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C QUESTIONS

C: Unable to store lines from a file into an array
C: Unable to store lines from a file into an array
around this issue Each time you read a line, you store it in the lines character array, and then you save the address of that array in the next space of expressions. If you look at the values stored in expressions you'll find that they are all the sa
TAG : c
Date : December 05 2020, 12:24 PM , By : Ani Krishnan
Should I be using GTK threads/Good tutorials on GTK threading?
Should I be using GTK threads/Good tutorials on GTK threading?
I wish did fix the issue. I would discourage you from using threads if your only reason for doing so is to keep your UI responsive. Instead, you should call
TAG : c
Date : December 05 2020, 12:24 PM , By : aria26
Program works but outputs trailing garbage values
Program works but outputs trailing garbage values
will be helpful for those in need I am working on a code that gives the steps to change one string into another and it works fine but gives garbage values.
TAG : c
Date : December 01 2020, 04:55 PM , By : user5943646
Letting 2 pointer pointing to same address
Letting 2 pointer pointing to same address
hope this fix your issue I have just started learning data structure and i was confused by pointer. , You do
TAG : c
Date : December 01 2020, 04:55 PM , By : magicYang
Different ways to print the two-dimensional array's contents
Different ways to print the two-dimensional array's contents
like below fixes the issue What you are doing there is bad practice in both cases. You are just lucky that the first way works (because the 3 sub arrays of size 4 are consecutive in memory).If you want to work with two-dimensional arrays in a one-dim
TAG : c
Date : December 01 2020, 04:55 PM , By : tnotm
C Programming : Confusion between operator precedence
C Programming : Confusion between operator precedence
Hope that helps You can not rely on the output of this program since it is undefined behavior, the evaluation order is not specified in C since that allows the compiler to optimize better, from the C99 draft standard section 6.5 paragraph 3:
TAG : c
Date : December 01 2020, 04:55 PM , By : Andrei Voicu
C code inside a loop not being executed
C code inside a loop not being executed
wish of those help You don't mention much about what compiler, IDE or framework that you're using. But a way to isolate the problem is to create a new small (console) project, containing only the snippet you've posted. This way you'll eliminate most
TAG : c
Date : December 01 2020, 04:55 PM , By : EddyZatex
C - Weird symbols
C - Weird symbols
Does that help Since you did not specify which operators you are unfamiliar with I will go through a general run down of a few of them and link you to a few resources you can read on your own time. There are a combination of logical operators and bit
TAG : c
Date : December 01 2020, 04:55 PM , By : TheNakedAmerican
C - Get pointer adress to string
C - Get pointer adress to string
I think the issue was by ths following , You are probably lost on what is a pointer.Consider this code: char *foo = "bar";
TAG : c
Date : November 29 2020, 01:01 AM , By : Ankit Shah
how to start a function using a Struct?
how to start a function using a Struct?
may help you . So I have to read a binary file full of structs like this: , I need to start the function add(a,b) ;
TAG : c
Date : November 29 2020, 01:01 AM , By : 吕顺年
Trying to tweak sscanf() to ignore \n and \t
Trying to tweak sscanf() to ignore \n and \t
may help you . Note that sscanf() largely ignores white space by default. A white space in the format string matches zero or more white space characters — blanks, tabs, newlines. All but three of the conversion specifications ignore leading white spa
TAG : c
Date : November 29 2020, 01:01 AM , By : Frank Tang
How to find the inverse of a Rectangular Matrix in C using GSL
How to find the inverse of a Rectangular Matrix in C using GSL
I wish this help you Yes, it is possible! You probably did not fin it because it is in the chapter Linear Algebra, not Matrices.In GSL you first compute the LU decomposition and then use it to determine the inverse via
TAG : c
Date : November 29 2020, 01:01 AM , By : matt211
sizeof() showing different output
sizeof() showing different output
like below fixes the issue Here is a snippet of C99 code: , didn't understand why size of is showing 2.
