/*  sfffcomp.cpp  by K.Tsuru  */
// function ID = 7001   DRADIX
/****************************************************************
SFraction class
It provides the comparison of two abusolute values and
returns sgn(|m| - |n|) = 1, 0 , -1.
 m = m.num/m.den;       n = n.num/n.den;
 |m| - |n| = ( |m.num|*n.den - m.den*|n.num| ) / (m.den*n.den);
****************************************************************/
#ifndef SN_H
#include "sn.h"
#endif
int FFCompare(const SFraction& m, const SFraction& n){
//check the diffrence between the number of figures.
//error is one or under, 99*99 (2+2) = 891*11 (3+2)
    int df;
    df = (int)(m.NumNR().Head()+n.DenNR().Head()) - int(m.DenNR().Head()+n.NumNR().Head());
    if(abs(df) > 1) return Sgn(df); //obvious differnce in the number of figures
    SLong a, b;
    a = m.NumNR()*n.DenNR();    b = m.DenNR()*n.NumNR();
    return LLCompare(a, b);
}