Compilare: user.c: In function 'main': user.c:12: warning: format '%d' expects type 'int *', but argument 3 has type 'short unsigned int *' user.c:13: warning: implicit declaration of function 'calloc' user.c:13: warning: incompatible implicit declaration of built-in function 'calloc' user.c:24: warning: format '%1d' expects type 'int *', but argument 3 has type 'short unsigned int *' user.c:58: warning: implicit declaration of function 'free'