Questions tagged [week3]
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18 questions
0 votes
1 answer
610 views
I need help to fix my selection sort code - Practice Problems (Average High Temperatures)
I need help fixing my code. I don't know what else to do, I've been trying to sort all the temps array in descending order. But I don't know what I'm doing wrong. Can you help me saying what things I ...
- 17
0 votes
1 answer
451 views
Lab 3 error message: Incorrect assignment of sorts
When I try to submit my answers I get these messages on running check50: :) answers.txt :) answers all questions :( correctly identifies each sort Incorrect assignment of sorts. I'm not sure I'm ...
0 votes
1 answer
100 views
collatz function
So in a week 3 short, Doug asks us to define a file collatz.c that returns the number of steps taken to do the collatz conjecture on different numbers and I ended up with this. #include <stdio.h>...
0 votes
2 answers
447 views
Plurality: Code does not print out the winner
My code does not print out the winners at all...It only outputs their names. Is anybody able to pick out what's incorrect or if the code is missing something? Many thanks in advance :) #include <...
- 5
0 votes
1 answer
396 views
PSET 3 runoff is_tie function
New to this platform, forgive me if there are some norm or etiquette I may be missing. Please feel free to provide feedback on anything that is incorrect. This is for the is-tie function alone. I ...
- 23
0 votes
1 answer
187 views
why am i getting an " use of undeclared identifier 'j' or 'i' " on the vote and tabulate functions?
shouldn't the compiler consider the 'i' and the 'j' from the for loop in the 'main' function to be the voter and rank ints passed to the functions #include <cs50.h> #include <stdio.h&...
0 votes
1 answer
130 views
Can you help me to understand why does the output of time function vary every time while applying it on same file with same sort type?
When I run for example (time ./sort1 random5000.txt) it gives me real, syst, and user time. But if I run the same command again it will gives me different time results! I can't understand why this ...
- 35
0 votes
1 answer
38 views
when to search in binary search right, when left?
in the binary search algorithm: If no items Return false If middle item is 50 Return true Else if 50 < middle item Search left half Else if 50 > middle item Search right half like can we do the ...
0 votes
2 answers
696 views
Error testing in plurality question
I already test my code with all possible input and it working fine but when I run with check50 cs50/problems/2020/x/plurality, I got a couple of error result :( print_winner identifies Bob as ...
- 101
-1 votes
1 answer
40 views
call stacks short vedio
in the call stacks short there is a code when doug explains that the function returns (1) i want to know how the c knows or the computer knows the difference between returning (1) mean the program ...
- 33
0 votes
2 answers
40 views
0 votes
1 answer
74 views
Find.c - Binary Search probable integer overflow
Here's the gist: https://gist.github.com/Securiteru/a83e4f1a028acd0b1013def793b5dcdc And the output: ... 60697 61151 61190 61275 61460 61608 61618 61746 61750 61822 62111 62178 62183 62311 62448 ...
0 votes
1 answer
55 views
Concept of run time in lecture week 3
In week 3's lecture, David talked about the concept of runtime where the worst possible scenario for say insertion sort is O(n squared) and the best case scenario would be omega(n). I dont understand ...
- 29
0 votes
1 answer
62 views
Week 3 Binary Search Video Short question
I just watched the short for binary search and I'm having trouble understanding how making a conditional of (max < min) would mean that the number is not in your array (timestamp 04:05). I get ...
0 votes
1 answer
119 views
Pointers basic Concept with functions
http://cslibrary.stanford.edu/102/PointersAndMemory.pdf Reading this told us that when function gets called its locals gets called and when it exits its locals gets destroyed so that we can't use its ...
- 124