c - Printing octal literal in printf

Question

What is the proper way to print an octal literal? For example, the following works for the hex digit x but not for the octal :

printf("x66 102
");

f 2

How can this be done?

question from:https://stackoverflow.com/questions/65650265/printing-octal-literal-in-printf

Answer 1

Octal literal consists of 1 to 3 digits. 4-digit sequence like 102 is not supported. It seems this is treated as two characters: 10 and 2.

What you want may be printf("x66 102 ");. This will print f B if ASCII is used.

Quote from N1570 6.4.4.4 Character constants:

octal-escape-sequence:
octal-digit
octal-digit octal-digit
octal-digit octal-digit octal-digit

The octal digits that follow the backslash in an octal escape sequence are taken to be part of the construction of a single character for an integer character constant or of a single wide character for a wide character constant. The numerical value of the octal integer so formed specifies the value of the desired character or wide character.