ciderpunx was right about deleting

char (op==65 && op==83 && op==77 && op==68)

because it doesn't really do anything

ya know?

I would keep it comment code just so you know what variables are supposed to be accepted when this code gets huge

so if you delete that line and you accept the second number before you do the math your code will be correct

~ Geo

 ~ You are unique, just like everyone else