Questions tagged [find]
The find tag has no usage guidance.
189 questions
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Pset3 Sorting Help a bit of out of the scope
I was doing the sorting part and was having trouble in figuring out what file to compile as to check if my code is correct for bubble sort or not. So started searching here and someone posted here ...
0
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1
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51
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What file am I suppose to compile to see my output in Pset3 Sorting?
Ok this is the code for sorting I have written but now I don't know what file to compile to check for my results. Because of the addition of printf() function I have added stdio.h into my helpers.c ...
0
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1
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35
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find.c does some things which are not written in itself
In the find.c there is nothing like printf ("Retry: ") if user fails to insert a number, but it does. In the explanation of problem set it also states ctlr-d will cause to straw==INT_MAX and should ...
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0
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1
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42
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Array Initialization Problems
I am getting this error from my code:
helpers.c:56:28: error: expected expression
binsearch(value, values[], j, n, end);
Here is the code in question:
binsearch(value, values[], j, n, end);
...
- 57
0
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1
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450
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Find.c doesn't do anything
So I've been struggling with this for some time now and now I feel I'm totally stuck. I'm done with selection sort and binary search in helpers.c, and I think they are working all right. Actually for ...
0
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1
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148
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find will not compile
find will not compile with or without ; at the end of the statement void sort(int values[], int n).
Clang errors and my helpers file are given below.
Error message with ;
jharvard@appliance (~/...
- 199
0
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1
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223
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Help on helpers! pset 3 - can't find the error!
everyone, i'm stuck on find/generate files, i think i wrote the right code but, the program can't find the needle, can anybody helpe me, please ?
0
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1
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243
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pset3-helpers-expected expression
I am getting the following error when I compile my helpers file
jharvard@appliance (~/Dropbox/pset3/find): make helpers
clang -ggdb3 -O0 -std=c99 -Wall -Werror helpers.c -lcs50 -lm -o helpers
...
- 199
1
vote
1
answer
236
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expected output not standard error
In pset3's find. I have implemented Binary search. Everything works fine when I test it. But when I test it with check50, the last test fails saying: \ expected output, not standard error of "/opt/...
- 165
0
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0
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151
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pset3 - check50 for find returns frowny face
I must be missing something on my code for pset3.
When i run the Check50 i get this messages :
:) finds 42 in {41,42,43}
:( finds 42 in {40,41,42}
\ expected an exit code of 0, not 1
After ...
- 1
0
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0
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91
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My linear search can't find any values. Why?
Here's the code for my pset 3, which fails to find the '127' in the stack. Any hints will be massively appreciated:
bool search(int value, int values[], int n)
{
for(int i = 0; i < n; i++)
...
- 31
0
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1
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46
views
Find Search Help (improved)
For pset3's findsearch, i saved the this code
#include "helpers.h"
bool search(int value, int values[], int n)
{
// removed implementation due to academic honesty rules
}
in helpers.c and ...
- 61
1
vote
1
answer
1k
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How to use swap?
I am currently in pset3, implementing sort. I chose to do selection sort and at the end of it I need to swap the numbers, but when I try to compile, I get this message:
implicit declaration of ...
0
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2
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139
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why does my find get stuck?
When I do the ./generate 1000 50 | ./find 127 command, the answer is
so that is the right answer.
But when I do the ./generate 1000 50 | ./find 128 command, the answer is
and nothing ...
0
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0
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76
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Valgrind Error on Find
I know it's not required to run valgrind on find in pset3, but I was seeing some funky things in check50 and tried it out. The following errors appear:
==7866== 1 errors in context 1 of 2:
==7866== ...
user2137
0
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1
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134
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pset3 find.c - error whenever code is compiled
The error is as follows:
Even looked at the stddef.h file but unable to figure out anything.
The code is as follows:
1
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2
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18k
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pset 3 GDB: "no executable file specified"
I've been working my way through CS50 and I'm having a problem I hope someone can help me with. I can't get GDB to function at all, and I think it might be a problem with startup - when I type "gdb" ...
- 13
0
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1
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479
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helpers.c not exist
When I used check50, show this bug... I understand that "helpers.c" is not compile, but in MakeFile all looks good. I'm in the step of binary search and sort.
What can I do to find the error?
...
0
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1
answer
182
views
pset3 find - gdb with generate as pipe
I am on binary search in pset3 find. As noted here, I get an crash when I try to run it through a pipe to generate with more than 580 numbers to generate with seed of 50. So command (note that it is ...
- 146
0
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245
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pset3 find: Bus error (core dumped)
I finished the binary search algorithm and I get an error Bus error (core dumped) when I try to test it using the generate tool which is given. However, it works fine when I input the haystacks myself....
- 146
0
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1
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260
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result of search function ignored by find.c
for negative results ,its O.K.
