617 games and counting


By briac Published on Jul 16th, 2016 Last updated on Jul 24th, 2016

Here is a fun math game, inspired by theĀ game "24", where you have to make mental calculation to obtain a target number with only the 4 integers given to you.

You can use parenthesis and standard operators (+,-,*,/) to get to the result.

Good luck!

The fun part in this cartridge is the calculator which includes a parsing Shunting-yard algorithm to generate and evaluate an RPN expression.

1.4 Update :

  • Fix an issue when there was still numbers on the stack when evaluating an expression (like "829" evaluated to "9", instead of giving an error)

1.3 Update :

  • Button X deletes the last character
  • The delete button is replaced by a "c" (like in a calculator) to reset the guess

1.2 Update :

  • Fixed a bug with the shunting yard algorithm (the test for operator precedence was incorrect)
  • Added a debug/test mode for RPN calculation (set the scene=2)

1.1 Update :

  • Score, timer and difficulty indicator
  • Fireworks when a correct solution is guessed (from theĀ Fireworks effects by Saccharine)
  • Some invalid calculations are detected (not all)
  • Fixed some other bugs