private static string Run(string num1, string num2, char op)
{
string[] numbers = new string[] { num1, num2 };
switch (op)
{
case 'a':
case '+':
LargeNumberAdder a = new LargeNumberAdder();
return(a.Compute(numbers));
break;
case 's':
case '-':
LargeNumberSubtractor s = new LargeNumberSubtractor();
return(s.Compute(numbers));
break;
case 'x':
case 'm':
case '*':
LargeNumberMultiplier m = new LargeNumberMultiplier();
return(m.Compute(numbers));
break;
case '/':
case 'd':
LargeNumberDivider d = new LargeNumberDivider();
return(d.Compute(numbers));
break;
default:
PrintHelp();
return("");
}
}
public string Compute(IList <string> numbers)
{
if (numbers.Count < 2)
{
throw new Exception("Need at least 2 numbers to multiply, found: " + numbers.Count);
}
StringMatrixTransformer smt = new StringMatrixTransformer();
ILargeNumberComputer a = new LargeNumberAdder();
ArithmeticUtils au = new ArithmeticUtils();
string num = numbers[0];
IList <IList <int> > matrix = smt.TransformStringListToReversedIntMatrix(numbers);
for (int i = 1; i < numbers.Count; i++)
{
IList <int> m = matrix.ElementAt(i);
ILargeNumberComputer lom = new LargeToOneNumberMultiplier();
IList <string> stageIntermediates = new List <string>();
for (int j = 0; j < m.Count; j++)
{
string prefix = "";
int n = m[j];
//add the 0 to handle decimal place of the multiplying number
for (int k = 0; k < j; k++)
{
prefix += "0";
}
stageIntermediates.Add(lom.Compute(new List <string>()
{
num, n.ToString()
}) + prefix);
}
num = a.Compute(stageIntermediates);
}
return(num);
}
