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141 views

CS50 AP: Pennies

I'm wondering why a lot of my answers are off by 0.01 or a very small amount. Here are the results from check50: :) pennies.c exists :) pennies.c compiles :( 28 days, 1 penny on day one yields $...
0 votes
1 answer
23 views

Not able to access CS50 sandbox

I am not finding the link that directs me to CS50 sandbox. So, I am using the CS50 IDE. But when I am submitting the assignment in CS50 IDE the score is not getting updated. What should I do??
0 votes
1 answer
24 views

CS50 Recover outputs random symbols instead of JPEGS

I am working on pset4 recover in CS50 and I think I am almost done it. The files that it outputs though appear as a bunch of random symbols instead of a jpeg, I'm not sure why this is occurring but ...
0 votes
1 answer
30 views

Why does the strcmp() give 17 instead of 0 between the second characters of dave and baca

int main(void) { int i; char* kw = get_string(Enter keyword: \n"); char* plntext = get_string(Enter plaintext: \n); for(i = 0;i < strlen(kw); i++) { printf("%s, ", kw[i])...
0 votes
1 answer
125 views

Pset 3 helpers.c check 50 errors

#include <cs50.h> #include <stdio.h> #include "helpers.h" //TODO binearysearch, om te controlere van de waarde. bool search(int value, int values[], int n) { int left = 0; int ...
0 votes
1 answer
153 views

so im working on skittles pset and

skittles.c:6:1: error: expected identifier or '(' { ^ this is my error and this is my uncleaned up code #include <stdio.h> #include <cs50.h> int main(void); { int tries = (0); int ...
0 votes
1 answer
100 views

Google Maps doesn't show map after cache cleared

While slowly implementing the solution for pset8, i wanted to check if the typeahead function was working well. It did not, and in some post i read that clearing the cache could just solve the problem....
1 vote
1 answer
147 views

when Will i still get the honor-code certificate?

i completed my cs50 course.Took Cs50 and had the following grades on my psets 1, 0.67, 1, 0.11, 1, 1, 1, 1 , 1, 1. when i will get the honor code certificate?
0 votes
1 answer
226 views

Unable to submit problem set 0 on edX

When I click the submit link, it takes me to the Week's 0 video short on Scratch. Where I can submit it?
0 votes
2 answers
499 views

Questions regarding Pset1 water.c

Hi so I figured out the water.c problem but aside from the requirements, I want the user to input the positive number only (the program will keep asking the user to input "Minutes: " again and again ...
0 votes
1 answer
22 views

How to solve "error: expected expression" while doing Caesar.c

I'm trying to solve Caesar but i keep getting this error: caesar.c:37:20: error: expected expression s[i] = char(int(text[i]+k-97)%26+97); \\ the arrow points to the 'c' in char #include <ctype.h&...
0 votes
1 answer
94 views

Credit card problem: Unable to calculate the sum of entered credit card no

#include <stdio.h> #include <cs50.h> int main(void) { long creditcardno; do { creditcardno = get_long("enter"); } while (creditcardno < 1000000000000 || creditcardno > ...
0 votes
0 answers
67 views

My Filter program is not blurring the image correctly. And it is not able to open the input file. It shows it as NULL

Here is my code: #include"helpers.h" #include<math.h> #include<stdio.h> #include<stdlib.h> // Convert image to grayscale void grayscale(int height, int width, RGBTRIPLE ...
1 vote
1 answer
684 views

CS50 pset2 substitution - timed out while waiting for program to exit

I tried all the provided examples on the pset2 site, and I got all of them correct. But when I used check50 to check my code, it said: "timed out while waiting for program to exit" for some ...
0 votes
0 answers
37 views

My DNA program is showing me this error repeatedly

The error is written below: Traceback (most recent call last): File "/home/ubuntu/pset/pset6/dna/dna.py", line 54, in <module> main() File "/home/ubuntu/pset/pset6/dna/dna....
0 votes
1 answer
53 views

credit pset1 bruteforcing doesn't work

I was trying out credit and tried to write a code for all 15 digit cards so if a AMEX card exists it should work in theory. However even with valid cards I'm getting the input invalid. I have not ...
0 votes
0 answers
56 views

