如何获得 SHORT 的高位和低位? [英] How do I get the high- and low-order bits of a SHORT?

问题描述

函数 GetKeyState() 返回一个包含键状态的 SHORT(高位向上/向下，低位切换).我如何获得这些值?

The function GetKeyState() returns a SHORT that contains the key's state (up/down in the high-order bit, and toggled in the low-order). How do I get those values?

推荐答案

简单的位操作即可.SHORT 是 16 位整数，因此要获取低位和高位，您可以执行以下操作:

Simple bit manipulation will work. SHORTs are 16-bit integers, so to get the low- and high-order bits you can do the following:

lowBit = value & 1;
highBit = ((unsigned short) value) >> 15;

另外，请注意 LOBYTE 和 HIBYTE 宏用于将 SHORT 分成低位和高位字节，而不是测试字节中的单个位.

Also, note that the LOBYTE and HIBYTE macros are used to break SHORTs into low- and high-order bytes, not to test individual bits in a byte.

这篇关于如何获得 SHORT 的高位和低位?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IT屋！