“Initializer element is not constant” in C
Could you tell me what’s wrong? When I try to compile it I see an error:Initializer element is not constant. It’s about 2nd line, probably going about x.
c
How to print pthread_t
This will print out a hexadecimal representation of a pthread_t, no matter what that actually is: To just print a small id for a each pthread_t something like this could be used (this time using iostreams): Depending on the platform and the actual representation of pthread_t it might here be necessary to define an operator< for pthread_t, because std::map needs an ordering on the elements:
what is the meaning of == sign?
The == operator tests for equality. For example: And, in your example: x is true (1) if y is equal to z. If y is not equal to z, x is false (0). A common mistake made by novice C programmers (and a typo made by some very experienced ones as well) is: In this case, b is assigned … Read more
How to extract C source code from .so file?
I am working on previously developed software and source code is compiled as linux shared libraries (.so) and source code is not present. Is there any tool which can extract source code from the linux shared libraries?
what is stack smashing (C)?
Code: Output: string-1 length = 7, char *a = StringA StringB *** stack smashing detected **** : /T02 terminated Aborted (core dumped) I don’t understand why it’s showing stack smashing? and what is *stack smashing? Or is it my compiler’s error?
how to use wait in C
The wait system-call puts the process to sleep and waits for a child-process to end. It then fills in the argument with the exit code of the child-process (if the argument is not NULL). So if in the parent process you have And in the child process you do e.g. exit(1), then the above code will print Child process … Read more
How do we check if a pointer is NULL pointer?
I always think simply if(p != NULL){..} will do the job. But after reading this Stack Overflow question, it seems not. So what’s the canonical way to check for NULL pointers after absorbing all discussion in that question which says NULL pointers can have non-zero value?
need help understanding the movzbl call in this function
A corresponding C function would be something like Specifically, the movzbl instruction fetches the byte stored at the sum of the two parameters, zero pads it, and stores it into eax. The movsbl instruction takes the lowest byte of eax, sign extends it, and stores the result back in eax.
How do you make an array of structs in C?
this works fine. your question was not very clear by the way, so match the layout of your source code with the above.
C library function to perform sort
Is there any library function available in C standard library to do sort?