Compilare: user.c: In function ‘main’: user.c:26:5: warning: passing argument 1 of ‘fscanf’ from incompatible pointer type [enabled by default] fscanf( "%d", &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:449:12: note: expected ‘struct FILE * restrict’ but argument is of type ‘char *’ extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ user.c:26:5: warning: passing argument 2 of ‘fscanf’ from incompatible pointer type [enabled by default] fscanf( "%d", &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:449:12: note: expected ‘const char * restrict’ but argument is of type ‘long int *’ extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ user.c:30:9: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘long int *’ [-Wformat=] fscanf( fin, "%d %d", &a, &b ); ^ user.c:30:9: warning: format ‘%d’ expects argument of type ‘int *’, but argument 4 has type ‘long int *’ [-Wformat=] user.c:26:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( "%d", &n ); ^ user.c:30:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d", &a, &b ); ^