WitrynaThe purpose of the question is probably to see whether you understand the difference between a logical shift ( >>, <<) and an arithmetic shift (integer multiply/divide in C). You are also assuming the coding system (2's complement etc), which is not a valid thing to do. – William Morris. Oct 8, 2014 at 23:40. In computer science, a logical shift is a bitwise operation that shifts all the bits of its operand. The two base variants are the logical left shift and the logical right shift. This is further modulated by the number of bit positions a given value shall be shifted, such as shift left by 1 or shift right by n. Unlike an arithmetic shift, a logical shift does not preserve a number's sign bit or distinguish a number's exponent from its significand (mantissa); every bit in the operand is simply moved a give…
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Witryna第1讲 为什么要学习计算机系统基础 第2讲 计算机系统基本组成与基本功能 第3讲 程序开发和执行过程简介 第4讲 计算机系统层次结构 第5讲 本课程的主要学习内容 第二周 … Witryna21 lip 2024 · logicalShift 要求:将x逻辑右移n位(0<=n<=31) 操作符使用数量限制:20 思路:将x的最高位除去后右移n位(保证高位补0),然后使用 操作符手动将最高位移动到的位置置上x的最高位。 int logicalShift(int x, int n) { int a = 1 << 31; return ((x & ~a) >> n) ((!!(x & a)) << (32 + ~n)); } bitCount 要求:统计x的二进制表示中1的数量 操作符使 … de beaumont foundation
计算机系统基础(一) :程序的表示、转换与链接 Coursera
WitrynaBinary Logical Shifts MrBrownCS 50.5K subscribers Subscribe 490 52K views 5 years ago (Paper 1) OCR A Level Computer Science: Computer Systems Covering the concept of logical shifts performed on... Witryna2.3 解题思路 令x右移8*n位,使得目标为变为二进制下最低的8位,在与0xff相与,将高位清零。 3. logicalShift 3.1 实验要求 logicalShift - shift x to the right by n, using a logical shift Can assume that 0 <= n <= 31 Examples: logicalShift (0x87654321,4) = 0x08765432 Legal ops: ! ~ & ^ + << >> Max ops: 20 Rating: 3 3.2 代码 Witryna13 maj 2024 · 3、logicalShift函数. (1) 函数描述及操作要求. ① 函数功能 :将int型数据x逻辑右移n位,0 <= n <= 31,并返回结果,结果为int型数据. ② 可用操作 :! ~ & ^ … de beauvoir town london