运算符

介绍

Operators in C++ are symbols that let you perform operations on variables and values. They include arithmetic, logical, comparison, assignment, and bitwise operators. C++ also supports increment/decrement, conditional expressions, and compound assignment. These form the core of most logic and math in any C++ program, including robotics control with VEXcode IQ.

Arithmetic

姓名	象征	操作员	例子
添加	+	a + b	5 + 3 // 8
减法	-	a - b	10 - 3 // 7
乘法	*	a * b	5 * 3 // 15
分配	/	a / b	10 / 4 // 2 (integer division)
模数	%	a % b	10 % 4 // 2
否定	-	-a	-5 // -5

Augmented Arithmetic

姓名	象征	操作员	例子
添加	+=	a += b	int a = 5; int b = 3; a += b; // a = 8
减法	-=	a -= b	int a = 10; int b = 4; a -= b; // a = 6
乘法	*=	a *= b	int a = 2; int b = 3; a *= b; // a = 6
分配	/=	a /= b	int a = 10; int b = 4; a /= b; // a = 2
模数	%=	a %= b	int a = 10; int b = 3; a %= b; // a = 1

Comparison

姓名	象征	操作员	例子
平等	==	a == b	5 == 5 // true
不等式	!=	a != b	5 != 10 // true
大于	>	a > b	10 > 5 // true
少于	<	a < b	5 < 10 // true
大于或等于	>=	a >= b	10 >= 10 // true
小于或等于	<=	a <= b	5 <= 5 // true

Logical

姓名	象征	操作员	例子
逻辑与	&&	a && b	true && false // false
逻辑或	||	a || b	false || true // true
逻辑非	!	!a	!true // false

Assignment

姓名	象征	操作员	例子
任务	=	a = b	int a = 10;

Bitwise

姓名	象征	操作员	例子
按位与	&	a & b	6 & 3 // 2 (0b110 & 0b011)
按位或	|	a | b	6 | 3 // 7 (0b110 | 0b011)
按位异或	^	a ^ b	6 ^ 3 // 5 (0b110 ^ 0b011)
按位非	~	~a	~5 // -6
左移	<<	a << b	2 << 3 // 16
右移	>>	a >> b	16 >> 2 // 4

Augmented Bitwise

姓名	象征	操作员	例子
按位与	&=	a &= b	int a = 6; a &= 3; // a = 2
按位或	|=	a |= b	int a = 6; a |= 3; // a = 7
按位异或	^=	a ^= b	int a = 6; a ^= 3; // a = 5
左移	<<=	a <<= b	int a = 5; a <<= 2; // a = 20
右移	>>=	a >>= b	int a = 20; a >>= 2; // a = 5

Ternary (Conditional)

姓名	句法	例子
条件运算符	condition ? expr1 : expr2	int a = 6; int b = 3; int max = (a > b) ? a : b;

Increment / Decrement

姓名	象征	操作员	例子
预增量	++	++a	int a = 5; int b = ++a; // a = 6, b = 6
后增量	++	a++	int a = 5; int b = a++; // a = 6, b = 5
预减	–	–a	int a = 5; int b = –a; // a = 4, b = 4
后减量	–	a–	int a = 5; int b = a–; // a = 4, b = 5