SIMPLE MATHEMATICAL EXPRESSION CALCULATOR

This is a simple mathematical expresion calculator.

• Feature:
  1. Has its own built-in arithmetic functions, which can calculate very big numbers.
  2. Uses stack-based mathematical expression parsing method (which is simple and fast).
  3. Uses strict rules to validate mathematical expressions (prevent crashes).
• Supported elements in the expression:
  1. Arithmetic operators: +, -, *, /
  2. Parentheses: (, )
  3. Numbers (of course)
• Note:
  1. The program's division is integer's division.
• Known bugs:
  1. Still have a limit of the number of digits
  2. Memory leak