Compilare: main.c: In function 'main': main.c:10:9: warning: passing argument 1 of 'fscanf' from incompatible pointer type [-Wincompatible-pointer-types] fscanf("%d", &x); ^~~~ In file included from /usr/include/features.h:367:0, from /usr/include/stdio.h:27, from main.c:3: /usr/include/stdio.h:443:12: note: expected 'FILE * restrict {aka struct _IO_FILE * restrict}' but argument is of type 'char *' extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ main.c:10:15: warning: passing argument 2 of 'fscanf' from incompatible pointer type [-Wincompatible-pointer-types] fscanf("%d", &x); ^ In file included from /usr/include/features.h:367:0, from /usr/include/stdio.h:27, from main.c:3: /usr/include/stdio.h:443:12: note: expected 'const char * restrict' but argument is of type 'int *' extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ main.c:10:15: warning: format not a string literal and no format arguments [-Wformat-security] fscanf("%d", &x); ^~ main.c:11:9: warning: passing argument 1 of 'fscanf' from incompatible pointer type [-Wincompatible-pointer-types] fscanf("%d", &y); ^~~~ In file included from /usr/include/features.h:367:0, from /usr/include/stdio.h:27, from main.c:3: /usr/include/stdio.h:443:12: note: expected 'FILE * restrict {aka struct _IO_FILE * restrict}' but argument is of type 'char *' extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ main.c:11:15: warning: passing argument 2 of 'fscanf' from incompatible pointer type [-Wincompatible-pointer-types] fscanf("%d", &y); ^ In file included from /usr/include/features.h:367:0, from /usr/include/stdio.h:27, from main.c:3: /usr/include/stdio.h:443:12: note: expected 'const char * restrict' but argument is of type 'int *' extern int __REDIRECT (fscanf, (FILE *__restrict __stream, ^ main.c:11:15: warning: format not a string literal and no format arguments [-Wformat-security] fscanf("%d", &y); ^~ main.c:13:10: warning: passing argument 1 of 'fprintf' from incompatible pointer type [-Wincompatible-pointer-types] fprintf("%d\n", x + y); ^~~~~~ In file included from /usr/include/stdio.h:936:0, from main.c:3: /usr/include/x86_64-linux-gnu/bits/stdio2.h:95:1: note: expected 'FILE * restrict {aka struct _IO_FILE * restrict}' but argument is of type 'char *' fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)