noob Dev-C++ help. Need to calc area & perimeter of a rectangle (class proj).

[psfign]

Yea, I admit. Im still confused on when to do double, char, int...etc.

But some of this has been trial and error. When i do like 'char m' the program isnt functioning properly.

as far as what = does. Im using it for the equation...if type(user input) equals m (or whichever letter) then there toll would be ___.