Ah, I remember doing this in physics last year! Made homework so much easier.
Some suggestions/recommendations from someone who has done this before…
Input/equation selection could be simplified by selecting the equation from a menu(, then input(-ing the appropriate variables. The menu( command is a good command to know anyway, and a sure-fire way to get a sweet looking program with minimal effort.
Alternatively, you could just input( all the variables off the bat, and have the user set the unknowns to (say) 0.
Then you could apply the correct formula based on which variable are 0, and disp( the output.
But whatever you do…
… in the name of good programming practice, replace the goto 1/ lbl 1 with a while loop!
(just make it exit when B=6, or whenever you would goto 2)
In general, you want to avoid goto/lbl at (almost) any cost. They reduce readability, invite the spaghetti monster in, and can cause you program to leak memory. I can only suggest using them in conjunction with menu(, and that is only because there is no alternative.
Last thing, I would appreciate it if I could get some feedback / (constructive) criticism of my game - Mission Raze.
Good luck and have fun.