lhao专栏

a = 1 ;   c = ++a*++a*++a =   (++a)*(++a)*(++a) //二叉樹解析為：表達式1＊表達式2＊表達式3 = 2*3*4 = 24 ;   = (++a　*　++a) * (++a) //解析為：表達式1＊表達式2 = 3*3*4 = 36 ;   = ++a*++a*++a //解析為：一體化表達式 a*a*a = 4*4*4 = 64

a++ + a++ it first calculates a + a then does ++ twice think of it like a = 3 + 3 a = 6++ ++ a = 7++ 8 ++a + ++a it first does ++a twice, then a + a a = ++ ++3 a = ++4 a = 5 a = 5 +