Questions tagged [c]
The c tag has no usage guidance.
722
questions
-1
votes
1
answer
12
views
CS50 Week 1 credit card problem set
I am having trouble debugging my code. The logic looks right to me, but whenever I try running credit card test numbers, my code will only sometimes correctly identify the card type.
I have tried ...
1
vote
1
answer
24
views
Psets4 Filter(less) problems, sepia and blur do not work properly :C
Sepia cant filter 3x3 and 4x4, blur cant filter middle pixel as well as 3x3, 4x4 plz help :C
#include "helpers.h"
#include <math.h>
#include <stdio.h>
// Convert image to sepia
...
0
votes
1
answer
14
views
HY GUYS THERE is a problem with my terminal IN CODE.CS50.IO it has no dollar sign in it AND IT IS also not letting me type PLEASE HELP ME
I ALSO TRIED DOWNLOADING VSCODE and connecting it but it just doesnt open and says that it is the old version try downloding the new version of github
but it doesnt download also
0
votes
1
answer
41
views
CS50 Week 1 - Credit Card Checker
Few days later, I was confident that I solved the task, and I was able to clear the number used in the example, and the first number from practice list. I thought everything worked, until I ran it ...
- 3
0
votes
1
answer
26
views
Converting roman numerals to integer
I'm doing some practice with pointers and seemingly basic touchup of these concepts, the task is simple, given 3 pre-entered test cases( strings of roman numerals) convert each to a number and tally ...
0
votes
1
answer
15
views
Why does the variable j in the code is taking the value at 15th iteration?
I was impressed with the class 3 on arrays and I have written the following code in which I've written two initialization, two conditions and one incremental operator on j. It is a buggy logic which ...
- 1
0
votes
0
answers
13
views
stuck on pset 4 filter : blur
// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
RGBTRIPLE copy[height][width];
float Sum_Blue = 0, Sum_Green = 0, Sum_Red = 0, surrounding_pixels = 0;
for ...
0
votes
0
answers
12
views
debug50 not working
I was working on a project in C. When I tried to use debug50, the command failed
bash: debug50: command not found
I am using the usual command: debug50 ./{program-name}
I have already restarted the ...
1
vote
1
answer
12
views
PSet4, Filter-less blurs but gets a lot darker and doesn't match output
I'm having an issue with the blur filter; when working with Duck to understand how to structure my code, I was able to come up with a solution, but the output image was darkened and blurred up until ...
- 13
0
votes
1
answer
9
views
What is the return value of fread when it reads slack space?
This is my code for recover.c in pset4:
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
if (argc != 2)
{
printf("...
0
votes
1
answer
20
views
Speller valgrind test failing
I am working on the speller problem, I got every test except for valgrind to pass.
Here is the valgrind error:
running valgrind --show-leak-kinds=all --xml=yes --xml-file=/tmp/tmpbhs1m7v4 -- ./speller ...
0
votes
1
answer
21
views
Week 5: Speller. Hash function segmentation fault
after doing "speller" i got a segmentation fault. after using debug50 i managed to find out it was on the last line of the hash function. Can you please help me understand what is the ...
0
votes
1
answer
14
views
Wk 1 cash assignment
This is the "pset1" cash assignment. When the user input is and odd number except ending with 5, the code doesn't return anything. Other than that, it works well.
-1
votes
2
answers
27
views
Programme fails on freeing memory - Pset 5 (speller)
I have functioning code for Speller (problem set 5), but check50 reports a memory leak from the line table[i] = n;
Compilation fails when trying to free the node in the unload function:
bool unload(...
0
votes
0
answers
23
views
Pset4: Check50 is not compiling my code for Filter-More
I tested my code and all functions seem to be working fine, I don't know what else to do.
This is the output from check50, there are no warnings or hints about what I might be doing wrong.
https://...
- 1
1
vote
0
answers
21
views
Tideman: Is my thinking correct for sort_pairs and lock_pairs?
I have just finished tideman and passed all checks on check50. However, I wanted to check if my thinking for my code is on the right track, or I got here just by luck.
Firstly, for sort pairs, this is ...
