Compilare: user.cpp: In function ‘int main()’: user.cpp:44:27: warning: operation on ‘t1’ may be undefined [-Wsequence-point] t1 = ( ++ t1 ) % 3; t2 = ( ++ t2 ) % 3; t3 = ( ++ t3 ) % 3; ^ user.cpp:44:47: warning: operation on ‘t2’ may be undefined [-Wsequence-point] t1 = ( ++ t1 ) % 3; t2 = ( ++ t2 ) % 3; t3 = ( ++ t3 ) % 3; ^ user.cpp:44:67: warning: operation on ‘t3’ may be undefined [-Wsequence-point] t1 = ( ++ t1 ) % 3; t2 = ( ++ t2 ) % 3; t3 = ( ++ t3 ) % 3; ^