Compilare: user.cpp: In function ‘int main()’: user.cpp:53:22: warning: unused variable ‘rad’ [-Wunused-variable] int i, nr, s, d, rad, prod, r1, r2; ^ user.cpp:53:27: warning: unused variable ‘prod’ [-Wunused-variable] int i, nr, s, d, rad, prod, r1, r2; ^ user.cpp:53:33: warning: unused variable ‘r1’ [-Wunused-variable] int i, nr, s, d, rad, prod, r1, r2; ^ user.cpp:53:37: warning: unused variable ‘r2’ [-Wunused-variable] int i, nr, s, d, rad, prod, r1, r2; ^