private static MixedNumber ConvertMixedNumberToFraction(MixedNumber num)
{
if (!num.IsMixedNumber)
{
return(num.Clone());
}
var result = new MixedNumber();
result.IsNegative = num.IsNegative;
result.WholeNumber = 0;
result.Numerator = (num.WholeNumber * num.Denominator) + num.Numerator;
result.Denominator = num.Denominator;
return(result);
}
public static MixedNumber Subtract(MixedNumber one, MixedNumber two)
{
if (one.IsZero && two.IsZero)
{
return(MixedNumber.Zero);
}
if (one.IsZero)
{
var twoDash = two.Clone();
twoDash.IsNegative = !two.IsNegative;
return(twoDash);
}
if (two.IsZero)
{
return(one.Clone());
}
var result = new MixedNumber();
if (one.IsWholeNumber && two.IsWholeNumber)
{
var oneWholeNumber = one.IsNegative == true ? -1 * one.WholeNumber : one.WholeNumber;
var twoWholenumber = two.IsNegative == true ? -1 * two.WholeNumber : two.WholeNumber;
var wholeNumber = oneWholeNumber - twoWholenumber;
if (wholeNumber < 0)
{
result.WholeNumber = wholeNumber * -1;
result.IsNegative = true;
}
else
{
result.WholeNumber = wholeNumber;
}
return(result);
}
var x = ConvertMixedNumberToFraction(one);
var y = ConvertMixedNumberToFraction(two);
Reduce(x);
Reduce(y);
if (x.IsWholeNumber == true)
{
x.Numerator = y.Denominator * x.WholeNumber;
x.Denominator = y.Denominator;
x.WholeNumber = 0;
}
else if (y.IsWholeNumber == true)
{
y.Numerator = x.Denominator * y.WholeNumber;
y.Denominator = x.Denominator;
y.WholeNumber = 0;
}
else
{
var lcm = LeastCommonMultiple(x.Denominator, y.Denominator);
MultiplyToNumeratorAndDenominator(x, lcm);
MultiplyToNumeratorAndDenominator(y, lcm);
}
var three = new MixedNumber();
var xNumerator = x.IsNegative ? -1 * x.Numerator : x.Numerator;
var yNumerator = y.IsNegative ? -1 * y.Numerator : y.Numerator;
var n = xNumerator - yNumerator;
if (n == 0)
{
return(three);
}
else if (n < 0)
{
three.IsNegative = true;
n *= -1;
}
three.Numerator = n;
three.Denominator = x.Denominator;
Reduce(three);
ConvertToMixedNumber(three);
return(three);
}