(x > 10 或 x == 10) 与 (x == 30 不成立),对应C++表达式:(x >= 10) && (x != 30)
(x >= 10) && (x != 30)
(x > 10 与 x == 10) 或 (x == 30 不成立),对应C++表达式:(x > 10 && x == 10) || (x != 30)
(x > 10 && x == 10) || (x != 30)
(x > 10 与 x == 10) 与 (x == 30 不成立),对应C++表达式:(x > 10 && x == 10) && (x != 30)
(x > 10 && x == 10) && (x != 30)
(x > 10 或 x == 10) 或 (x == 30 不成立),对应C++表达式:(x >= 10) || (x != 30)
(x >= 10) || (x != 30)