Compilare: user.cpp: In function ‘int main()’: user.cpp:8:15: warning: unused variable ‘i’ [-Wunused-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^ user.cpp:8:17: warning: variable ‘ca’ set but not used [-Wunused-but-set-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^~ user.cpp:8:20: warning: variable ‘cb’ set but not used [-Wunused-but-set-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^~ user.cpp:8:23: warning: unused variable ‘d’ [-Wunused-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^ user.cpp:8:25: warning: unused variable ‘ok1’ [-Wunused-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^~~ user.cpp:8:29: warning: unused variable ‘ok2’ [-Wunused-variable] { int a , b , i,ca,cb,d,ok1,ok2; ^~~