TAG : c
Date : November 29 2020, 01:01 AM , By : Katie L Larder
How to select/read/copy values after specific character in a string
How to select/read/copy values after specific character in a string
it should still fix some issue Given a string in the form ans=999, you would normally use strchr() to find the =.So,
TAG : c
Date : November 29 2020, 01:01 AM , By : Jingan Qu
Jump from bootloader generates exception
Jump from bootloader generates exception
it should still fix some issue I had the same problem with SAM4E. I cannot guess what your problem might be, but I can point out difficulties that I had and information I used.My bootloader was not storing in the correct memory location a few parts o
TAG : c
Date : November 28 2020, 08:01 AM , By : Chris Hoebeke
Array dropping values, picks up garbage
Array dropping values, picks up garbage
Hope that helps The problem is that init_child() is initializing children with the address of an array that was created at function scope. When the function returns, the array is no longer valid, and so the child structure returned is pointing to an
TAG : c
Date : November 28 2020, 08:01 AM , By : Emfs
Swig: Syntax error in input(3)
Swig: Syntax error in input(3)
I wish this help you Typically, a syntax error in SWIG means that it can't understand the line in question (which can be annoying, because the line numbers don't follow macros such as %defines). So I suggest you check that string (should it be std::s
TAG : c
Date : November 28 2020, 08:01 AM , By : Sravan Kumar Mittako
multiple definition and making sure function is correctly written
multiple definition and making sure function is correctly written
like below fixes the issue You have two very different errors that you really should have asked about in two different question, but I'll be nice and answer both anyway.
TAG : c
Date : November 28 2020, 01:01 AM , By : K.Ken
MD4 openssl core dumped
MD4 openssl core dumped
will be helpful for those in need You are passing a NULL pointer to EVP_Digest as the output length variable. You need to do the following:
TAG : c
Date : November 28 2020, 01:01 AM , By : Mehedi Habib
Undefined-Behavior at its best, is it -boundary break? -bad pointer arithmetic? Or just -ignore of aliasing?
Undefined-Behavior at its best, is it -boundary break? -bad pointer arithmetic? Or just -ignore of aliasing?
I wish did fix the issue. You are basically running into paragraph 6.3.2.3 Pointer ad 5 in conversion from int to char* in the assignment to TheAccesingPointer.
TAG : c
Date : November 27 2020, 01:01 AM , By : Damian Collier
Why am i getting problem3.c:20:23: error: expected expression before ‘int’?
Why am i getting problem3.c:20:23: error: expected expression before ‘int’?
Any of those help Ive been over the code a few times and cant seem to find the problem. Ive seen some other people with similar error and some of them involve casting issues, but im having trouble seeing why that might be an issue here. , This:
TAG : c
Date : November 27 2020, 01:01 AM , By : Rashpal Rashpal
Right Justified Zero filled String in C
Right Justified Zero filled String in C
should help you out I want to right justify a string value with zero filled on left hand side. I have written following code but it prints white space instead of 0. , You can do something like this :
TAG : c
Date : November 27 2020, 01:01 AM , By : Nostos Logia
C Function with parameter without type indicator still works?
C Function with parameter without type indicator still works?
To fix the issue you can do This behaviour is to provide backwards compatibility with older versions of the language, the KR version of the language. When GCC encounters an "old style" function, it conforms to the old KR C behaviour which implies no
TAG : c
Date : November 27 2020, 01:01 AM , By : Omer Geva
How to transmit data from an interrupt handler to an user application?
How to transmit data from an interrupt handler to an user application?
With these it helps IMHO the POSIX style solution would be to write a device driver that receives the interrupts in the kernel. The user space program would open a device file and icoctl() or read() from it, blocking until at least one event had arri
TAG : c
Date : November 26 2020, 01:01 AM , By : Дмитрий Колодезев
Why do I get the error "bash: ./a.out: Permission denied" when I execute a C program in Linux mint 15
Why do I get the error "bash: ./a.out: Permission denied" when I execute a C program in Linux mint 15
I wish this helpful for you I think, you are trying to run your program on an NTFS partition, different from the one on which Mint is installed. Try to compile the program in your ext4 partition and generate the a.out there. It should run.