- 11
0
votes
1
answer
30
views
pset 2 readability problem help
In my program, the wordCount isn't always accurate and I can't for the life of me figure out why the phrase "lets go for a run.I like daffodils" in this order equals 7 words, when it's ...
3
votes
2
answers
48
views
Why can you say the name of an array is a pointer to the first element of the array in C?
I have tried to understand why you can say the name of an array is a pointer to its first element in C. Could you please tell me if my understanding below is correct?
Both the name of an array and the ...
- 69
0
votes
2
answers
46
views
PSET 5 - Speller: Compiles locally, check50 says it doesn't
I know this is one of the most frequently asked questions here, since I' ve spent more than an hour reading posts by people that faced similar problems. But still, I can't tell what's going on in my ...
-1
votes
1
answer
171
views
Error: format specifies type 'char *' but the argument has type 'char **' [-Wformat]
I am learning C and I am stuck on this, probably because I am dumb but idk
#include <stdio.h>
int main()
{
char name[25];
int age;
printf("whats your ...
1
vote
1
answer
18
views
pset1 cash compiles but gives unexpected outputs
I'm having trouble figuring out why I'm getting the outputs that I am. I tried to write a function that I can re-use for each denomination of coin, not sure if the problem is there or somewhere else. ...
- 11
0
votes
1
answer
24
views
Can someone help me understand why we multiply the quarters by 25
// Subtract the value of those quarters from cents
cents = cents - (quarters * 25);
- 1
-2
votes
1
answer
24
views
I am so so so new to this and I want to learn, I know my question dumb but I cant see why my code is returning, can you guys help me pls? Thank you! [closed]
I am so so so new to this and I want to learn, I know my question dumb but I cant see why my code is returning, can you guys help me pls? Thank you!
0
votes
0
answers
37
views
problem with speller problem set 5 code
well i have a problem with speller problem set 5 code. For some reason check50 returns everything wrong but when i debug it seems fine. I don't really know what the problem with my code is. This is my ...
- 1
1
vote
1
answer
62
views
Problem Set 4 - Recover (timed out while waiting for program to exit)
After spending almost a week working on the code for the Recover exercise, I have finally made it work. However, when I check with check50, I get the error: :( program is free of memory errors
timed ...
0
votes
1
answer
10
views
scrabble pset: not handling non letter charcters even after iteration with isalpha
hi please the my scrabble pset is not handling non letter characters correctly even after i iterate over every character and con constantly checking if the character is a letter or not with alpha but ...
2
votes
2
answers
49
views
How to properly free memory in the following W3Schools c programming code demonstrating Queue Implementation using Linked Lists
I am taking CS50x I am currently on week 5 DataStructures. I am also in the process of going through the W3Schools tutorial on DataStructures for extra practice and to get a better understanding of ...
0
votes
1
answer
63
views
my Pset 2 Readability is getting the wrong grade level
What am I doing wrong?!
When I check my code with check50, I get this:
:( handles questions in passage
expected "Grade 2\n", not "Grade 3\n"
So far, I haven't been able to fix ...
- 1
0
votes
2
answers
18
views
Why is my code not compiling (simple get_int example)?
I just started this course. I think I am copying exact code from David and in his screen it works but not in mine. What's the issue?.
actual code:
#include<cs50.h>
#include<stdio.h>
int ...
0
votes
1
answer
27
views
Problem set 2, substitution -> I don't get why check50 shows that my output is incorrect
#include <cs50.h>
#include <ctype.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
string cipherText(string key, string text);
bool checkKey(string key);
int ...
- 1
1
vote
1
answer
15
views
Filter-more edge blue channel
When I run check 50 I get the red green channels correct but no matter what I do the blue channel comes out with seemingly random values what am I missing here?
void edges(int height, int width, ...
- 15
0
votes
0
answers
21
views
My cs50 prset2 caesar project rfused to compile,
My cs50 pset2 caesar project refused to compile, what could be the problem. Says can't run until frown turn upside down.
1
vote
1
answer
56
views
Are boolean variables left uninitialized true or false?
I have a question about why something is being done in the provided stub code for Tideman.
here bool locked[MAX][MAX] is left uninitialized early in the program when it is declared. Later every ...
- 69
1
vote
1
answer
55
views
PSET 2 Caesar : help part 3 : ciphertext rotating correctly but not printing out
*Edited to include the latest changes in the code.
