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/*

#include

int ilogb ( double x  )
int ilogbf ( float x  )
int ilogbl ( long double x  )

  */

  #include

  #include 
 #include 

  int main(char *argv[])
  {

	int exposant = 0;
	double x = -1.509812734e200;

	while ( exposant < atoi(argv[0]) )
	{
  exposant = ilogb( x );
  printf( "The exposant of %g is %d.n", x, exposant );

  if ( x < 0.0 && x * x > 1.0 )
    x /= 1e34;
  else
    x += 1.1, x *= 2.2e34 ;
	}

  }