In C, the existence of a directory can be checked using the stat function, which retrieves information about the file or directory at a specified path.
stat
Creating a temporary file in the C programming language can leverage functions such as tmpfile() and mkstemp().
tmpfile()
mkstemp()
To start reading a text file in C, you primarily work with the fopen(), fgets(), and fclose() functions from the standard I/O library.
fopen()
fgets()
fclose()
In C, the main function can be designed to accept command line arguments using the parameters int argc and char *argv[].
main
int argc
char *argv[]
To write text to a file in C, you primarily need to be familiar with the fopen(), fprintf(), fputs(), and fclose() functions.
fprintf()
fputs()
In C, the stderr stream is used to write error messages.
stderr