C language stipulates that the char type is 1 byte integer. 1 byte is equal to 8 bits in binary, and one bit in binary is called "character" in Chinese.

The English name is bit.

"C language says that char is 16 bit" may be a misunderstanding between Chinese and English.

There is a concept of "character set". For example, in the ASCII character set, one character is 8 characters, and the Chinese double-byte coded character is 2 bytes of 16 characters. There are other coded characters in the box, which may be several bytes.

Characters are called characters in English. Someone may be confused. The character in a set is 16, but for char it becomes 16.

C language can use sizeof(char) to calculate the number of bytes occupied by char. You can output it and see:

printf("%d "，sizeof(char))；