Can someone help me spot the problem with my code? Below are the results from check50 and the code itself. TIA!!
Here is the prior question: PSET 2 ...
- 41
0
votes
1
answer
32
views
PSET 4 filter-less problem
I'm confused about the reason I can't pass this test, if anyone can notice what's the cause I would be grateful :)
here is the log :
:( blur correctly filters 3x3 image
Expected Output:
70 85 95
80 ...
- 11
1
vote
1
answer
55
views
PSET 2 Caesar : help debugging caesar : continued #2
I'm looking for some (more) help trying to figure out caesar. I finally got it to compile but it's not working properly. When I run check50, it looks like there are two main issues -
one, it's not ...
- 41
1
vote
1
answer
61
views
Please help debug linear search program in C
Could you please help me debug a linear search program I wrote in C?
The do while loop seems to be executed only once without looping and, as a result, the program does not print the largest int as I ...
- 69
1
vote
2
answers
89
views
Problem With Check50 for problem set "Credit"
I'm currently working on week 6 python and the problem sets are the same to that of pset 1 just with python instead of C. So when I decided to write it I saw that my code in C was extremely bad so I ...
- 13
1
vote
1
answer
19
views
Get a MISSPELLED WORD memory error from check50 PSET5
I've gone through other threads but can't find what the problem is. I don't see any errors when I run valgrind but when running check50 for PSET5 get the following error:
Cause
Did not find "...
- 13
0
votes
1
answer
22
views
How to get value of variable after a loop
Here is my code to count the sum of 5 and 1 coin of a certain money to be the less. But I have to assign variable c to variable v because if not do so, the program will stop if the money is less than ...
- 1
1
vote
1
answer
39
views
CS50x PSET1 Credit <class 'pexpect.exceptions.EOF'>
So regarding Pset 1 Credit, I'm having this issue with Check50
My code identifies the card, but there's some error when input given at shorter length:
My code are the following:
#include <cs50.h&...
- 11
1
vote
1
answer
25
views
PSET 5 Speller fails memory check
This is the full code:
#include <ctype.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h&...
- 27
2
votes
3
answers
39
views
Plurality - Test does not pass for the case of Bob
I'm trying to run check50 on plurality and I can pass all the tests except for the case of Bob where Bob's name is not printed.
:( print_winner identifies Bob as winner of election
expected "...
1
vote
2
answers
32
views
PSET 5 speller fails when solving a memory issue
Ok so when I compile the commented out part, check50 fails most of my criteria! But if I remove it, the program works but Valgrind has a frown. But when i run valgrind without the commented code, it ...
- 27
0
votes
1
answer
20
views
PSET 5 speller segmentation fault when trying to run
Code compiles, but when I try to run it there's a segmentation fault. Aaand I got all frowns on check50.
#include <ctype.h>
#include <stdbool.h>
#include <stdint.h>
#include <...
- 27
1
vote
1
answer
31
views
Changing the size of an array
Overall goal statement :
Your goal is to create a function that removes the first and last
characters of a string. You're given one parameter, the original
string. You don't have to worry with ...
- 23
1
vote
1
answer
48
views
Problem Set 2, Ceasar, Testing Check50
I tried the Caesar Problem. Everything is going well, except when I want to test it. It shows that my output and the test output are the same, but my code couldn't pass the test. Even though I checked ...
- 13
0
votes
2
answers
172
views
CS50 Week 1 Cash Problem question
EDIT - I changed a few things, and now I'm getting the error message below for line 49. Still needing some assistance to understand! I pasted the entire code below.
I'm working on CS50 Problem Set 1, ...
- 41
1
vote
2
answers
121
views
Problem Set 2 (Scrabble) / Variable Scope
Could you please help me find out about variable scope?
Below is a program for the CS50 Scrabble assignment.
I initialized score1 = 0, score2 = 0 atop. I thought since they are global variables, when ...
- 69
0
votes
1
answer
15
views
Program return always true and I don't understand why
Problem propose:
#include <cs50.h>
#include <stdio.h>
bool triangle(int x, int y, int z);
int main(void)
{
int x;
int y;
int z;
do
{
x = get_int("Enter ...
- 17