On Nov 9, 2010, at 12:27 PM, Peter Breitsprecher wrote: > I'd lie but no.. I was just trying to clarify what I was looking for. I gave > a the code for one of the functions I had written, and then an example of the > input the user is giving below, and then tried to describe in more detail > what I needed help with...
Well, I'm glad you're not lying :). Can you start by picking a name for the function that you're trying to write? John Clements > On 9 November 2010 15:23, Shriram Krishnamurthi <s...@cs.brown.edu> wrote: > Hi, > > That would not be considered an "example" for at least two reasons. Do you > see why? > > >> On Nov 9, 2010 12:17 PM, "Peter Breitsprecher" <pkbre...@lakeheadu.ca> wrote: >> >> As an example, I want have most of the functions for Plus, Minus already >> written. >> >> Here is the code for it. >> >> (define (plus num1 num2) >> (+ num1 num2)) >> >> That is childs stuff... Here is where I am having the problem, and please >> keep in mind I am new to DrRacket... >> >> If my program accepts input such as >> (plus 13 5) >> >> I need to parse it so that I know what it is asking for. If It is a left >> parent, then I need to move on, if it is a right parent, move on to the next >> character, once i get to the next character I can see it is an alphanumeric >> character, but then I need to somehow read the whole word, so that I can >> store that value in a variable so that I can read the next number. If the >> numbers are single digits, it is easy, because they are only one charater >> each and read-char works perfect, but I need something like a read-word, or >> read-number and I can't seem to figure out how to do it. >> >> So really I need to know how do I read the words when there are characters >> present, and read the whole numbers when there is a number present. >> >> >> >> On 9 November 2010 15:00, John Clements <cleme...@brinckerhoff.org> wrote: >> > >> > >> > On Nov 9, 2010, a... >> >> -- >> Kurt Breitsprecher >> (807) 474-9601 >> pkbre...@lakeheadu.ca >> >> >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/users > > > > -- > Kurt Breitsprecher > (807) 474-9601 > pkbre...@lakeheadu.ca >
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