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C QUESTIONS

function: findnextchar() doesn't work
function: findnextchar() doesn't work
hope this fix your issue You are always searching from the beginning of the string. Instead, you have to start from a position after your last match.Two changes should do the trick:
TAG : c
Date : November 23 2020, 01:01 AM , By : JGSILVA
Getting file-size property from Nautilus
Getting file-size property from Nautilus
I wish this helpful for you Assuming Evince uses GIO (I failed to find a way to quickly browse its code), you can use e.g. g_file_query_info() to get a GFileInfo pointer.You can then use g_file_info_get_size() to get the size of the file.
TAG : c
Date : November 23 2020, 01:01 AM , By : tomaszg
Forward declare entities in C standard library?
Forward declare entities in C standard library?
This might help you Forward declarations of structs are always permissible in C. However, not very many types can be used this way. For example, you can't use a forward declaration for FILE simply because the tag name of the struct is not specified (
TAG : c
Date : November 23 2020, 01:01 AM , By : Paco Ruiz
Static array in C
Static array in C
this one helps. What you are using is variable length array. Which is supported by C99 and latter. But note that VLA has automatic storage duration unlike dynamic memory allocated by malloc family functions. Also note that compile time allocation is
TAG : c
Date : November 22 2020, 03:03 PM , By : Algenis
Function signature indicates return type void*, but returns pointer of a different type
Function signature indicates return type void*, but returns pointer of a different type
I hope this helps . Why is return freeBlock,which returns type BlockInfo* a valid statement.
TAG : c
Date : November 22 2020, 03:03 PM , By : user2956881
How do I measure time per thread in C?
How do I measure time per thread in C?
To fix this issue You can certainly use gettimeofday inside the thread function itself. Using local (stack) variables is completely thread-safe - every thread runs on its own stack (by definition).
TAG : c
Date : November 22 2020, 10:56 AM , By : user2956703
Online judgeProblem (Wrong Answer)
Online judgeProblem (Wrong Answer)
I wish this helpful for you The original post has mini=0 for all cases, but where the total problems is > 10 that may not work. I have adjusted that
TAG : c
Date : November 22 2020, 10:56 AM , By : user2956671
Use function pointer initialized in other source file
Use function pointer initialized in other source file
it should still fix some issue I have function pointer, that is declared as follows in file 1.h , Check the below changes
TAG : c
Date : November 22 2020, 10:56 AM , By : Mradul06
last line of file is duplicated using fscanf
last line of file is duplicated using fscanf
like below fixes the issue Using feof() like this is wrong.
TAG : c
Date : November 22 2020, 10:56 AM , By : Will Mc
How to print files with same month of modification using directory in c?
How to print files with same month of modification using directory in c?
I think the issue was by ths following , You are closing the directory stream in wrong place. You are closing that in the inner while but you have to close that after the outer while.
TAG : c
Date : November 22 2020, 10:56 AM , By : user2956509
ADT Circular Queue enqueue and dequeue
ADT Circular Queue enqueue and dequeue
wish helps you Let me give you an example :See this image : Enqueue image (I can't post image here due to reputation points, So, giving the link)
TAG : c
Date : November 22 2020, 10:56 AM , By : phee
What events can cause ferror to return non-zero?
What events can cause ferror to return non-zero?
around this issue It is primarily errors returned from the underlying system calls (e.g. read, write, lseek, close) that will cause the stream's error bit to be set.Many f___() functions from stdio.h indicate that if the end-of-file is reached, or an
TAG : c
Date : November 22 2020, 10:56 AM , By : Gary Hau
Accessing dynamically allocated structure received through socket
Accessing dynamically allocated structure received through socket
To fix the issue you can do The send() function prototype is
TAG : c
Date : November 22 2020, 10:54 AM , By : manish
Vim with C Conditional Parsing
Vim with C Conditional Parsing
I think the issue was by ths following , With the ancient ifdef highlighting plugin, you can :Define or :Undefine preprocessor defines, and the corresponding blocks with be highlighted or not. Apart from that, I'll second @FDinoff's comment: Vim is a
TAG : c
Date : November 22 2020, 10:54 AM , By : user2956168
C can pointers be aligned with any other data type?
C can pointers be aligned with any other data type?
will be helpful for those in need The C standard doesn't explicitly guarantee that object pointers have the most stringent alignment requirements. On some systems, long double may have a more stringent alignment requirement; on other systems, functio
TAG : c
Date : November 22 2020, 10:54 AM , By : user2956144
sdcc inline asm() not working
sdcc inline asm() not working
it should still fix some issue Moved from commentIn the sources of SDCC 3.1.0's lexer, I see that both _asm/_endasm and __asm/__endasm are supported. I haven't noticed yet support for __asm("string") in the parser yet.