TAG : c
Date : November 25 2020, 07:27 PM , By : Sdrgen Mpele Motlokw
syntax of sigchld and its declaration
syntax of sigchld and its declaration
hope this fix your issue On compiling my C program for implementing multiple client server chat program using UDP ,i got some errors..I was able to correct some of them, but cannot do with some others.. They are....: , What about including the approp
TAG : c
Date : November 25 2020, 07:27 PM , By : pedram nourani
error using g_idle_add() in C++, same thing works in C
error using g_idle_add() in C++, same thing works in C
hope this fix your issue A pointer to a function is different than a pointer to a class method. You have to have an object of the class if you want to use a pointer to a method. You should wrap your method in a C function. For example:
TAG : c
Date : November 25 2020, 07:22 PM , By : Mwesigwa Ezra
why if else or nested if else are called single statement in C
why if else or nested if else are called single statement in C
seems to work fine In C, there are statements that contain other statements -- such statements are not terminated by a semicolon. An if statement is a selection statement that can contain one or two statements (that may in turn be compound statements
TAG : c
Date : November 25 2020, 07:22 PM , By : MEGHA A
How do I interpret this printf in C
How do I interpret this printf in C
Any of those help The * in the format code "%*s" tells printf that the next argument is a field width followed by the normal argument (a string in this case).It's the same as e.g. "%4s" in your case, but the width can be set in runtime.
TAG : c
Date : November 25 2020, 07:22 PM , By : Patrick Miller
load the functions of a shell script without executing it
load the functions of a shell script without executing it
fixed the issue. Will look into that further Most shells (like bash and zsh) have support for functions. You can define functions and call them arbitrarily. Sourcing a file with function definitions will not execute them.
TAG : c
Date : November 25 2020, 07:22 PM , By : Snimax
Is FilterSendNetBufferLists handler a must for an NDIS filter to use NdisFSendNetBufferLists?
Is FilterSendNetBufferLists handler a must for an NDIS filter to use NdisFSendNetBufferLists?
this will help everyone, I am porting the WinPcap from NDIS6 protocol to NDIS6 filter. It is nearly finished, but I still have a bit of questions: , Send and Receive A LWF can either be:
TAG : c
Date : November 25 2020, 07:22 PM , By : Christopher Nchabele
How to write to flash memory using inline assembly?
How to write to flash memory using inline assembly?
Hope this helps It looks like you arrived at the solution already: the problem is in using BANKED.EECON2 and the like are Special Function Registers (SFRs) that reside in bank 15. The fastest way to access them is to use ACCESS, which ignores the ban
TAG : c
Date : November 25 2020, 07:06 PM , By : vinod vijay
More Return Statements vs. More Indentation
More Return Statements vs. More Indentation
This might help you You can actually go either way though I tend to prefer the latter since it immediately calls out the "failure" condition. My personal preference would be to have a blank line following the first return since it calls out that cond
TAG : c
Date : November 25 2020, 07:06 PM , By : ettan
How to show an image on a PictureBox from resource?
How to show an image on a PictureBox from resource?
around this issue If you want to use LR_LOADFROMFILE you must give a BMP filename not a resource. With ressource try with something like that.
TAG : c
Date : November 25 2020, 07:06 PM , By : Heiko
Having malloced some memory,I could't calculator the proper size of the memories I malloced.I don't know why
Having malloced some memory,I could't calculator the proper size of the memories I malloced.I don't know why
may help you . The code for malloc and free has to maintain data structures keeping track of each block of memory it's given you. Let's imagine there's a 16-byte data structure per block of memory returned by malloc. You said you allocated 119 MB, wh
TAG : c
Date : November 25 2020, 01:01 AM , By : apoorva
What is the main difference between integer pointer and character pointer?
What is the main difference between integer pointer and character pointer?
wish of those help Another Difference lies when you increment the pointer, each pointer increment by its corresponding element type.
