Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Trigraphs in C++
The ISO-646 character set does not have all the characters of the C syntax, therefore there are some systems with keyboards and displays that cannot deal with some characters. These characters can be constructed using a sequence of 3 characters called trigraphs. In C, before any other processing takes place, each occurrence of one of the following sequences of three characters (“trigraph sequences”) is replaced by the single character.
| trigraph | replacement | trigraph | replacement | trigraph | replacement |
|---|---|---|---|---|---|
| ??= | # | ??( | [ | ??< | { |
| ??/ | \ | ??) | ] | ??> | } |
| ??’ | ˆ | ??! | | | ??- | ˜ |
They are there mostly for historical reasons. Nowadays, most modern keyboards for most languages allow access to all those characters, but this used to be a problem once with some European keyboards. This is why trigraphs were invented.
Updated on: 30-Jul-2019
177 Views
Advertisements