0 , 1 , 2 , 3 , 4 , 4 , 5 , 6 , 7 , 7 , 8 , 9 , 11 , 22 , 33 , 66 , 78 , 88 , 455 , 999 ,
lower =0 ,upper = 19 ,mid = 9 ,values[mid] = 7
lower =10 ,upper = 19 ,mid = ...
- 23
0
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2
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302
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find.c Compiling in my machine but not while doing check50
My code for find.c is working fine. I checked with other examples other than on the problem set. I implemented binary search using recursion and changed the search function to include beginning and ...
- 121
0
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2
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3k
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Pset 3 - Find and Helper.C
Question about find and helpers.c. When I run check50 on my code, I get the following error below:
:( doesn't find 42 in {39,40,41}
\ expected an exit code of 1, not 0
:( doesn't find 42 in {39,...
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0
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0
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135
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I can't get search to work when value == value[n]
I'm trying to implement a recursive binary search in helpers.c. When checking my code with check50, everything works except:
:( finds 42 in {40,41,42}
:( finds 42 in {39,40,41,42}
So obviously ...
- 13
0
votes
2
answers
170
views
Selection sort does not sort the unsorted portion once no swapping position is reached?
I've been struggling with this bug for almost 2 days, but so far no success.
If anyone could point out what is wrong with my code, I would appreciate it very much.
Using my own random numbers (100, ...
- 29
2
votes
1
answer
170
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Pset3 search: can't seem to find the last number
Everything else in check50 works, but my program can't find 42 in {40, 41, 42} and {39, 40, 41, 42}.
I don't think it's sort's fault, and I've implemented search in the correct way (I think, at ...
- 33
4
votes
1
answer
532
views
pset3 find INT_MAX
In find.c, there's a conditional that references a constant called "INT_MAX". I looked through all the pset files and couldn't find any reference to this constant. What is it, what does it represent,...
- 352
2
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1
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1k
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How does find.c know to use functions from helpers.c?
I've been beating my head trying to understand the second assignment for pset 3. It states in part:
Notice that find.c calls search, a function declared in helpers.h.
Unfortunately, we forgot to ...
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0
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1
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154
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pset3 find.c corner case
I made a for loop for searching and sorting in the header file. Both loops start off like this:
for (int i = 0; i < n ; i++)
find.c compiles fine for me but when I put the needle at the end of ...
- 31
1
vote
1
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380
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How do I check pset3 find?
I think I've finished find.c, but I'm not quite sure how to check it. For example, one of the things it must do is find 42 in {42, 43, 44}, so how do I enter this into the terminal window? Do I use ...
- 15
3
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2
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691
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My pset3 find code completes all tasks using check50, but gradebook says it's wrong
I can't seem to figure out why the CS50x gradebook says that my find code is wrong but when I check the exact same code using check50, I get all smileys.
I did everything as per instructed. I ...
1
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1
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215
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Segmentation fault core dump with find and helpers.c
I have been working on find.c for the last three days, without success. When I run check50, 50% of the time it compiles helpers.c but then does not find 42 as it is supposed to. The other 50% of the ...
- 11
0
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1
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100
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Values found aren't the ones submitted?
I'm working on pset3, and I think I've finished helpers.c. It sorts correctly, and I can't find any mistakes, but it does something really weird. If I enter the values 1, 2, 3, 4, 5 into find.c as hay,...
1
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1
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7k
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What does "error in backend: IO failure on output stream" signify?
I altered the code in helpers.c in such a way that when the difference between the find value and the "haystack" value equals zero the program returns true.
However find will no longer compile and ...
- 41
0
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1
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435
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Pset 3 - find.c is not working
I have compiled find.c, generate.c and helpers.c. When I compile make all, I get the following error message:
jharvard@appliance (~/Dropbox/pset3/find): make all
clang -ggdb3 -O0 -std=c99 -Wall -...
- 1
1
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1
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4k
views
How to Fix "control may reach end of non-void function" and "No such file or directory" Errors?
When I compile find, I get this error message
error: control may reach end of non-void function
When I then try to run the program
./find 14
I get this error message
bash: ./find: No such file ...
- 11
2
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2
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516
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Find.c does not find the value that I put in haystack
For pset3, I have to download pset3.zi and unzip it.
I followed all the steps in the instruction. However, when I get to the program find.c, there's a problem.
The program seems like not working ...
- 25
0
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2
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647
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helpers.c: EOF not working
I have made find.c and coded binary search in helpers.c, so when I run find like
./find 42
and start entering sorted values like
haystack[0] = 42
haystack[1] = 43
haystack[2] = 44
haystack[3] = ...
- 23
2
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3
answers
357
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pset3 FIND: Strange clang error whenever I compile code
I'm coding binary search in helpers.c currently, but I receive a strange clang error every time I try to compile code. I'm absolutely sure my code is logically and syntaxily correct. Where am I going ...
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