/* From: "COMPUTATIONAL PHYSICS, 2nd Ed" 
   by RH Landau, MJ Paez, and CC Bordeianu 
   Copyright Wiley-VCH, 2007.
   Electronic Materials copyright: R Landau, Oregon State Univ, 2007;
   MJ Paez, Univ Antioquia, 2007; & CC Bordeianu, Univ Bucharest, 2007
   Support by National Science Foundation
*/
//  over.c: Determine overflow and underflow limits   

#include <stdio.h>
#define N 1024                    // might not be big enough to cause
                                                // over and underflow
main()  {
	
  double under = 1., over = 1.;                    // starting values
  int i;
	
  for (i = 0; i<1024; i++) {
    under /= 2.;                                     // divide by two
    over  *= 2.;                                   // multiply by two
    printf("%d. under: %e over: %e \n",i+1,under,over);
  }
}