avrC语言应用智1)

3.6 Constants Integer or long integer constants may be written in decimal form (e.g. 1234), in binary form with 0b prefix (e.g. 0b101001), in hexadecimal form with 0x prefix (e.g. 0xff) or in octal form with 0-prefix (e.g. 0777). Unsigned integer constants may have the suffix U (e.g. 10000U). Long i