Thread: Simple program not working, don't know why

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  1. 01-29-2009 #1
    laserlight
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    Quote Originally Posted by esbo
    It seems the problem is the line for the sum is never executed otherwise it would be atleast 1
    on the first pass?
    Yes, the statement to add to sum is never executed, but sum cannot be 1 since it must be an even number. The main problem is that Bakster is not generating the Fibonacci sequence, but rather a variant of it where the current number is twice of the previous plus the number just before the previous. Luckily, there is a simple fix involving the removal of a single character in the source code.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
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  2. 01-29-2009 #2
    Bakster
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    Quote Originally Posted by laserlight View Post
    Yes, the statement to add to sum is never executed, but sum cannot be 1 since it must be an even number. The main problem is that Bakster is not generating the Fibonacci sequence, but rather a variant of it where the current number is twice of the previous plus the number just before the previous. Luckily, there is a simple fix involving the removal of a single character in the source code.
    Ah yes, I see the problem now. Removing the '+' from '+=' on line 10 fixed it. Thanks a lot!
  3. 01-29-2009 #3
    esbo
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    Quote Originally Posted by Bakster View Post
    Ah yes, I see the problem now. Removing the '+' from '+=' on line 10 fixed it. Thanks a lot!
    Ha ha well spotted, it's always hard to find bugs in programs because they always do *exactly* what you tell them to do!!
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