#include <stdio.h>
  
  double fun(int x, int y, int z) 
  {
    x++;
    y += 1;
    ++z;
    printf("fun:    %d  %d  %d\n", x, y, z);
    return( (double) (x + y + z) );
  }
  
  int main(void) 
  {
    int x = 2, y = 2, z = 2;
    
    printf("main 1: %d  %d  %d\n", x, y, z);
    z = (int) fun(x, y, z);
    printf("main 2: %d  %d  %d\n", x, y, z);
    
    return(0);
  }