HP 3000 Manuals HP 3000 Manuals
Trigraph Sequences
The C source code character set is a superset of the ISO 646-1983
Invariant Code Set. To enable programs to be represented in the reduced
set, trigraph sequences are defined to represent those characters not in
the reduced set. A trigraph is a three character sequence that is
replaced by a corresponding single character. Table 7-2 gives the
complete list of trigraph sequences and their replacement characters.
Table 7-2. Trigraph Sequences and
Replacement Characters
---------------------------------------------------------------------------------------------
| | |
| Trigraph Sequence | Replacement |
| | |
---------------------------------------------------------------------------------------------
| | |
| ??= | # |
| | |
| ??/ | \ |
| | |
| ??' | ^ |
| | |
| ??( | [ |
| | |
| ??) | ] |
| | |
| ??! | | |
| | |
| ??< | { |
| | |
| ??> | } |
| | |
| ??- | ~ |
| | |
---------------------------------------------------------------------------------------------
Any ? that does not begin one of the trigraphs listed above is not
changed.
NOTE Trigraphs are replaced in ANSI mode only.