Operator

Operator Description Expression Example
[] 数组下标 ArrayName[number] arr[0]
() 圆括号 (Expression) Function(Parameter) | ()
. 成员选择(对象) Object.Memeber person.age
-> 成员选择(指针) Object->Member person->age
- 负号运算符 -Expression -2
({Type}) 强制类型转换 (Type)Expression (Int)8
++ 自增运算符 ++Variable / Variable++ ++n(先n自增,再取n的值) / n++(先取n的值,再n自增)
-- 自减运算符 --Variable / Variable-- --n(先n自减,再取n的值) / n--(先取n的值,再n自减)
* 取值运算符 *Pointer *personPointer
& 取地址运算符 &Variable &person
! 逻辑非运算符 !Expression !person.isMale
~ 取反运算符 ~Expression 1 变 0, 0 变 1; ~0100 0011 = 1011 1100
sizeof 长度运算符 sizeof(Expression) sizeof(person)
/ Expression / Expression 3 / 4
* Expression * Expression 3 * 4
% 余数(取模) Expression % Expression 3 % 4
+ Expression + Expression 3 + 4
- Expression - Expression 3 - 4
<< 左移 Variable << Expression 0100 0011 << 2 = 0000 1100
>> 右移 Variable >> Expression 0100 0011 >> 1 = 0010 0001
> 大于 Expression > Expression 4 > 3
>= 大于等于 Expression >= Expression 4 >= 3
< 小于 Expression < Expression 3 < 4
<= 小于等于 Expression <= Expression 3 <= 4
== 等于 Expression == Expression 3 == 3
!= 不等于 Expression != Expression 3 != 4
& 按位与 Expression & Expression x & 0 = 0, 1 & 1 = 1; 0000 0011 & 0000 0010 = 0000 0010
^ 按位亦或 Expression ^ Expression 同 0 异 1; 0000 0011 & 0000 0010 = 0000 0001
| 按位或 Expression | Expression x | 1 = 1, 0 | 0 = 0; 0000 0011 | 0000 0010 = 0000 0011
&& 逻辑与 Expression && Expression true && false, && 和 & 的区别: && 会提前短路
|| 逻辑或 Expression || Expression true || false
?: 条件运算符 Expression ? Expression : Expression 3 > 4 ? true : false
= 赋值运算符 Variable = Expression person.age = 18
/= 除后赋值 Variable /= Expression person.age /= 18
= 乘后赋值 Variable *= Expression person.age *= 18
%= 取模后赋值 Variable %= Expression person.age %= 18
+= 加后赋值 Variable += Expression person.age += 18
-= 减后赋值 Variable -= Expression person.age -= 18
<<= 左移后赋值 Variable <<= Expression x <<= 3
>>= 右移后赋值 Variable >>= Expression x >>= 3
&= 按位与后赋值 Variable &= Expression x &= 3
^= 按位亦或后赋值 Variable ^= Expression x ^= 3
|= 按位或后赋值 Variable |= Expression x |= 3
, 逗号运算符 Expression, Expression, Expression x = 3, y = 4, z = 5

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