#include "main_def.h"



#include <math.h>



// defines all the tools to manipulate "don't knows"

#if _compact_storage==0
	ST _dont_know=255;
#elif _compact_storage==1
	ST _dont_know=-32766;
#elif _compact_storage==2
	ST _dont_know=-2147483647;
#endif

boolean _uses_dont_know=false;

ST dont_know() { return _dont_know; }

void set_dont_know(const ST v) { _dont_know=v; _uses_dont_know=true; }



// Debugging

int trace = 0;

ofstream flog;




double SQRT(double x) { return ( (x>0) ? sqrt(x) : 0 ); }