Compilare: user.c:4: warning: return type defaults to 'int' user.c: In function 'main': user.c:9: warning: format '%d' expects type 'int *', but argument 3 has type 'long int *' user.c:9: warning: format '%d' expects type 'int *', but argument 4 has type 'long int *' user.c:13: warning: format '%d' expects type 'int', but argument 3 has type 'long int' user.c:15: warning: control reaches end of non-void function