Skipping More Comfortable psets

People who have completed the psets how often did you skip the more comfortable psets and did you complete them all before submitting the course and if not did you miss out on stuff due to that?
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0 answers
98 views

Private cs50 Repository

Whenever I submit the psets they are added to a private repository in my Github account. After I complete the course will I be able to make them public too? Is it a good idea to add a readme file ...
0 votes
1 answer
30 views

Segmentation Error while Using if Statement for Pset2 Caesar

I have been working on Caesar for some time now and tried to use different loops but I am getting Segmentation Errors. #include <stdio.h> #include <cs50.h> #include <stdlib.h> #...
0 votes
1 answer
21 views

check50 on recover pset 4 saying this what am i doing wrong

:) recover.c exists. :) recover.c compiles. :( handles lack of forensic image expected exit code 1, not 0 :) recovers 000.jpg correctly :) recovers middle images correctly :) recovers 049.jpg ...
0 votes
1 answer
114 views

PSET 2 Substitution

My question is about a cs50 PSET. The goal is to create some sort of encryption program. From command line arguments there is a key inputted and every key letter should be replaced with the alphabet ...
0 votes
1 answer
101 views

initialization; condition; update in mario.c less comfortable

I am really having a problem with developing the "initialization; condition; update" part of my for loop in my mario (less comfortable) code could anyone help me with understanding what to input
0 votes
2 answers
59 views

Can't write jpegs in recover, segmentation fault

here's the code i wrote: #include <stdio.h> #include <stdint.h> #include <stdlib.h> typedef uint8_t BYTE; //take command line argument from the user for the file name int main(int ...
0 votes
1 answer
897 views

Problem Set 6 - DNA (Using the DictReader function)

Currently my code functions in so far that I get the appropriate results for the maximum STR counts when I pass a certain sequence. However, I have no clue as to what I should do to progress; I tried ...
0 votes
1 answer
275 views

Problem Set 4 - Filter (Blur)

I know its pretty lame and uninspired to hard-code each and every special case of the blur function, but somehow it still refuses to pass most of check50's tests (aside from the middle and edge pixel ...
0 votes
0 answers
41 views

stuck on pset 8 finance [duplicate]

I have an error in set 8 finance. It says :( buy handles valid purchase expected to find "112.00" in page, but it wasn't found sending POST request to /login sending POST request to /buy ...
0 votes
0 answers
27 views

Why CS50 2019 excluded MashUp problem set?

everyone I have noticed that staff solution for MashUp problem set is not working correctly , displaying same articles for any location in USA and having waterMark ( "for development purposes only")....
0 votes
1 answer
393 views

PSet 2: Caesar, validating key

I'm struggling with the output to the "Validating Caesar's Key" part of PSet 2. First-timer here, like many, and appreciative of any insight. When I compile and then run this program with "./caesar 2",...
0 votes
1 answer
37 views

Resize compliling but gives me grey and white blocks lol!

I don't know what went went wrong! I'd understand if it was giving me coloured blocks and it's messed up in some order but it's just white and grey? #include <stdio.h> #include <stdlib.h> ...
0 votes
1 answer
828 views

Pset 1: Cash help

I've put together my answer for the cash problem set, but when I run the program and enter an amount for "change owed" it always outputs 1. Being new to all of this, I'm not sure what I'm doing wrong ...
0 votes
1 answer
51 views

Check50 has Blank Output

I am trying to run check50 on my code, but it does not return anything; the output is blank, and it only returns a link to a check on https://cs50.me. Anyone know how to fix this problem
0 votes
1 answer
100 views

I need help with cash - again

Ok so this is my improved code: #include <stdio.h> #include <cs50.h> #include <math.h> int main (void) { float c; int a, n=0; do { c = get_float("Change: "); } while (...
1 vote
1 answer
276 views

This should be right (Caesar)

After spending pretty much a whole day on this, I have gotten it to work fine, it does all that was demanded but when submitted, I am still getting 1/5 on correctness. :( someone tell me if I left ...
0 votes
1 answer
35 views

music pset - semantic error

I implemented the music program in pc and I omitted the cs50.h library since I work offline most of the time. Everything's fine actually my code did not give me error messages and it compiled ...
3 votes
2 answers
169 views

Which loop can be replaced for nested for loops for PSET 1 (Mario More Comfortable)?

