Questions tagged [pset5]
The problem set for Week 5 will challenge you to apply what you've learned about pointers, memory management, file i/o and structs, creating more complex data structures (such as Hash Tables or Tries) and leveraging their power to write a lightning-fast spell check algorithm.
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questions
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Pset 5- Output is correct but still cant pass check50
I am currently working on Pset5, Speller. My output seems to be identical with cs50's solution (mine is simply way slower), but I still can't pass check50, it simply shows a blank window for my output....
0
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2answers
19 views
Segmentation Fault on Speller's Load function
bool load(const char *dictionary)
{
FILE *dict = fopen(dictionary, "r");
if (dict == NULL)
{
return false;
}
char word[LENGTH + 1];
while (fscanf(dict, "%s&...
0
votes
2answers
21 views
Problem freeing memory in Speller hash function
I have a problem to free the memory for the variable lowercaseword, I try to do it above the return statement with free(lowercaseword), but then the program stops working and I get errors on check50. ...
0
votes
1answer
17 views
cs50 pset5 functions check load assistance required
I have reached an impasse with regards to this exercise.
I believe that I have written the load function and it works.
I also believe that the hash function works
I think the size function returns a ...
0
votes
1answer
17 views
PSET5 Load function leaking memory
I'm having a problem with memory leak, when I use Valgrind it tells me that I have 512bytes of memory leaked, I know the problem is with load because of Valgrind and because my load functions is ...
0
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1answer
22 views
(Speller) Search Function returns each word given as false, And when i run Small Dictionary gives me Segmentation Fault
// Implements a dictionary's functionality
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#...
0
votes
1answer
23 views
Pset5 Speller Valgrind error trouble
Baby programmer over here. Before moving on to the (check) function, I wanted to make sure the (load) function was correct.
After performing Valgrind, I received the following errors. Up to this point,...
0
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1answer
28 views
“Could not unload” error in pset4 speller
I am solving speller pset5. In check50 my code is wrong. Don't know why. dictionary.c:// Implements a dictionary's functionality
#include <stdbool.h>
#include <strings.h>
#include <...
0
votes
1answer
37 views
Word array sometimes filled with weird values - Speller
My code looks like this: (ignore the comments; they're old)
// Implements a dictionary's functionality
#include <stdbool.h>
#include <string.h>
#include "dictionary.h"
#include &...
0
votes
1answer
15 views
The strcsecmp() function is not working as expected
I am currently trying to solve pset5, speller. I managed to write every funtion correctly except of the check() function.
This is the check() function I wrote so far:
// Returns true if word is in ...
0
votes
1answer
23 views
Hash Function in Speller - Use of Undeclared Identifier Error
I'm stuck on the speller assignment but it feels like the smallest thing to be stuck on....in my hash function I keep getting "use of undeclared identifier" for n and i. Usually if this ...
0
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1answer
24 views
Pset5: check returns hashtable pointers as NULL despite hashtable values printed correctly in load
My check function returns all hashtable indexes as NULL (I printed a known index of 124 and still returns NULL), despite all indexes printed correctly in load. I am not sure where exactly the problem ...
0
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1answer
23 views
When declaring an array of pointers that will be a hash table, do you have to set all the elements of the array to NULL?
In the distribution code for Speller in pset5, they include this line in dictionary.c
// Hash table
node *table[N];
Should I set every element in the array to NULL, because they are pointers? (the ...
0
votes
1answer
33 views
Struggling with PSET5 Speller valgrind problems (& possibly more)
I've been working on PSET5 for weeks now on & off and I'm becoming really frustrated. I think I'm lacking some understanding of the malloc/free relationship, I'm not sure. Here's all of my code. ...
0
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1answer
20 views
pset5 speller check function: cursor pointer keeps being NULL
I finished writing the code and tried to run the program, but it returned all words as misspelled.
When I ran debug50 on the check function, it shows that the cursor pointer does not take the value of ...
0
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1answer
18 views
Trying to fix a segfault in unload , pset5, speller
So when I originally wrote my code for the dictionary.c, I forgot to create the header nodes for each 'bucket' in the hash table. It ran well when every first node of each linked list had a letter, ...
