Underflow and division

#include <stdio.h>
//http://codepad.org/oo8rNQWs
#include <stdio.h>
//http://codepad.org/VZnVZtpm
int main()
{
  int i=1;
  float x=2;

  x=x/2;

  for(;i<153;i++, x/=2){
    printf("2^-%03d: x/2.0 - division %03d: (%6.3e / 2.0) = %0.3e\n",i,i,x,(x/2) );
  }

  return 0;
}