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Programming Puzzle 1 - Simple Loop

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  • BigBoss1
    Re: Programming Puzzle 1 - Simple Loop

    Just a small addition to CALockin's answer to include the iterations in the loop.
    Attached Files

    Leave a comment:

  • CALocklin
    Re: Programming Puzzle 1 - Simple Loop

    OK, here's a down and dirty solution: (I just hope I got the right answer!)
    OPTION strict
    'Variables should not be "one word" or "one letter". Not because they won't 
    'work but because they can make debugging harder in long scripts.
    'This is an "abbreviated two word" variable - two words to help make it 
    'unique for search purposes and abbreviated to make it faster to type. 
    'even_sum ==> esum.
    DIM esum as N
    'A single letter preceeded by "q" is easier to find in a search than, in this 
    'case, just the letter "e". The letter "e" is used 18 times but "qe" only 3.
    DIM qe as N
    'Set initial value to 0.
    esum = 0
    'Many people forget that a FOR...NEXT statement can also use a STEP command.
    FOR qe = 102 to 302 step 2
    	esum = esum + qe
    DIM msg as C
    'Although it's possible to use ui_msg_box( "TOTAL", "" + esum ) and let A5 do the 
    'conversion from number to text, it's valuable to know that it's actually faster 
    'if you explicitly specify the conversion. The extra time isn't noticeable in this 
    'case but it can be noticeable when a calculation is being done inside a long loop.
    msg = "The sum of the even numbers between 101 and 302 is:  " + ltrim( str( esum ) )
    ui_msg_box( "TOTAL", msg, ui_information_symbol )
    By the way, "Option Strict" requires that all variables be DIMmed. While it does have its advantages, I personally find it too annoying and virtually never use it. But that does require some care when naming variables to make sure you don't accidentally try to use a "local" variable that is already defined as global or shared.

    Leave a comment:

  • Tom Cone Jr
    started a topic Programming Puzzle 1 - Simple Loop

    Programming Puzzle 1 - Simple Loop

    If you've been thinking that this summer might be a good time to learn a little xbasic, I have a treat in store for you.

    I'm planning to post a series of programming puzzles for you to work on. Puzzles that must be worked out using xbasic.

    Hopefully, these puzzles will give us a springboard from which we can discuss, teach, learn, and benefit from each other's experience.

    In any event, here's my first offering.

    The solution should be presented in the form of an xbasic script. The script should be posted here, or attached to a reply here. You should expect comments, questions, and even corrections. The object is not to "show off" but to provide a safe, non-judgmental area, where people who may be curious about programming, especially, programming in xbasic, can play, have fun, and learn. I rather suspect we'll see more than one way to solve these things. Alpha Five is nothing if not flexible, right?

    Hope you like it.

    -- tom