Compilare: user.c: In function ‘read’: user.c:17:2: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘long unsigned int *’ [-Wformat=] fscanf(f, "%d", &p); ^ user.c: In function ‘write’: user.c:24:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=] fprintf(f, "%d", n); ^ user.c: At top level: user.c:63:15: warning: return type of ‘main’ is not ‘int’ [-Wmain] unsigned long main() ^ user.c: In function ‘main’: user.c:67:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=] printf("p = %8d, n = %8d\t", p, n); ^ user.c:67:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]