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 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.
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.
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?
This is in C language. When I call rotate() in main, the function returns false for isalpha() even though the string entered for plaintext uses alphabetic characters. Perhaps it’s identifying an alphabetic character by its ASCII value (‘A’ = 65)? I tried to test that out and used (char) with the letter variable in rotate()...
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.
In VS I am told this function “does not return a value in all control paths.” A bot told me specifically the issue is with this line: else if (letter + key 90)...
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.
What is %.2f? Why is it not just %f? Is there some additional calculation happening? The half function already does all the calculations including splitting the bill, so I’m not sure what %.2f is. (Btw why is this code not formatting correctly in lemmy?)...
Why does the for loop repeat in this recursion?
I used the debugger to examine this code but not understanding a couple areas....
Why does isalpha() fail to identify an alphabetic character?
This is in C language. When I call rotate() in main, the function returns false for isalpha() even though the string entered for plaintext uses alphabetic characters. Perhaps it’s identifying an alphabetic character by its ASCII value (‘A’ = 65)? I tried to test that out and used (char) with the letter variable in rotate()...
Why does a control path not execute in this function?
In VS I am told this function “does not return a value in all control paths.” A bot told me specifically the issue is with this line: else if (letter + key 90)...
What is this format specifier?
What is %.2f? Why is it not just %f? Is there some additional calculation happening? The half function already does all the calculations including splitting the bill, so I’m not sure what %.2f is. (Btw why is this code not formatting correctly in lemmy?)...