqrt(katete1 * katete1 + katete2 * katete2);
}

int main(void) {
  double k1, k2;
  printf("Indlaes to kateter: ");
  scanf("%lf %lf", &k1, &k2);

  printf("Katete1: %f, katete2: %f, hypotenuse: %f\n",
         k1, k2, hypotenuse(k1, k2));
}