411 REFERENCE · Wikibooks
C++ Language/Type/Literals/BinaryAndHexadecimal
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
The number thirteen can be written in decimal (13), hexadecimal (0x0D), octal (015), or binary (0B1101).
Additional information about binary and hex literals (includes interactive examples)