Char: Character data, which is a kind of plastic data and occupies one byte.

Unsigned char: unsigned character data, which belongs to plastic data and occupies one byte.

Short: short plastic data, which belongs to a kind of plastic data and occupies two bytes.

Unsigned short integer: unsigned short integer data, which belongs to a kind of plastic data and occupies two bytes.

Int: plastic data, which belongs to a kind of plastic data, occupies four words.

Unsigned int: unsigned integer data, which belongs to a kind of plastic data and occupies four bytes.

Long: long integer data, which belongs to a kind of plastic data and occupies four bytes.

Unsigned long integer: unsigned long integer data, which belongs to a kind of plastic data and occupies four bytes.