C code到计数unsigned char型的“1”比特数 [英] C code to count the number of '1' bits in an unsigned char

问题描述

我需要C code返回在C. unsigned char类型，我需要一个解释，为什么它的作品，如果它不是很明显1的数量。我发现了很多code为一个32位的号码，但没有多少unsigned char类型。

I need C code to return the number of 1's in an unsigned char in C. I need an explanation as to why it works if it's not obvious. I've found a lot of code for a 32-bit number but not much for an unsigned char.

推荐答案

同样code将为unsigned char类型的工作。遍历测试他们所有位。请参见这个。

The same code will work for an unsigned char. Loop over all bits testing them. See this.

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