c++ 取一个字节的低4位和高4位

转载：https://blog.csdn.net/mikasoi/article/details/84311620

1 unsigned char low_four, high_four;
2 high_four = (byte & 0xf0) >> 4;
3 low_four = byte & 0x0f;

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原文地址：https://www.cnblogs.com/Toya/p/13953967.html