Compilare: user.c: In function ‘main’: user.c:37:5: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration] kint *A = malloc(n * sizeof(kint)); ^ user.c:37:15: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] kint *A = malloc(n * sizeof(kint)); ^ user.c:40:9: warning: format ‘%u’ expects argument of type ‘unsigned int *’, but argument 3 has type ‘kint *’ [-Wformat=] fscanf(in, "%u", A + i); ^ user.c:43:9: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘kint’ [-Wformat=] fprintf(out, "%u ", A[i]); ^