Hi, recently I have been working on this infix to postfix notation converter in C++ for my data structures module at the university. I also discovered that Objective-C does not have templates like C++ to create an abstract data type.

Anyway, the infix to postfix requires the use of a Stack and as you can see here there is a way to implement this behaviour using a NSMutableArray.

Grab the source code - InfixToPostfix – The code is based on this java implementation. Click here to read more »