Check my calc for glitches

Can you check my calculator for glitches? It is not done. The equal and parentheses do not work yet. Just check that you can’t do math expressions that do not work, like 5++5 (double plus signs).

Here is the code:


Works fine

Works fine, but i can’t close the parantacies when i try. Sorry if i spelled it wrong i meant these: ()

Spamming a bunch of zeros and then adding an operator doesn’t work, otherwise that’s all.