Compilare: user.c: In function ‘main’: user.c:24:1: warning: passing argument 1 of ‘scanf’ from incompatible pointer type [enabled by default] scanf(ain,"%d",&T); ^ In file included from /usr/include/features.h:346:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/stdio.h:428:12: note: expected ‘const char * restrict’ but argument is of type ‘struct FILE *’ extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), ^