private static IParsingTreeVertex WorkRealSentence(String sentence)
{
int number = 0;
ParsingStack stack = new ParsingStack();
Operation result = GetNeededOperation(sentence[1]);
stack.Push(result);
sentence = sentence.Remove(0, 3);
while (sentence.Length != 0)
{
try
{
while (stack.Top().GetCount() == 2)
{
stack.Pop();
}
}
catch (StackNullExeption)
{
return(result);
}
switch (sentence[0])
{
case '+':
case '-':
case '*':
case '/':
{
Operation pushed = GetNeededOperation(sentence[0]);
AddChildToStackTop(stack.Top(), pushed);
stack.Push(pushed);
sentence = sentence.Remove(0, 1);
break;
}
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
{
number = ConvertToInt(ref sentence);
Operand added = new Operand(number);
number = 0;
AddChildToStackTop(stack.Top(), added);
break;
}
case '(':
case ')':
case ' ':
{
sentence = sentence.Remove(0, 1);
break;
}
default:
{
throw new WrongInputException("Unexpected character \"" + sentence[0] + '\n');
}
}
}
throw new ConstructorFailException("Didn't manage...");
}
private static IParsingTreeVertex WorkRealSentence(String sentence)
{
int number = 0;
ParsingStack stack = new ParsingStack();
Operation result = GetNeededOperation(sentence[1]);
stack.Push(result);
sentence = sentence.Remove(0, 3);
while (sentence.Length != 0)
{
try
{
while (stack.Top().GetCount() == 2)
{
stack.Pop();
}
}
catch(StackNullExeption)
{
return result;
}
switch (sentence[0])
{
case '+':
case '-':
case '*':
case '/':
{
Operation pushed = GetNeededOperation(sentence[0]);
AddChildToStackTop(stack.Top(), pushed);
stack.Push(pushed);
sentence = sentence.Remove(0, 1);
break;
}
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
{
number = ConvertToInt(ref sentence);
Operand added = new Operand(number);
number = 0;
AddChildToStackTop(stack.Top(), added);
break;
}
case '(':
case ')':
case ' ':
{
sentence = sentence.Remove(0, 1);
break;
}
default:
{
throw new WrongInputException("Unexpected character \"" + sentence[0] + '\n');
}
}
}
throw new ConstructorFailException("Didn't manage...");
}
public void Initialization()
{
stack = new ParsingStack();
}
