//these functions are mostly used when asked on StackOverflow
int IsEqual(double a, double b) {

    double absDiff = fabs(a - b);
    double precision = PRECISION;
    double max = a > b ? a : b;
    double maxPrecision = max*precision;

    //both are approx zeroes
    if(fabs(a) <= precision && fabs(b) <= precision)
        return 1;

    //is approx equal
    //why shouldn't be this used when comparing with zero?
    if(absDiff <= precision || absDiff < maxPrecision)
        return 1;

    return 0;
}
int IsGreater(double a, double b) {

    double diff = a - b;
    double precision = PRECISION;
    double max = a > b ? a : b;
    double maxPrecision = max*precision;

    //is def greater than
    if(diff > precision || diff > maxPrecision)
        return 1;

    return 0;
}
int IsLess(double a, double b) {

    double diff = a - b;
    double precision = PRECISION;
    double max = a > b ? a : b;
    double maxPrecision = max*precision;

    //is def less than
    if(diff < precision || diff < maxPrecision)
        return 1;

    return 0;
}

//meanwhile this is never seen
int cmpFloats(double a, double b) {

    double diff = a - b;
    double absDiff = fabs(diff);
    double max = a > b ? a : b;
    double precision = PRECISION;
    double maxPrecision = max * precision;

    //both are approx zeroes
    if(fabs(a) <= precision && fabs(b) <= precision)
        return 0;

    //is approx equal
    if(absDiff <= precision || absDiff < maxPrecision)
        return 0;

    //is def less than
    if(diff < precision || diff < maxPrecision)
        return -1;

    //is def greater than
    if(diff > precision || diff > maxPrecision)
        return 1;

    printf("suspicious behavior\n");
    return 0;
}