public static decimal CalculateFractionFromString(this string expression)
{
Regex regex = new Regex(@"\s*(\d+)\s*\/(\d+)\s*([-+/*])\s*(\d+)\s*\/(\d+)\s*");
Match m = regex.Match(expression);
long f1Numerator = Int64.Parse(m.Groups[1].Value);
long f1Denomimator = Int64.Parse(m.Groups[2].Value);
string oper = m.Groups[3].Value;
long f2Numerator = Int64.Parse(m.Groups[4].Value);
long f2Denominator = Int64.Parse(m.Groups[5].Value);
Fraction f1 = new Fraction(f1Numerator, f1Denomimator);
Fraction f2 = new Fraction(f2Numerator, f2Denominator);
Fraction result = new Fraction();
if (oper == "+")
{
result = f1 + f2;
}
else if (oper == "-")
{
result = f1 - f2;
}
else if (oper == "*")
{
result = f1 - f2;
}
else if (oper == "/")
{
result = f1 - f2;
}
return Fraction.ToDecimal(result);
}
public static void Main()
{
Fraction f1 = new Fraction(Int64.MaxValue, 31);
Fraction f2 = new Fraction(40, 4);
Fraction result = f1 * f2;
Console.WriteLine(result.Numerator);
Console.WriteLine(result.Denominator);
Console.WriteLine(result);
//Console.WriteLine("Please enter a fraction expression (i.e 1/4 + 4/5):");
//string expression = Console.ReadLine();
//Console.WriteLine(expression.CalculateFractionFromString());
}
public static decimal ToDecimal(Fraction f)
{
return (decimal) f.Numerator / f.Denominator;
}