What is the "-->" operator in C/C++?
-->
is not an operator. It is in fact two separate operators, --
and >
.
The conditional's code decrements x
, while returning x
's original (not decremented) value, and then compares the original value with 0
using the >
operator.
To better understand, the statement could be written as follows:
while( (x--) > 0 )
Or for something completely different... x
slides to 0
.
while (x --\ \ \ \ > 0) printf("%d ", x);
Not so mathematical, but... every picture paints a thousand words...
That's a very complicated operator, so even ISO/IEC JTC1 (Joint Technical Committee 1) placed its description in two different parts of the C++ Standard.
Joking aside, they are two different operators: --
and >
described respectively in §5.2.6/2 and §5.9 of the C++03 Standard.