aboutsummaryrefslogtreecommitdiffstats
path: root/docs/source/lang/cpp/char.rst
diff options
context:
space:
mode:
authorPerry Hung <iperry@gmail.com>2011-01-24 23:23:29 -0500
committerPerry Hung <iperry@gmail.com>2011-01-24 23:23:29 -0500
commitc48689d34809943a5907884bd287cea9ae275352 (patch)
treed49ff06b0d4b81f6ab0eac8060d178ce7542476c /docs/source/lang/cpp/char.rst
parent64431fd4b59cb8656365f1fad5f679cd4d756239 (diff)
parenta9b2d70bc7799ca96c1673b18fe3012b1a4dd329 (diff)
downloadlibrambutan-c48689d34809943a5907884bd287cea9ae275352.tar.gz
librambutan-c48689d34809943a5907884bd287cea9ae275352.zip
Merge remote branch 'leaf/master'
Diffstat (limited to 'docs/source/lang/cpp/char.rst')
-rw-r--r--docs/source/lang/cpp/char.rst50
1 files changed, 50 insertions, 0 deletions
diff --git a/docs/source/lang/cpp/char.rst b/docs/source/lang/cpp/char.rst
new file mode 100644
index 0000000..b8747f3
--- /dev/null
+++ b/docs/source/lang/cpp/char.rst
@@ -0,0 +1,50 @@
+.. highlight:: cpp
+
+.. _lang-char:
+
+``char``
+========
+
+The ``char`` type stores a 1-byte character value (or integer with
+value from -128 to 127). Character literals are written in single
+quotes, like this: ``'A'`` (for multiple characters - strings - use
+double quotes: ``"ABC"``).
+
+
+Just like everything else on a computer, characters are stored as
+numbers. You can see the specific encoding in the `ASCII chart
+<http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters>`_\
+. This means that it is possible to do arithmetic on characters, in
+which the ASCII value of the character is used (e.g. ``'A' + 1`` has the
+decimal value 66, since the ASCII value of the capital letter A in
+decimal is 65). See the :ref:`Serial.println()
+<lang-serial-println>` documentation for more information about how
+characters are converted into numbers.
+
+The ``char`` datatype is a signed type, meaning that it encodes
+numbers from -128 to 127. For an unsigned type, which stores values
+from 0 to 255, just use the type ``unsigned char`` (two words).
+
+
+Example
+-------
+
+::
+
+ // the following two lines are equivalent, using the ASCII
+ // character encoding:
+ char c = 'A';
+ char c = 65;
+
+
+See also
+--------
+
+
+- :ref:`lang-int`
+- :ref:`lang-array` (a string is just an array of ``char``\ s)
+- :ref:`Serial.println() <lang-serial-println>`
+
+
+
+.. include:: cc-attribution.txt