I'm writing, essentially, a stack calculator where I can change an expression from normal(infix) notation to prefix and postfix and vice versa, and to be able to evaluate a postfix, prefix, or infix expression and return a value. I have been trying to use a switch statement to determine whether my next character read out of a stack is a number, or an operator, or a parenthesis...so on...
Anyways, I am having a few problems with
1. being able to pop a value off of my stack, into another variable and then to switch off of that variable.
2. testing something like
case '+':
if( operatorStack.Peek() = '*')
{
//lowerPrecedence = true;
strPostfix += operatorStack.Pop();
}
else if( operatorStack.Peek= '/')
{
strPostfix += operatorStack.Pop();
}
else
operatorStack.Push(myStack.Pop());
break;
**Obviously this is only testing against a plus sign**
However, concerning the if(operatorStack.Peek() = '+'), I am recieving a error stating that : The left-hand side of an assignment must be a variable, property or indexer.
I think that if I could get past this I would be ok.....
Additionally, I copied this same code into a new class library, so that I can call each function when I need it....but I didn't get the compiler error, although I havent yet referenced it into my main so I don't know if it is logically sound....
Any ideas anybody?