This was the home programming assignment: Write a program to parse and evaluate arithmetic expressions. Your problem should support addition and multiplication at a minimum. It should be creating in an object oriented manner. Do not use the "shunting yard" algorithm.
Sigiloso
I used a parse tree to evaluate the expressions. It was able to solve addition, subtraction, multiplication, and division (with some problems). It had input sanitation to make sure the input expressions were valid. Admittedly my code may not have been very clean, but it did perform the minimum requirements.