Compilare: user.cpp: In function ‘int main()’: user.cpp:24:27: warning: unused variable ‘ca’ [-Wunused-variable] int n, a, b, c, x, y, ca, cb, r, i, d, q; ^ user.cpp:24:31: warning: unused variable ‘cb’ [-Wunused-variable] int n, a, b, c, x, y, ca, cb, r, i, d, q; ^ user.cpp:24:35: warning: unused variable ‘r’ [-Wunused-variable] int n, a, b, c, x, y, ca, cb, r, i, d, q; ^