In many C++ IDE's and compilers, when it generates the main function for you, it looks like this: int main(int argc, char *argv[]) When I code C++ without an IDE, just with a command line compil...

this is how we use MPI_Init function int main(int argc, char **argv) { MPI_Init(&argc, &argv); … } why does MPI_Init use pointers to argc and argv instead of values of argv?

If I want to keep the bulk of my code for processing command line arguments out of main (for organization and more readable code), what would be the best way to do it? void main(int argc, char* ar...

I'm using a shared host (fasthostingdirect) and for some reason they have this flag turned off by default. This means I'm unable to access PHP command line parameters... unless I use the -n (= --no...

I written the following script which gets name of a file and then assemble and link the file. But it doesn't work. What is the problem with it? EXPECTED_ARGS=2 if [ $# -ne $EXPECTED_ARGS ]...

I recently made minor changes to previously-working code, and the program now immediately encounters a segmentation fault upon execution. In fact, it doesn't even make it to the first line in...

Is it possible to execute a process whose argc = 0? I need to execute a program but it is extremely important for its argc to be equal to 0. Is there a way to do that? I tried to put 2^32 arguments...

Hi very newbie question but I just can't figure it out: I have a function named bar class foo { public: bool bar(int argc, char** argv); } argv is supposed to contain "--dir" and "/som...

I always thought that argc was required to mark the end of argv but I just learned that argv[argc] == NULL by definition. Am I right in thinking that argc is totally redundant? If so, I alway...

I recently came across the following in my searches regarding environment variables in C: int main (int argc, char *argv[], *char *envp[]) I have searched around and can't find anything conclusi...

I recently saw something curious. In the HHVM source code, the very first 3 lines of the main() function read as follows: if (!argc) { return 0; } It's a bit silly, but still, I just can't help...

int main( const int argc , const char[] const argv) As Effective C++ Item#3 states "Use const whenever possible", I start thinking "why not make these 'constant' parameters const"?. Is there any...

For my program I have to make sure the user only inputs a positive INTEGER. for example if the user inputted 12hi it should not run the program and print to std error. I am not quite sure how to im...

Possible Duplicate: argc and argv in main I'm having difficulty understanding the notation used for the general main function declaration, i.e. int main(int argc, char *argv[]). I und...

Sometimes the correct argc value is returned, sometimes 0, and sometimes (seemingly)random numbers... all from the same executable. .section .text .global _start _start: movq $1, %rax popq %rdi ...

I have a working program but now I have to use the int argc and char *argv[] parameters to main. Whenever I try to do this it gives me errors that it cannot save. Is there any way to make argc and ...

Possible Duplicates: What are the arguments to main() for? What does int argc, char *argv[] mean? Every program is starting with the main(int argc, char *argv[]) definition. I don'...