TAG : c
Date : November 22 2020, 10:54 AM , By : user2956064
I/O - Manipulation of C Strings
I/O - Manipulation of C Strings
I hope this helps . I'd like to iterate through a string (entered by the user), returning the inputted string with an added space after each character (i.e. "Hello" --> "H e l l o ". , Here:
TAG : c
Date : November 22 2020, 10:54 AM , By : user2956061
sscanf 1 byte hex data without overflow
sscanf 1 byte hex data without overflow
it helps some times You want to use %02hhX on an array of unsigned char. (So uint8_t is fine)
TAG : c
Date : November 22 2020, 10:48 AM , By : dimnikolov
Avoid division by zero in C when taking log with respect to a random number
Avoid division by zero in C when taking log with respect to a random number
To fix the issue you can do You just need to make sure that the result of rand() isn't 0 so that you won't have to do the conversion to double and division again and again
TAG : c
Date : November 22 2020, 10:48 AM , By : user2956001
C - memory corruption with threads
C - memory corruption with threads
it should still fix some issue I have a memory corruption that I have no clue what is happening. There is a piece of my code: , Superficially, your problem is:
TAG : c
Date : November 22 2020, 10:48 AM , By : user2955934
Why does my program sometimes returns 0xc0000005 and sometimes runs well?
Why does my program sometimes returns 0xc0000005 and sometimes runs well?
I wish this help you can you tell me why this program sometimes returns 0xc0000005 (crash) and sometimes it runs well? I am beginner in C and have no idea what is wrong. I am using GNU GCC compiler and Code::Blocks. Thank you in advance. , You've cre
TAG : c
Date : November 22 2020, 10:40 AM , By : user2955609
C - Dynamic array handling advice
C - Dynamic array handling advice
seems to work fine Your array_length is O(N). This will lead to quadratic runtimes if you add lots of items in an array, which can be quite slow.What you can so instead is use a struct to store the size of the array
TAG : c
Date : November 22 2020, 10:40 AM , By : lightingCoder
Does Standard define null pointer constant to have all bits set to zero?
Does Standard define null pointer constant to have all bits set to zero?
may help you . No, NULL doesn't have to be all bits zero.N1570 6.3.2.3 Pointers paragraph 3:
TAG : c
Date : November 22 2020, 10:40 AM , By : Dragos
valgrind report strange memory usage
valgrind report strange memory usage
I wish did fix the issue. In the case where PASSES is 100, you have chunk = 10485. The allocations you are doing are
TAG : c
Date : November 22 2020, 10:40 AM , By : yitz..
abs without branching, why this code works
abs without branching, why this code works
wish helps you There are many versions of realizing abs() without branching. I came across this one:
TAG : c
Date : November 22 2020, 10:40 AM , By : user2955450
Heapsort Algorithm by Cormen Implementation in C , not working correctly
Heapsort Algorithm by Cormen Implementation in C , not working correctly
it helps some times I believe your Left and right functions may have an off by one error. Left(0) should not be 0 (it should be 1), Right(0) should not be 1 (it should be 2). Left of 1 should not be 2 (it should be 3), right of 1 should not be 3 (it
TAG : c
Date : November 22 2020, 10:38 AM , By : Waldemar
C database program can't find 1st input. Why?
C database program can't find 1st input. Why?
This might help you Just remove the first fscanf the one outside the while loop, its scanning the first line of the file.A copy of your code fixed
TAG : c
Date : November 22 2020, 10:38 AM , By : Sami Almalfouh
Generate random numbers with rand() except number zero
Generate random numbers with rand() except number zero
To fix the issue you can do I would like to generate random numbers between 1 and 25 with the method rand(). , Very simple
TAG : c
Date : November 22 2020, 10:38 AM , By : user2955076
How can I know how many free bits are there in a pointer?
How can I know how many free bits are there in a pointer?
