for
while
void
NULL
const
strlen( const char *source )
strcpy( char *target, const char *source )
strchr( const char *source, char c )
strcat( char *target, const char *source )
printf
sprintf
malloc
sizeof
sizeof()
void *memset( void *target, int c, size_t bytes )
void *memchr( const void *source, int c, size_t len )
void *memcpy( void *target, const void *source, size_t bytes )
void *memmove( void *target, const void *source, size_t bytes )
free