Compilare: user.c:2:1: warning: return type defaults to ‘int’ [enabled by default] main() { freopen("tetris.out", "w", stdout); printf(u"㘵㤶㔰"); } ^ user.c: In function ‘main’: user.c:2:1: warning: passing argument 1 of ‘printf’ from incompatible pointer type [enabled by default] In file included from /usr/include/stdio.h:934:0, from user.c:1: /usr/include/i386-linux-gnu/bits/stdio2.h:103:1: note: expected ‘const char * restrict’ but argument is of type ‘short unsigned int *’ printf (__const char *__restrict __fmt, ...) ^ user.c:2:1: warning: format is a wide character string [-Wformat=] main() { freopen("tetris.out", "w", stdout); printf(u"㘵㤶㔰"); } ^ user.c:2:17: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] main() { freopen("tetris.out", "w", stdout); printf(u"㘵㤶㔰"); } ^