10
votes
Pset3: Plurality - Weird output!
You should rethink your logic for the print_winners function.
Here's the pseudocode I'd use.
Declare a maxvote int set to 0.
Iterate over the list of candidates
and check the number of votes. If ...
- 18.6k
7
votes
Accepted
pset6 - caesar - check50 error: "expected exit code 1, not 0"
main in Python no longer has a special meaning, but is a regular function, its name only chosen to conform to conventions based in C.
Try exit(1) instead of return 1.
Relevant python docs: https://...
- 20.9k
6
votes
Accepted
pset6 python bleep
Is the problem that you have hardcoded the input file to "banned.txt"?
From the specification:
Accepts as its sole command-line argument the name (or path) of a
dictionary of banned words (i.e., ...
- 27.8k
6
votes
Accepted
pset4 filter: blur seems to be working, but check50 reads errors
You overwrite pixels you still need later, for calculating the neighbouring pixels. What looks about right visually is still wrong.
I made another array, wrote my blurred image to that, then later ...
- 20.9k
6
votes
Accepted
Check50 and style50 not working: pset1
So apparently markupsafe was upgraded and soft_unicode does not exist in it anymore. I downgraded markupsafe to 2.0.1 and it fixed the issue for me:
pip install markupsafe==2.0.1
- 76
5
votes
Accepted
pset1 greedy checking problem
True that check50 is strict about the output. Here is what the instructions say
Incidentally, so that we can automate some tests of your code, we ask that your program’s last line
of output be ...
- 27.8k
5
votes
Accepted
speller works fine but can´t pass check 50
There is a clue in the check50 results. Suspect your testing is on the large dictionary ("it work exactly like the cs50 staff's").
Try the program with the small dictionary. Chances are it will ...
- 27.8k
5
votes
Accepted
Why is my lab1 code failing to pass one test in check50?
It's failing the test because you are using a do-while loop which is incrementing n before it checks if year < y. Remember that the reason to use a do-while loop instead of a while loop is that you ...
- 1,896
4
votes
Accepted
pset4 check50 2016.recover recover.c is working correctly?
Yes, you're getting 50 files, but the last file is wrong. While the image looks right, it has a problem. It's 512 bytes too large.
This is a fairly common error. Look closely at what the code does ...
- 68.2k
4
votes
Accepted
pset3/find check50 frown helpers.c compiles. expected exit code 0, not 1
find.c and helpers.h cannot be altered. When check50 runs, it uses its own copies, so your alterations are lost. That will cause the compile to fail.
You need to make all of your changes in ...
- 68.2k
4
votes
pset1 cash 2022
Looks like you are using the 2022 version of check against the 2021 version of pset1 cash. The 2022 version of the pset has a new function to implement called get_cents. (There may be other ...
- 27.8k
4
votes
cs50p problemset 7 /working.py
This scenario has been described in the CS50 Python ED forum.
When you get this error message:
:( correct working.py passes all test_working checks
expected exit code 0, not 1
It means check50 is ...
- 655
3
votes
problem set 1 and check50 question
You have to also print a newline after the number of coins.
Change this:
printf("%d", totalCoins);
to this:
printf("%d\n", totalCoins);
- 7,376
3
votes
Accepted
Resize check50 results pset4
Wouldn't it work better if you wrote out the headers after you calculate the new new_bf.bfSize and new_bi.biSizeImage ?
If this answers your question, please click on the ckeck to accept. Let's keep ...
- 68.2k
3
votes
Accepted
Pset6 problem in indexes and load function
Here are specific things to look at:
load Declare c as an int instead of size_t, since size_t is unsigned.
indexes
Your allocation for path2 is wrong
char* path2 = (char*)malloc(sizeof(strlen(php) ...
- 27.8k
3
votes
PSET1 - Water fails check50: "expected prompt for input, not exit code of 0"
One option would be to simply use the GetInt(); function in the cs50.h library since it already reprompts the user for input if they give bogus values.
Or implement the feature yourself and use a ...
- 431
3
votes
Accepted
CS50 PSET2 Check 50 Hello world trouble. Caesar cipher segmentation fault and encipher the plaintext
isupper() does not work on strings, it only works on chars, that's why you get the seg fault.
"I did not find anything that helped to iterate over the chars of p. Can you give me a hint on how to do ...
- 162
3
votes
PSET5: Why is my code working without fully implemented Unload function
Totally awesome that you are asking the question even though it passed check50! Kudos.
Notice this line Usage: speller [dictionary] text in the valgrind report. Speller didn't really run. You called ...
- 27.8k
3
votes
Accepted
pset5 speller works, check50 fails, segfault with small dictionary
Think about what's happening. When using the full dictionary, there are words for every letter of the alphabet. Since your hashmax is 32, there's also a really good chance that every possible hash ...
- 68.2k
3
votes
Accepted
pset7 finance check50 invalid purchase
One way to test is to add a hard-coded value to lookup (in helpers.py) that has the condition you need.
Near the top, put this:
if symbol == "ABC":
return {"name": "ABC test","price": 14....
- 18.6k
3
votes
Accepted
pset7 finance check50 doesn't detect a valid sale despite portfolio updating correctly
As suggested in a comment, add this to the top of your lookup function in helpers.py
if symbol == "AAAA":
return {"name": "Test A", "price": 28.00, "symbol": "AAAA"}
and then, with a fresh ...
- 18.6k
3
votes
Accepted
Pset1: Problem: expected “##\n”, not “ ##\n”
Your own question hides the answer, carefully observe the difference:
"##\n" " ##\n"
There is a space that should not be there, the hashtag must be perfectly aligned to the left. Your program is ...
- 5,159
3
votes
Accepted
check50 not approving my code but it looks like it's working
The good news is: it looks like your ciphering algorithm is working. Yay. The bad news is you missed a important detail in the spec.
Notice the difference between what cs50 is expecting: "ciphertext:...
- 27.8k
3
votes
Mario pyramid works, but check50 not buying it
This is a fairly common misinterpretation of the spec. The pyramid should print out so that there are no leading spaces on the last line, no matter how high the pyramid is.
This code prints too many ...
- 68.2k
2
votes
Accepted
pset5 - possessives and substrings
Actually, your problem is a lot more severe than it appears. You are getting a massive number of false positives. I say that they're false because you're not actually checking the words correctly. So ...
- 68.2k
2
votes
Accepted
check50 error in vigenere with baz and Hax0r2 argv
check50 has no bugs.
Your sandbox results show only one error 'szz' rather than 'rby' inside this string
Expecting the following on standard out — xoqmd, rby gflkp!\n ... but received the ...
- 18.6k
2
votes
Accepted
Help! pset1 - mario.c - "illegal file in check" when using check50
You have a typo.
check50 2014.fall.pset1.mario. mario.c
You see that extra stray period between mario and mario.c? That's what is causing the problem. Lose it. ;-)
If this answers your question, ...
- 68.2k
2
votes
Accepted
pset4 - Recover - doesn't pass check50 but works
It's interesting that you get 50 files, but something is amiss. Look at your test for signatures:
if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && buffer[3] &...
- 68.2k
2
votes
Accepted
pset4 recover: last image not recovered correctly
The problem is that you check for EOF before reading new data. You need to do the read and then check for EOF. Remember, after the last word is read, the file pointer is positioned to detect the EOF ...
- 68.2k
2
votes
Accepted
Doesn't pass the last test
check50 actually uses a different data set for testing, so it is working correctly. (Sneaky of them, isn't it? ;-) It's because of a series of issues over time and is a long story. )
As for not ...
- 68.2k
Only top scored, non community-wiki answers of a minimum length are eligible