0
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0answers
16 views
trouble loading dictionary
my load function seems to only load two words and all words are coming back misspelled. I don't know if the problem is with my load function or the hash function. I've gone over the load function ...
0
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1answer
26 views
Speller skips last word in testfile I use
The title speaks for itself, but here is a bit more in-depth explanation. While my check() function runs, it always skips the last word in whatever file it is checking out. The source code for my ...
0
votes
1answer
14 views
My load function is licking memory
the program complies properly but when i use valgrind shows am leaking memory when I open the file in the FILE *file = fopen(dictionary, "r");
bool load(const char *dictionary)
{
// TODO
...
0
votes
1answer
29 views
CS50 Speller Not Free of Memory Errors
When I run check50 on my code, valgrind says:
Conditional jump or move depends on uninitialised value(s): (file: dictionary.c, line: 34)
112 bytes in 2 blocks are still reachable in loss record 1 of 1:...
0
votes
2answers
39 views
Segmentation fault error in pset5
I did the speller and had some errors that I solved, but now I'm stuck and need help.
I debug the load and hash (I know it's not ideal, but it works:))
Now I'm receiving the Segmentation fault error ...
0
votes
1answer
36 views
pset5 speller check50 error - code doens`t handle max length (45char)
i get this error from check50 and i can t figure out why...:
:( handles max length (45-char) words
expected "MISSPELLED WOR...", not "MISSPELLED WOR..."
everything else is green (...
0
votes
1answer
26 views
speller - unload returns false …?
unload returns false and i am not sure why....
when i run Valgrind i get this:
HEAP SUMMARY:
==7885== in use at exit: 608 bytes in 2 blocks
==7885== total heap usage: 143,096 allocs, 143,094 ...
0
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1answer
45 views
pset5 speller load - i don`t get it
how do i check the logic of this ... i have not yet implemented the hash function ... can i check for errors without doing this or it is impossible to check without the hash function...?
// Loads ...
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1answer
35 views
Pset5 Speller Issues with check and unload functions
I have been stuck on this pset for over a week now. I have already checked other answers to similar questions here but none have been helpful to me. Testing through check50 as well as the debugger I ...
0
votes
1answer
29 views
cs50 speller code complies and run also successfully. but it not qualifying for big board
:) dictionary.c and dictionary.h exist
:) speller compiles
:( qualifies for Big Board
expected exit code 0, not 139
:| passes benchmarking
can't check until a frown turns upside down
how to fix this
*...
0
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0answers
19 views
Pset5: Problem with loading multiple words with the same hash number
I am having problems with loading multiple words with the same hash code. The hash function I chose, from what I can understand, takes the ascii codes of all of the words in the dictionary, and ...
0
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0answers
40 views
CS50 pset5 Speller - Code Does Not Compile Due to Issue with Hash Table/Load Function
I've been working on Speller for a little while now, but I've run into a roadblock. I finished my first draft of speller and have been clearing up errors until this point. Here's my dictionary.c so ...
0
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1answer
22 views
CS50 Pset 5 Speller Can't Handle Substrings
For some reason, when I run check50 cs50/problems/2020/x/speller, it says that my code can't handle substrings, but everything else works. My code recognizes that there are 2 words in the dictionary, ...
0
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1answer
30 views
Can anyone see what is wrong with my check function?
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>
#include <strings.h>
#include "dictionary.h"
int s = ...
0
votes
1answer
19 views
PSET5: Missing Words from Text and Memory Leaks
UPDATE: I just fixed the capitalized spell-checking errors.
UPDATE 2: free didn't totally free the string "caterpillar". Look at image:
My code seems to encounter a weird bug where it does ...
0
votes
1answer
23 views
pset5/speller Check produces a segfault if I introduce hash function
If I have a single bucket, the program runs seamlessly, however when I introduce the djb2 hash function as seen here the program produces a segfault. Here's my code with the hash function commented as ...
