I worked on these projects long time ago – possibly during my school and high school days. I started programming with Q-Basic and moved to visual basic, pascal and finally C/C++ and python.
Sudoku Solver
I made this program some time ago. The technique is just plain brute force. However, it rotates the Sudoku puzzle so that the brute force will be more effective. You can view the Sudoku solver Source Code here.
Sigma Calc
This was the result my terrible try to create a parsing calculator. Instead of reading about lexer and parsing, I opted to directly code a parsing calculator. The result is a mess. Anyway, this is my first try in anything related to compiler. So, i love it 🙂 . You can download it from it’s source-forge page .