指出数值运算式的负值，或从一个数字减去一个数。
Indicates the negative value of a numeric expression or subtracts one number from another.
指出运算式中的特定数值是否有效。
Indicates whether the specified value in an expression is valid.
利用运算式值中所指定的位元数来将变数值进行向右移位，保持正负号不变，然后将结果指派给变数。
Right shifts the value of a variable by the number of bits specified in the value of an expression, maintains the sign, and assigns the result to the variable.
利用运算式值中所指定的位元数将变数值进行向右移位，不须保持正负号，然后将结果指派给变数。
Right shifts the value of a variable by the number of bits specified in the value of an expression, without maintaining sign, and assigns the result to the variable.
在变数值和运算式的值上执行位元AND，然后将结果指派给变数。
Performs a bitwise and on the value of a variable and the value of an expression and assigns the result to the variable.
在变数值和运算式的值上执行位元OR，然后将结果指派给变数。
Performs a bitwise or on the value of a variable and the value of an expression and assigns the result to the variable.
您可以在一个运算式里混合数值整数型别和浮点型别。
You can mix numeric integral types and floating-point types in an expression.
您可以在一个运算式里混合数值整数型别和浮点型别。
You can mix numeric integral types and floating-point types in an expression.
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