fwide(3) Library Functions Manual fwide(3) fwide - FILE (libc -lc) #include int fwide(FILE *stream, int mode); glibc ( feature_test_macros(7)): fwide(): _XOPEN_SOURCE >= 500 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L mode fwide() stream. stream / / . stream -- / / . stream / ( / / ). . mode fwide() stream ( mode 0 mode 0). . fwide() . . . . C11, POSIX.1-2008. POSIX.1-2001 C99. fprintf(3) %lc %ls. fwprintf(3) %c %s. fprintf(3), fwprintf(3) 3 . . : . 6.18 8 2026 fwide(3)