将字符指针和字符字节声明为无符号类型的，这样可以防止8位字符的符号扩展问题。

Declare character Pointers and character bytes as unsigned to avoid sign extension problems with 8-bit characters.

youdao

但是对于多字节编码，字符的字节长度随使用编码模式的不同而不同，每个字符的长度可能是一个字节或多个字节。

However, in the case of a multi-byte encoding, the length of the character in bytes varies according to the encoding used, and each character can be one or more bytes in length.

youdao

由于第一个字符是多字节的，因此会导致字符分解和错误输出。

Since the first character is multi-byte, it results in splitting the character and leads to dirty output.

youdao

- Is it a character of eight bytes -- sorry -- eight bits, eight bits, eight bits, and I've done the same picture on the board.

它是一个8字节的字符--对不起-,8位，8位，8位，我在黑板上画了个一样的图。

哈佛公开课 - 计算机科学课程节选

A string is a contiguous sequence of characters aka bytes.

字符串就是一串,字符，亦称字节。

哈佛公开课 - 计算机科学课程节选