Compilare: user.c: In function ‘prim’: user.c:12: warning: implicit declaration of function ‘marcare’ user.c: At top level: user.c:15: warning: conflicting types for ‘marcare’ user.c:12: note: previous implicit declaration of ‘marcare’ was here user.c: In function ‘main’: user.c:29: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result