Compilare: user.c:3: warning: built-in function 'y1' declared as non-function user.c: In function 'afis': user.c:31: warning: format '%2d' expects type 'int', but argument 2 has type 'long int' user.c: In function 'afis2': user.c:43: warning: format '%2d' expects type 'int', but argument 2 has type 'long int' user.c:86:2: warning: no newline at end of file