0
votes
1answer
27 views
I can't assign a node to a bucket in a hash table with with right assignment of pointer and word values
When I assign table[index3] = n; what happens is that the value of the word receives a memory address and I can't follow table[index]->next to achieve the old n->word; This shouldn't happen.
// ...
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0answers
26 views
code can't handle substring property
// Implements a dictionary's functionality
#include <stdbool.h>
#include "dictionary.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype....
0
votes
1answer
32 views
the misspelled words are more than expected
misspelled words in my code is seemed to be 2678
while the correct number is 955
some words like "and", "but", "a", "an" my code regards them as misspelled ...
0
votes
1answer
43 views
CS50 Pset5 Speller
I am having problems with Pset 5 Speller. I believe, I'm nearly there, I can get all functions to run and compile successfully, however my outputs are not quite right. I have attached comments to make ...
0
votes
1answer
33 views
Pset5 Speller. Treating the letter 's' as a valid word when using large dictionary?
I'm very puzzled my program seems to work correctly apart from one thing, when I run speller with large dictionary, the letter "s" is treated as a correctly-spelled word. I ran a test using ...
0
votes
2answers
51 views
CS50 Speller returns all word as mispelled and I can't find any mistake in my code
I need help, I can't get around this problem set. I have searched everywhere and I think the code is equal to most of the other students... The problem is that the check function is returning true ...
0
votes
1answer
21 views
Pset5 Speller: Conditional Jump or move
I can´t find why valgrind is giving me this message.
**
==3087== Conditional jump or move depends on uninitialised value(s)
Looks like you're trying to use a variable that might not have a value? Take ...
0
votes
1answer
26 views
pset5 speller “Could not load dictionaries/large” error
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "dictionary.h"
#define ...
0
votes
1answer
55 views
Pset5, Speller, output the same as staff, but check50 still showing entirely errors
I'm stuck on Pset5, Speller. My code all compiles correctly, and when run on the Lala Land example, provides the same output as the staff solution (albeit mine runs more slowly). But, check50 still ...
0
votes
0answers
33 views
CS50 Speller valgrind issues and
I'm new to CS and could really use some help on the speller pset. I've got a basic outline that doesn't seem to seg fault, but I'm still having issues. It fails check50 in that:
it doesn't handle ...
0
votes
2answers
46 views
Speller unload function
Hello i am trying for two days now to find my mistake and i just can't find it i would be happy if you help me out with it
Here is my code:
https://pastebin.com/7EGHUsET
I think i have made mistake ...
0
votes
1answer
30 views
recursive function on speller causing a “conditional jump” error on valgrind?
I am trying to implement a recursive subfunction for speller. It works, but when I run check50, I'm told that there is a "Conditional jump or move depends on uninitialised value(s): (file: ...
0
votes
1answer
20 views
pset5 case sensitive check fail
:) dictionary.c, dictionary.h, and Makefile exist
:) speller compiles
:( handles most basic words properly
expected "MISSPELLED WOR...", not "MISSPELLED WOR..."
:) handles min ...
0
votes
1answer
51 views
I dont understand valgrind pset5
Error from valgrind
$ valgrind ./speller texts/cat.txt
==1453== Memcheck, a memory error detector
==1453== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==1453== Using Valgrind-3.13....
3
votes
2answers
83 views
Debug50 is not functioning properly
I was using debug50 over and over for pset5 speller and at some point it just stopped working. Now when I try to use it with simple programs it still won't work. I've restarted the ide from inside ...
0
votes
1answer
80 views
Pset5 - Speller - memory leak?
My programme runs and I'm passing all the checks bar the last one.
When I run the check with --log I get this response:
:( program is free of memory errors
valgrind tests failed; rerun with --log ...
0
votes
0answers
27 views
pset5 - Conditional jump or move depends on uninitialised value(s)
Here is my code:
// Implements a dictionary's functionality
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include ...
0
votes
2answers
49 views
Speller program runs accurately with memory leaks. When I add free() to correct memory leak, program stops executing
My speller program runs and produces accurate outputs. It passes all but one of the check50 checks. It fails because it has a memory leak.
I added free() to the load loop where I am allocating ...
