用C语言实现循环左移，右移

最新推荐文章于 2025-06-09 10:54:48 发布

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最新推荐文章于 2025-06-09 10:54:48 发布

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分类专栏： C/C++ 文章标签： c 语言

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本文介绍C51中的循环左移和右移库函数，并提供了自定义实现这些功能的方法。通过使用位操作，文章详细展示了如何进行循环移位，这对于嵌入式系统的开发非常有用。

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C51中实现循环左移、右移的库函数:

#include<intrins.h> unsigned char _crol_( unsigned char c, /*charactertorotateleft*/ unsigned char b); /*bitpositionstorotate*/ unsigned char _cror_(unsigned char ,unsigned char ); unsigned int _iror_(unsigned int ,unsigned char ); unsigned long _lror_(unsigned long ,unsigned char ); unsigned char _crol_(unsigned char ,unsigned char ); unsigned int _irol_(unsigned int ,unsigned char ); unsigned long _lrol_(unsigned long ,unsigned char )

自己实现同样的功能：

unsigned char crol(unsigned char c,unsignedb){ unsigned char left=c<<b; unsigned char right=c>>( sizeof (unsigned char )-b) unsigned char temp=left|right; return temp; } unsigned char cror(unsigned char c,unsignedb){ unsigned char right =c>>b; unsigned char left =c<<( sizeof (unsigned char )-b) unsigned char temp=left|right; return temp; }