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authorMarti Bolivar <mbolivar@mit.edu>2010-11-29 01:49:26 -0500
committerMarti Bolivar <mbolivar@mit.edu>2010-11-29 01:49:26 -0500
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+.. highlight:: cpp
+
+.. _lang-compoundarithmetic:
+
+Compound Arithmetic Operators (``+=`` , ``-=``, ``*=``, ``/=``)
+===============================================================
+
+These oparators perform a mathematical operation on a variable with
+another constant or variable. These operators are just a convenient
+shorthand::
+
+ x += y; // equivalent to the expression x = x + y;
+ x -= y; // equivalent to the expression x = x - y;
+ x *= y; // equivalent to the expression x = x * y;
+ x /= y; // equivalent to the expression x = x / y;
+
+Here is an example::
+
+ int x = 2;
+ int y = 10;
+
+ x += 4; // x now contains 6
+ x -= 3; // x now contains 3
+ x *= y; // x now contains 30
+ x /= 2; // x now contains 15
+ x += max(20, 6); // x now contains 35
+ x -= sq(5); // x now contains 15
+
+Parameters
+----------
+
+**x**: a numeric variable
+
+**y**: a numeric variable, number constant, or any other expression
+that evaluates to a number (e.g. call to a function that returns a
+number).
+
+See Also
+--------
+
+- :ref:`Arithmetic operators <lang-arithmetic>`
+
+
+.. include:: cc-attribution.txt