TAG : c
Date : November 25 2020, 01:01 AM , By : David White
Why are some functions declared extern and header file not included in source in Git source code?
Why are some functions declared extern and header file not included in source in Git source code?
Hope that helps strbuf.c includes cache.h and cache.h includes strbuf.h, so your premise for question 2 (that strbuf.c does not include strbuf.h) is wrong: it does include it, just not directly.extern applied to functions
TAG : c
Date : November 25 2020, 01:01 AM , By : José Miguel Torrico
what is the use of fflush(stdin) in c programming
what is the use of fflush(stdin) in c programming
will be helpful for those in need It's not in standard C, so the behavior is undefined.Some implementation uses it to clear stdin buffer.
TAG : c
Date : November 25 2020, 01:01 AM , By : Egie
Is it safe to return file File descriptor locally allocated from another function In C
Is it safe to return file File descriptor locally allocated from another function In C
I wish this help you The FILE object is not local to your BestTry function. That function gets a pointer to a FILE object, and that pointer is indeed local, but the object itself is not.What you're doing is fine, the actual FILE object is still live
TAG : c
Date : November 25 2020, 01:01 AM , By : plusli
Changing undefined values of an array
Changing undefined values of an array
it fixes the issue If the elements of the array are a floating-point type, you can use a NaN to indicate that they are not set to a number (in most C implementations; this is not in all C implementations but is common). You would have to initialize t
TAG : c
Date : November 25 2020, 01:01 AM , By : nagendra shanbhag
What does an empty parameter list mean?
What does an empty parameter list mean?
like below fixes the issue This is an obsolescent feature1 from before C was standardized, decades ago.Never use it.
TAG : c
Date : November 25 2020, 01:01 AM , By : Namyong Park
using strtol on a string literal causing segmentation fault
using strtol on a string literal causing segmentation fault
this one helps. the issue is that ptr isn't initialised. So when strtol tries to write at the address ptr, it crashes (or undefined behaviour).You have to pass the valid address of a pointer to store the last unprocessed char, like:
TAG : c
Date : November 24 2020, 03:41 PM , By : Ronildo Quadros
Same structure objects memory overlap?
Same structure objects memory overlap?
this one helps. you have printed the same variable, *int1.strIt will be helpful have the source code of str_input(), but it's probably that it returns a pointer to the same buffer in each call, so the second call to str_input() updates also the targe
TAG : c
Date : November 24 2020, 03:41 PM , By : Sathya Priya
C-Linux-Any way to pass command "history" to Linux shell?
C-Linux-Any way to pass command "history" to Linux shell?
Hope this helps You might also be able to actually invoke the built-in command by using the shell:
TAG : c
Date : November 24 2020, 03:41 PM , By : David Condrey
Using #define in defining string size C
Using #define in defining string size C
wish helps you They are both equivalent. In the first program macro MAX_LEN is replaced with 10000 by simple textual substitution.
TAG : c
Date : November 24 2020, 03:41 PM , By : Minh Hoang Vo
How to use thread pool and message queues in Multithreaded Matrix Multiplication?
How to use thread pool and message queues in Multithreaded Matrix Multiplication?
this will help How do I use mutex lock on shared variable sum?You need to declare a mutex and use it to lock the sum before use sum ,and unlock it after use sum. Do that every time you use sum to protect it.
TAG : c
Date : November 24 2020, 03:41 PM , By : junding.zhou
Can't find how to select path to run a C program
Can't find how to select path to run a C program
around this issue run it with $./yourProgramFile command the ./ in the beginning is important. It means the program resides in the current directory.Example:
TAG : c
Date : November 24 2020, 05:47 AM , By : Chiang
Automatic variable in C not initialized but given fixed value within loop
Automatic variable in C not initialized but given fixed value within loop
should help you out Uninitialized means declared but is not set to a definite known value before it is used. It will have SOME value, but not a predictable one.In your case it is 2. On other system it may be anything else.