According to the cs50 style guide for C, more than 3 variables for iteration is not a good practice. I have done Pset 1 (Mario more comfortable) with 5 for loops, so it has 5 iterations variables. Is ...
0 votes
1 answer
263 views

Submissions via check50 does not appear on cs50.me

I have submitted my problem sets via check50 as instructed, but when I go onto my cs50.me page and check my scores, it says "No Submissions" next to each problem set. I have already linked my edx ...
0 votes
1 answer
326 views

Handlebars.compile() not behaving as expected

I am trying to use handlebars.compile() to generate my HTML unordered list items in my getJSON() callback function: function addMarker(place) { ... // add event listener to open info window ...
0 votes
1 answer
92 views

pset 4 resize please help

//CREATE A PROGRAM TO RESIZE A BITMAP FILE //include C libraries #include <stdio.h> #include <stdlib.h> #include <math.h> #include "bmp.h" int main(int argc, char* argv[]) { //...
0 votes
1 answer
253 views

pset1 cash.c Do While loop executing even when condition = false?

I am inputting 0.26 into cash.c, and after the first do while loop in my program, f = 0.00999999046 My second do while loop condition is f >= 0.10, yet it is executed even though f is less than that. ...
0 votes
1 answer
93 views

CS50 Pset 4/Recover-retains 50 broken JPEGs

My code compiles/executes and retains 50 JPEGs, however, these JPEGs are broken, I have gone through my code many of times, have discarded other versions, I seem to be missing something I can't spot ...
0 votes
1 answer
134 views

imprecision problem cs50 greedy

#include < cs50.h > #include < stdio.h > int main(void) { float change; int quarter = 25; int dime = 10; int nickel = 5; int penny = 1; int counter = 0; int c ...
0 votes
1 answer
95 views

CS50 is great but I need some help

I like the course, it's for me the best CS course online but I need some resources. The Psets are getting a little hard to solve. I need some help with the C language in general to think more ...
0 votes
1 answer
37 views

Trying to use functions to modify pset2 Caesar characters, get error: expression result unused for each function

So I'm working on pset2's Caesar and wanted decided it would be better to put the algorithm into functions, with each function operating based on whether a character is uppercase or lowercase. Now ...
1 vote
1 answer
6k views

CS50 IDE undefined reference to `get_int'

I've created a new workspace on cloud9, and ran update50 as suggested in the answer to this similar question: Undefined reference to get_int However, I still receive the exception 'undefined ...
0 votes
1 answer
294 views

Blank jpegs pset 4 recover

#include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <cs50.h> int main(int argc,char *argv[]) { if (argc != 2) { fprintf(stderr, "usage: ./recover ...
0 votes
1 answer
54 views

any one having trouble opening Pset links

Have not been able to open any of Pset links, able to watch videos of lectures and shorts! any thoughts? Thanks
1 vote
3 answers
2k views

Can I skip Scratch Problem Set ?

I've started taking the course, but I can't edit the code in Scartch editor, it crashes and tells me it will notify MIT. Can I skip this pset and go to the next one ?
0 votes
1 answer
172 views

Pset5: Check returns all as misspelled (trie)

I can't, for the life of me, figure out why my check function doesn't work properly. I have triple-checked my load() every way I know how and believe the data structure is properly setup. Why doesn't ...
0 votes
2 answers
4k views

No such file or directory, pset1

I have exercise 1 of pset1 ready to go. However, I seem unable to compile the program. I follow the below steps (in fact, I deleted everything and created it from scratch): Create New Folder, name it ...
0 votes
1 answer
84 views

pset2 Caesar, not able to print chypertext text

I'm trying to solve the Caesar problem. if you look at my code, I tried to iterate through the "plaintext" value with a for loop. My aim was at every alphabetical character to apply the chypher ...