Re: How to convert characters in a string into integers ?

[John English <je@brighton.ac.uk>]

Jim wrote:
> 
> is this possible, if so how ?
> 
> say im reading a string (1 + 2 + 3)    (yep carrying on with my calculator
> program :-))
> 
> how to get 1 and the convert to integer, then get + and store as character,
> get 2 and convert to integer etc ?

One way is described in section 13.3 of the textbook you're using:
you use Ada.Text_IO.Look_Ahead to see if the character you're about
to read is a digit, and if it is use Ada.Integer_Text_IO.Get to read
an integer.

Another way is to convert this pseudocode to Ada:
  result = 0
  while (next char is a digit) loop
    result = result * 10 + (value of digit char)
  end loop

There are other ways than these, too...

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