/*  sfmdnchk.cpp  by K.Tsuru  */
// function ID = 71  DRADIX
/**************************************************
SFraction class
It checks that the denominator is positive or not.
***************************************************/
#ifndef SN_H
#include "sn.h"
#endif
void SFraction::DenCheck(void){
    if(den.Sign(71) == 0 ) den.SetError(den.DIVIDED_BY_ZERO,"SF", 71);
    if(den.Sign() < 0){
        den.ChangeSign();   // den = -den
        num.ChangeSign();   // num = -num
    }
    if(den.IsOne()) reduceDone = true;
}