I wish this helpful for you Many recommend against using tag bits in the pointers (and so do I).If you insist on doing that, use only the two (or perhaps three) lowest bits of pointers, and preferably write your own malloc-like allocator to ensure it
TAG : c
Date : November 22 2020, 10:33 AM , By : Rahul Lawand
Program gets 101 numbers instead of 100
Program gets 101 numbers instead of 100
wish help you to fix your issue If you start counting from zero, you will count an extra number.0 ... 1 => this is 2 numbers
TAG : c
Date : November 22 2020, 10:33 AM , By : Royal Krow
Returning array pointer produces "warning: return from incompatible pointer type"
Returning array pointer produces "warning: return from incompatible pointer type"
With these it helps The type of the object you are returning doesn't match the return type of the function:
TAG : c
Date : November 22 2020, 10:33 AM , By : MsRaman
Gauss Seidel (Specific equation solver) in C
Gauss Seidel (Specific equation solver) in C
it fixes the issue sum should be reinitialized to 0 inside the for-loop before starting the next row and the equation is incorrect. The equation you are using from the python implementation assumes that a[i][i]*x[i] was added to make the full dot-pro
TAG : c
Date : November 22 2020, 10:33 AM , By : Deero
Combine 4 chars into one unsigned long
Combine 4 chars into one unsigned long
With these it helps I just want to combine 4 characters into one unsigned long variable as shown below. , This should work for you:(You just need to know the tricks)
TAG : c
Date : November 22 2020, 10:33 AM , By : user2954780
Linked List pointer printing memory leak
Linked List pointer printing memory leak
I wish this helpful for you There are several things wrong apart from the way you access the val field, which as has been commented should be curr->val.Your program, when thus corrected, prints rubbish because you only print it after pointing curr to
TAG : c
Date : November 22 2020, 10:31 AM , By : lovevintage
My program won't do search function well. Why?
My program won't do search function well. Why?
seems to work fine I made a student database program as my latest project in school. Everything works fine, you can create records with ID's, names, surnames and marks. , This answers your question, but please fix the if thing
TAG : c
Date : November 22 2020, 10:31 AM , By : Joey Kane
Varnish C VRT variables/functions
Varnish C VRT variables/functions
like below fixes the issue This is going to be a pretty long answer, because there's a fair bit to say regarding your question. First, some nits about the C code in your VCL: Implementing strtolower is probably unnecessary; the standard vmod has a st
TAG : c
Date : November 22 2020, 10:31 AM , By : user2954553
How can I concatenate strings in C?
How can I concatenate strings in C?
This might help you txt is a pointer and memory should be allocated to it.It is good to have the below checks
TAG : c
Date : November 22 2020, 10:31 AM , By : John
Char with a variable length
Char with a variable length
I hope this helps . Is it possible to define a char with a variable length?
TAG : c
Date : November 22 2020, 10:31 AM , By : Ed Bauman
Structure pointer pointing to different structure instance
Structure pointer pointing to different structure instance
Any of those help It's likely that both structs have the same element-wise alignment: sizeof(first_struct) == sizeof(second_struct) and: int e starts at the same offset in the struct as: int bIn other words, char d is effectively stored as an int in
TAG : c
Date : November 22 2020, 01:01 AM , By : user2954409
Generate random string for member of struct
Generate random string for member of struct
To fix this issue I would like to know how I can generate a random string for a member of a struct and assign this value to the member of the struct. , This will generate random string of lowercase characters
TAG : c
Date : November 21 2020, 07:31 AM , By : Piers Lafond
User Level Interrupt Handler for Timer
User Level Interrupt Handler for Timer
wish help you to fix your issue I suggest you use exactly 1 interrupt, and organize your timers in either a queue (for few times, e.g.
TAG : c
Date : November 21 2020, 07:31 AM , By : Amir Aram
Generate random number for member in struct
Generate random number for member in struct
seems to work fine Move srand(time(NULL)); to main(). If you call it in a very short interval the random seed is always the same and that's why you get the same value.
TAG : c
Date : November 21 2020, 07:31 AM , By : user2953906
Error: incompatible types when assigning to type ‘char[25]’ from type ‘char *’
Error: incompatible types when assigning to type ‘char[25]’ from type ‘char *’
it fixes the issue Array expressions may not be the target of an assignment; the = operator isn't defined to copy the contents of one array to the other.If n is meant to hold a 0-terminated string, use strcpy:
TAG : c
Date : November 21 2020, 01:01 AM , By : Ricardo Barona
Can't figure out why I am getting strange output
Can't figure out why I am getting strange output
I wish this help you You are confusing c with the current character.Try this, change this
TAG : c
Date : November 21 2020, 01:01 AM , By : stocks81
Condition checking inFor loop
Condition checking inFor loop
To fix the issue you can do Considering no access violation, exp is a char pointer, exp[i] is the value of the i+ith char element.Next, the value of exp[i] is used for condition checking. i.e, 0 for false, non-zero for true.
