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author | Hanna Mendes Levitin <hanna@anomaly-3.local> | 2010-12-01 03:37:07 -0600 |
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committer | Hanna Mendes Levitin <hanna@anomaly-3.local> | 2010-12-01 03:37:07 -0600 |
commit | a0549b4a15a7093f990fffa4bc1d2d52ec1c16e2 (patch) | |
tree | 9c6383570be6d045db4d8942ca3137fc3cb5b8a0 /docs/source/lang/cpp/compoundarithmetic.rst | |
parent | 3b7f16dba295da3a0071564ac284c25dc56e6b18 (diff) | |
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docs, now with style
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diff --git a/docs/source/lang/cpp/compoundarithmetic.rst b/docs/source/lang/cpp/compoundarithmetic.rst new file mode 100644 index 0000000..420f1db --- /dev/null +++ b/docs/source/lang/cpp/compoundarithmetic.rst @@ -0,0 +1,44 @@ +.. 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 |