按位运算的有符号和无符号之间的区别

部门取模右移比较(平等除外)全角乘法(在程序集之外罕见)与签名无关的操作是:添加减法否定(-x表示~x + 1)按位和按位或按位异或按位不((~x表示-x - 1)左移乘法比较(仅限平等)Is there any difference between signed and unsigned variables on bitwise operations?For example,when dealing with unsigned numbers:AND 00000111, 00001101will result 00000101.But what would happen when dealing with signed numbers? 解决方案 Assuming 2's complement is used for signed numbers, operations that care about signedness (ie they are different for the signed and unsigned interpretation of a bitstring) are:divisionmoduloright shiftcomparisons (except equality)double-width multiplication (rare outside of assembly)Operations for which signedness is irrelevant are:additionsubtractionnegation (-x means ~x + 1)bitwise andbitwise orbitwise xorbitwise not (~x means -x - 1)left shiftmultiplicationcomparison (equality only) 这篇关于按位运算的有符号和无符号之间的区别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！