Questions tagged [pset]
The pset tag has no usage guidance.
79
questions
0
votes
0answers
33 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?
0
votes
0answers
23 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
1answer
28 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
1answer
41 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
1answer
14 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
1answer
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
1answer
96 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
2answers
57 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
1answer
723 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
1answer
21 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
1answer
214 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
0answers
37 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
0answers
22 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
1answer
326 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
1answer
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
1answer
641 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
1answer
43 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
1answer
89 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 (...
0
votes
1answer
100 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 $...
1
vote
1answer
219 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
1answer
32 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
2answers
162 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
1answer
245 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
1answer
212 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
1answer
91 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
1answer
22 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
1answer
218 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
1answer
75 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
1answer
123 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
1answer
89 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
1answer
34 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
1answer
4k 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
1answer
119 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
1answer
272 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
1answer
222 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
1answer
171 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
1answer
77 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 ...
0
votes
1answer
100 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
1answer
50 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
0
votes
1answer
995 views
pset2//caesar- relational operator result unused error
my code-->
#include<stdio.h>
#include<cs50.h>
#include<string.h>
#include<ctype.h>
#include<stdlib.h>
int main(int argc, string argv[])
{
if(argc!=2)
...
0
votes
1answer
208 views
problem resizing horizontally
I've started out this problem as bad as it gets :( trying very hard to understand bitmab files and how they work (especially padding) for a few days(as I'm not a native English speaker).
now that I ...
1
vote
2answers
1k views
Set foreign key in phpLiteAdmin
Does anyone know how to set a foreign key using the phpLiteAdmin interface? The docs for this application are lacking, and the recommended syntax for adding a column using SQLite does not appear to ...
0
votes
1answer
103 views
Recover is Producing Corrupt JPEGS
Here's my code. I've got print debugging statements in there. The output seems to indicated that everything is going well, but when I open up the files, they are blank. I inspected the JPEGS with ...
0
votes
1answer
133 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
1answer
733 views
APCS50 Problem: Fahrenheit
ok so im in CS50AP which means for you who dont know mean im in high school so i could use some help with this
right now my code for fahrenheit is:
#include <cs50.h>
#include <stdio.h>
...
0
votes
2answers
498 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
1answer
41 views
PSET 2: Nested IF statement
I'm trying to solve Caesar cypher ploblem from the course by using an if statement inside another if statement (Nested IF statement? apologies if I'm using the term incorrectly.)
My draft attempt in ...
1
vote
1answer
310 views
pset4 Resize - Trouble Understanding Padding
I'm having a hard time understanding pset4's resize. Although I understand the theory, it's difficult for me to turn it into a program.
I do understand that the scan line's total width must be a ...
0
votes
1answer
348 views
pset 3 Binary search
I'm stuck on implementing the binary search function in pset3. I am trying to do the recursion method but I am stuck and have been for hours. It seemed easy enough but I am discovering that it's more ...
0
votes
1answer
80 views
How should I connect to the multiple databases?
I am trying to Merge several psets.
But to do that I think I need to have multiple databases.
My dumbest approach to that problem follows like this
in constants.php
define("DATABASE", "pset7");
...
