Compilare: user.c: In function ‘main’: user.c:12:1: warning: passing argument 1 of ‘fclose’ from incompatible pointer type [enabled by default] fclose("adunare.in");fclose("adunare.out"); ^ In file included from user.c:1:0: /usr/include/stdio.h:214:12: note: expected ‘struct FILE *’ but argument is of type ‘char *’ extern int fclose (FILE *__stream); ^ user.c:12:1: warning: passing argument 1 of ‘fclose’ from incompatible pointer type [enabled by default] fclose("adunare.in");fclose("adunare.out"); ^ In file included from user.c:1:0: /usr/include/stdio.h:214:12: note: expected ‘struct FILE *’ but argument is of type ‘char *’ extern int fclose (FILE *__stream); ^