TAG : c
Date : November 21 2020, 01:01 AM , By : Shockzz
segmentation fault due to initialize() function when changing the size of the huge page allocation
segmentation fault due to initialize() function when changing the size of the huge page allocation
help you fix your problem When accessing set*LINE_SIZE+(ASSOC-1)*WAY_SIZE = set*64 + CACHE_SIZE - WAY_SIZE = set*64 + 4*1024*1024 - WAY_SIZE which is bigger than mmap length LENGTH = 4*1024 in the loop of initialize , you are accessing memory out of
TAG : c
Date : November 21 2020, 01:01 AM , By : user2953518
suspending an application preemptively before out of memory causes a segmentation fault
suspending an application preemptively before out of memory causes a segmentation fault
seems to work fine There is no way for a process to anticipate the fact a memory access will fail due to virtual memory shortage, especially with the mmaped sparse file technique you are using.You might trap the sigsegv but there are issues with this
TAG : c
Date : November 21 2020, 01:01 AM , By : user2953481
Should I use "rand % N" or "rand() / (RAND_MAX / N + 1)"?
Should I use "rand % N" or "rand() / (RAND_MAX / N + 1)"?
Any of those help If N is a power of two, using the remainder technique is usually safe (RAND_MAX is usually a power of two minus 1, so the entire range has a power of two length). More generally, N has to divide the range of rand() in order to avoid
TAG : c
Date : November 20 2020, 01:01 AM , By : user2953311
C programming: Sorting a integer file while keeping their original place in file
C programming: Sorting a integer file while keeping their original place in file
This might help you ok, here I have a small function that can sort some values written in the program , This is what you need
TAG : c
Date : November 20 2020, 01:01 AM , By : user2953302
Why I can't store/retrieve 11 digit long number properly
Why I can't store/retrieve 11 digit long number properly
I wish did fix the issue. TL;DR --> Please use appropriate format specifiers and always check for the limit of the value that can be held by the used data type.In your code,
TAG : c
Date : November 20 2020, 01:01 AM , By : zxcvbnm123
Out of bound array elements being printed using gcc in Win8
Out of bound array elements being printed using gcc in Win8
To fix this issue Accessing out of bound array element invokes undefined behavior and this will result in any expected or unexpected result. Change
TAG : c
Date : November 20 2020, 01:01 AM , By : user2953238
FIN-PSH-ACK server-side closure provoking RST from the client
FIN-PSH-ACK server-side closure provoking RST from the client
I hope this helps . Ok, I got my head round it myself. When I call close() based on epoll's RDHUP/HUP flags I do not get 0 from read(file_descriptor) call, that is there is a potential that some data are still in skb (even though I read it before che
TAG : c
Date : November 20 2020, 01:01 AM , By : Alfredo Monroy
Basic loop ends unexpectedly
Basic loop ends unexpectedly
I hope this helps you . What you are facing is Integer overflow.
TAG : c
Date : November 20 2020, 01:01 AM , By : user32522
PIC in C - creating own keypad scan routine using RC0-3
PIC in C - creating own keypad scan routine using RC0-3
I think the issue was by ths following , In the previous question you linked, the "1,2,4,5" refer to the keypad legends which might be anything and often bear no relation to the bit values you receive back. You write a "1" bit to each output (row) in
TAG : c
Date : November 19 2020, 03:59 PM , By : George Edward
Does #if #endif act like scope?
Does #if #endif act like scope?
it helps some times As the title hints, my question is whether the preprocessor directives if and endif act like a scope? Consider the example: , Now with your example just test it and you will see it:
TAG : c
Date : November 19 2020, 03:59 PM , By : user2952917
Why is the -- operator not subtracting from the value when executed?
Why is the -- operator not subtracting from the value when executed?
this one helps. what you're using is called a postfix operator. It will get executed [decrement the value] after the assignment = operator has finished its execution with the existing value.To be clear, in case of post decrement, the ..-- operator is
TAG : c
Date : November 19 2020, 03:59 PM , By : Victor coolsix
How i can disable maximal munch rule in Lex?
How i can disable maximal munch rule in Lex?
hope this fix your issue The easy way is to get rid of the * in your default rule at the end and just use
TAG : c
Date : November 19 2020, 03:59 PM , By : user2952786
Compiler throwing error for function return type returning structure pointer
Compiler throwing error for function return type returning structure pointer
Does that help Can someone please explain why am I getting the compilation error the below code. , change
TAG : c
Date : November 19 2020, 03:59 PM , By : Richard Peng
Is fputs more efficient than format("%s",..)?
Is fputs more efficient than format("%s",..)?
I wish did fix the issue. One or the other may be more efficient depending on the implementation.With proper optimization flag, decent compiler should be able to change less efficient form into another (assuming printf("%s\n", message)) without progr
TAG : c
Date : November 19 2020, 01:01 AM , By : user2952743
Not completed downloading of file (segmentation fault) while using curl on Ubuntu 14.04
Not completed downloading of file (segmentation fault) while using curl on Ubuntu 14.04
it should still fix some issue After compiling my program i get this error:
TAG : c
Date : November 19 2020, 01:01 AM , By : user2952704

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