Compilare: user.cpp: In function ‘int main()’: user.cpp:23:27: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘long int*’ [-Wformat=] fscanf(f, "%d %d", &n, &x); ^ user.cpp:45:26: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(o, "%d", a + 1); ^ user.cpp:22:13: warning: unused variable ‘b’ [-Wunused-variable] long x, a, b,i; ^