Re: Need help for a Calculator program

[Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>]

"Jim" <genx54321@hotmail.com> writes:

> ive now used "end_of_line" instead of "if operator = '.' then put(result)".
> 
> but what happens now, you can put any character after the expression eg 1 +
> 2 + 3f,  1 + 2 + 3z press enter and get the answer.
> 
> if you dont put anything after the last operand it doesnt do anything.  This
> is because the loop has the check the next character after the last operand
> right ?
> 
> how do i make loop exit without it actually reading the next character ?

Well, I need to see the code to be sure. 

I would read an entire line into a string, using Get_Line (Buffer,
Buffer_Last). Then go thru the string looking for operators and
operands. When you get to the end of the string, you are done.

Or you can require the user to enter a semicolon to terminate a
statement, like Ada does. That makes things simpler for the
programmer, which is ok while you are just learning.

-- 
-- Stephe