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milon

@ milon @lemm.ee

Posts
9
Comments
32
Joined
3 yr. ago

  • Why can't I use the '|' bitwise operator in this statement?

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  • I did come across that link but didn't quite understand it. If looking only at 25 | 10, does the code not run as expected because 25 is 5 digits long and 10 is 4 digits long? Is that what's meant by "two equivalent length bit designs"?

    Also, I can't tell if 10 | 4 = 7 or 10 | 4 = 14.

  • Why does the for loop repeat in this recursion?

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  • Yes, that helps. Thanks. I see now how n goes from 1 to 2 to 3...etc. Now not so sure how i = 1 when the for loop starts.

  • Why does the for loop repeat in this recursion?

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  • Yes - I finally caught that part about n as it's just moving in reverse so it gets decremented. Now I'm not sure about i. In the debugger when the program gets to the for loop both n and i are equal to 1. The n I understand but i?

  • Why does the for loop repeat in this recursion?

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  • Gotcha. Thanks for the explanation.

  • Why does the for loop repeat in this recursion?

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  • I see. I guess my understanding was that the recursion was over after the recursive call, but it's actually for all the code in draw().

  • Why does the for loop repeat in this recursion?

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  • Thanks. I did see that. I have a general understanding of how recursion works I think where the function calls itself again and again but I don't get why the code (for loop) below the draw(n - 1) is recursive.

  • Why does the for loop repeat in this recursion?

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  • Right. I was aware it was recursion as stated in the title of my post. I had two questions specific to where the for loop returns after printing #.

  • Why does the for loop repeat in this recursion?

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  • Why does the for loop return when it hits the end of the function? Isn't the recursive portion already completed in draw(n - 1)? The rest of it is just normal non-recursive code if I understand it correctly.

  • Why does the for loop repeat in this recursion?

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  • Yep

  • Why does the for loop repeat in this recursion?

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  • It's supposed to be a pyramid but not my code. It's an example of a recursive function from a CS50 lecture and I'm just trying to understand how the code works line by line.

  • Why does isalpha() fail to identify an alphabetic character?

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  • Ah ha! Yes, I did check the docs but I think I just glanced over that portion. Be more careful next time. Now that I took another look at the other ctype.h functions, they all return 1 or 0. I think I confused equivalent python built-in functions as those evaluated to true/false. The < is a less than sign but it seems it doesn't render correctly on Lemmy.

  • Why does a control path not execute in this function?

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  • Ah I see. I had a bad habit of using else if statements instead of else statements because I thought else if could be better in seeing the condition it's testing for so it was clearer. I get the logic is actually different now.