static void Main(string[] args)
{
while (true)
{
string a = Console.ReadLine();
string b = Console.ReadLine();
StringInt strint = new StringInt(a);
//strint.Add(b);
//strint.Subtract(b);
strint.Multiply(b);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine(strint.ToString());
Console.ResetColor();
}
Console.ReadKey(true);
}
public void Multiply(string factor)
{
//Console.WriteLine("Called multiply with argument " + factor + " and value " + this.GetValue());
if (factor[0] == '-' ^ this.isNegative)
{
this.isNegative = true;
}
else
{
this.isNegative = false;
}
//Make sure the second factor (stored in variable factor) is shorter
if (this.value.Length < factor.Length)
{
string temp = this.value;
this.value = factor.TrimStart('-');
factor = temp;
}
factor = factor.TrimStart('-');
string num = this.value;
int factorLength = factor.Length;
short c = 0;
string[] partResults = new string[factorLength];
for (int i = 1; i <= factorLength; i++)
{
short b = 0;
string revertedResult = String.Empty;
try
{
b = Convert.ToInt16(factor[factor.Length - i].ToString());
}
catch (IndexOutOfRangeException) { }
for (int j = 1; j <= num.Length + 1; j++)
{
short a = 0;
try
{
a = Convert.ToInt16(num[num.Length - j].ToString());
}
catch (IndexOutOfRangeException) { }
int result = (Convert.ToInt16(a) * Convert.ToInt16(b) + c);
c = 0;
if (result >= 10)
{
c = (short)(result / 10);
result %= 10;
}
revertedResult += result;
}
//Revert string
char[] resultCharArr = revertedResult.ToCharArray();
Array.Reverse(resultCharArr);
//Add extra zeros to the end and save it as part result
string suffix = String.Empty;
for (int j = 0; j < i - 1; j++)
{
suffix += "0";
}
partResults[i - 1] = new string(resultCharArr).TrimStart('0') + suffix;
}
//Add all part results together
StringInt sum = new StringInt("0");
for (int i = 0; i < factorLength; i++)
{
if (partResults[i].Length == 0)
{
partResults[i] = "0";
}
sum.Add(partResults[i]);
}
this.value = sum.GetValue().TrimStart('-');
}
public bool SmallerThan(string compare)
{
StringInt reversed = new StringInt(compare);
return(reversed.GreaterThan(this.value));
}
public void Subtract(string reducer)
{
//Console.WriteLine("Called subtract with argument " + reducer + " and value " + this.GetValue());
if (!this.isNegative)
{
if (reducer[0] != '-')
{
//(+) - (+)
//Don't change anything
}
else
{
//(+) - (-)
reducer = reducer.TrimStart('-');
this.Add(reducer);
return;
}
}
else
{
if (reducer[0] != '-')
{
//(-) - (+)
this.isNegative = false;
this.Add(reducer);
this.isNegative = true;
return;
}
else
{
//(-) - (-)
//Don't change anything
}
}
//Make sure the first number is greater than the reducer
StringInt temp = new StringInt(reducer.TrimStart('-'));
if (temp.GreaterThan(this.value.TrimStart('-')))
{
string tempVal = this.GetValue();
this.Set(reducer);
reducer = tempVal;
this.isNegative = !this.isNegative;
}
reducer = reducer.TrimStart('-');
int numLength = (reducer.Length > this.value.Length) ? reducer.Length : this.value.Length;
numLength++;
string num = this.value;
short c = 0;
string revertedResult = String.Empty;
for (int i = 1; i <= numLength; i++)
{
short a = 0, b = 0;
try
{
a = Convert.ToInt16(num[num.Length - i].ToString());
}
catch (IndexOutOfRangeException) { }
try
{
b = Convert.ToInt16(reducer[reducer.Length - i].ToString());
}
catch (IndexOutOfRangeException) { }
int result = Convert.ToInt16(a) - (Convert.ToInt16(b) + c);
c = 0;
if (result < 0)
{
c++;
result += 10;
}
revertedResult += result.ToString();
}
//Revert string
char[] resultCharArr = revertedResult.ToCharArray();
Array.Reverse(resultCharArr);
this.value = new string(resultCharArr).TrimStart('0');
if (this.value.Length == 0)
{
this.Set("0");
}
}
