Compilare: user.c: In function ‘main’: user.c:17:5: warning: passing argument 1 of ‘scanf’ from incompatible pointer type [enabled by default] scanf(in, "%d %d", &M, &N); ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/stdio.h:452:12: note: expected ‘const char * restrict’ but argument is of type ‘struct FILE *’ extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), ^ user.c:19:9: warning: passing argument 1 of ‘scanf’ from incompatible pointer type [enabled by default] scanf(in, "%d", &A[i]); ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/stdio.h:452:12: note: expected ‘const char * restrict’ but argument is of type ‘struct FILE *’ extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), ^ user.c:21:9: warning: passing argument 1 of ‘scanf’ from incompatible pointer type [enabled by default] scanf(in, "%d", &B[i]); ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/stdio.h:452:12: note: expected ‘const char * restrict’ but argument is of type ‘struct FILE *’ extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), ^ user.c:12:16: warning: variable ‘out’ set but not used [-Wunused-but-set-variable] FILE *in, *out; ^ user.c:17:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf(in, "%d %d", &M, &N); ^ user.c:19:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf(in, "%d", &A[i]); ^ user.c:21:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf(in, "%d", &B[i]); ^