#include <stdio.h>

int main() {
  float x, y;
  float * ptrX;
  float res;
  ptrX = &x;
  x=42; 
  y=*ptrX;
  y=x/y;
  res=x/*ptrX /* There is a surprise here ... */+x;
  printf("res=%f\n",res);
}