Right shifts the bits of an expression, maintaining sign.
右移表达式的位，保持符号不变。
Shifts the bits of an expression to the right, maintaining sign.
将运算式的位元向右移，保留正负号。
Shifts the bits of an expression to the right, maintaining sign, and assigns the result to the first argument.
将运算式的位元向右移，保留正负号，并将结果指派给第一个引数。
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.
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.
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。
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