man get_extension () - Returns a pointer to the extension of a filename. Allegro game programming library.
NAME
get_extension - Returns a pointer to the extension of a filename. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
char *get_extension(const char *filename);
DESCRIPTION
Finds out the extension of the filename (with or without path information). Example:
get_executable_name(name, sizeof(n)); allegro_message("The binary has the extension `%s'\n", get_extension(n));
RETURN VALUE
Returns a pointer to the portion of `filename' where the extension starts, or a pointer to the trailing null character if there is no filename or it doesn't have extension.