Bit operator: Left shift and Right shift (Signed or unsigned? )

80 阅读 0 评论 53 点赞

我是靠谱客的博主孤独高跟鞋，这篇文章主要介绍Bit operator: Left shift and Right shift (Signed or unsigned? )，现在分享给大家，希望可以做个参考。

No matter left shift or right shift, the result's sign should always be the same as its left operand .

By default, const numbers in C/C++ is signed.

-Wsign-compare

{

unsigned int j = 3;

int k = 5;

if (j == (1 << (j))); // warning: comparison between signed and unsigned integer expressions.

if (j == ((( unsigned int)1) << (j)));

if (k == (1 << (k)));

if (k == ((( unsigned int)1) << (k))); // warning: comparison between signed and unsigned integer expressions.

if (j == (j >> 1));

if (j == (k >> 1)); // warning: comparison between signed and unsigned integer expressions.

if (k == (k >> 1));

if (k == (j >> 1)); // warning: comparison between signed and unsigned integer expressions.

}

以上就是孤独高跟鞋最近收集整理的关于Bit operator: Left shift and Right shift (Signed or unsigned? )的全部内容，更多相关Bit内容请搜索靠谱客的其他文章。

本图文内容来源于网友提供，作为学习参考使用，或来自网络收集整理，版权属于原作者所有。