TAG : c
Date : November 24 2020, 05:47 AM , By : Joe
main() function defined without return type gives warning
main() function defined without return type gives warning
it helps some times There are few things which you should take note of : The int is the main() function's return type. That means that the kind of value main() can return is an integer. main( ) was tolerated by the C90 compilers but not by C99 compil
TAG : c
Date : November 24 2020, 05:47 AM , By : Christopher Logan
Output of following code with integer, float, char variable
Output of following code with integer, float, char variable
Hope that helps For several reasons (instruction set architecture, performance of generated code, ABI conformance...), the compiler is doing some data padding.You could perhaps use the GCC __attribute__((packed)) (if using GCC or a compatible compile
TAG : c
Date : November 24 2020, 05:47 AM , By : Michal Tumamak
why buffer memory allocation error in opencl
why buffer memory allocation error in opencl
hop of those help? With clGetDeviceInfo, you can query the device global memory size with CL_DEVICE_GLOBAL_MEM_SIZE, and the maximum size you can alloc in a single memory object with CL_DEVICE_MAX_MEM_ALLOC_SIZE. Three matrices of 20000*20000*sizeof(
TAG : c
Date : November 24 2020, 05:47 AM , By : matica0902
Why am I getting this error during run-time?
Why am I getting this error during run-time?
it fixes the issue As exch_2 expects addresses as parameters, you would have to call it exch_2(a,b);.You are passing the values, and these are taken as addresses. If e. g. a has a value of 5, the computer would try to use the value at address 5on you
TAG : c
Date : November 24 2020, 05:47 AM , By : Lê Thắng
Strange behaviour of the pow function
Strange behaviour of the pow function
this will help I can't even spell c, but I can tell you why.You have set a to be an int. pow() generates a floating point number, that in SOME cases may be just a hair less than 100 or 10000 (as we see here.)
TAG : c
Date : November 24 2020, 05:47 AM , By : dean
task in increment , decrement , printf() , why these are evaluated in this manner in C
task in increment , decrement , printf() , why these are evaluated in this manner in C
To fix this issue This is all undefined behavior modifying a variable more than one in between sequence points in this in this case within the same expression is not allowed. So you can not rely on the output of this program at all.From the c99 draft
TAG : c
Date : November 24 2020, 05:44 AM , By : David Hume
28 extra bytes in bss
28 extra bytes in bss
seems to work fine The last column of the readelf output is alignment, and the value shown is indeed "32". So, the BSS size is being rounded up to the nearest multiple of 32 bytes.
TAG : c
Date : November 24 2020, 05:44 AM , By : Fernan Fortunato
Waiting for multiple events without polling
Waiting for multiple events without polling
it should still fix some issue See the select() system call.This is especially useful for waiting for multiple file channels.
TAG : c
Date : November 24 2020, 05:44 AM , By : macUF
Why are my variables reporting as "undeclared identifier" when compiling?
Why are my variables reporting as "undeclared identifier" when compiling?
it should still fix some issue You have semi colons at the end of the for statements which turns them into single line statements:
TAG : c
Date : November 24 2020, 01:01 AM , By : user2957700
Correct AddNode function but somehing happens when I printf
Correct AddNode function but somehing happens when I printf
may help you . You don't show how you read in the words, but I guess this is what happens:When you take input from the user, you probably use the same char buffer. You assign that char buffer to your list node's word and it holds the current word whi
TAG : c
Date : November 24 2020, 01:01 AM , By : user2957604
When I traverse in the splay tree, then now which one is root?
When I traverse in the splay tree, then now which one is root?
seems to work fine Your logic is correct. But the operation of splaying is only done during insertion and searching and not during traversal. When you insert or search a node it is moved to the top(made as root node) so that it would be accessed quic
TAG : c
Date : November 24 2020, 01:01 AM , By : SeanSheep
Data type conversion in Postfix evaluation
Data type conversion in Postfix evaluation
I think the issue was by ths following , Why do we pass exp[i]- '0' in the push if exp[i] is a digit but don't do the same in case of operator
TAG : c
Date : November 23 2020, 01:01 AM , By : user2957376

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