Operators Precedence

[Kaushik Badiyani]

Consider the following peice of code :
void meth()
{
int a=5,b=5;
System.out.println(a++ + ++b + (b=a)) // o/p is 17 ???
}
Plz outline me the precedence of operators here
Thanx
Kaushik

[Igor Gaschits]

Hi Kaushik,
If increment operator is placed BEFORE the variable, this variable will be incremented first, before doing any other operation. If increment operator is placed AFTER the variable, this variable will be processed with the next operande and then incremented. Thus, in this case:
(a++ + ++b + (b=a))
b is incremented first(6);
a is added to b(5+6=11);
a is incremented(6);
value of a is assigned to b(b now equals 6);
6 is added to 11(17)
HTH,
Igor

[Muhammad Farooq]

Here
a++ is 5 for purpose of addidtion, but then it has increased by one(to 6) as a++ is post increment,
++b = 6, as ++b is pre increment
then it add b which is assigned to be equal to a , which is equal to 6 (after increrment of one), that why 5 + 6 + 6 =17
HTH
--Farooq

[Samith Nambiar]

((a++) + (++b)) + (b=a)
i think this is how the equation can be interpreted


hope that helps
Samith.P.Nambiar
<pre>
\```/
(o o) harder u try luckier u get
-------oOO--(_)--OOo----------------------------
</pre>

[Kaushik Badiyani]

Originally posted by Samith Nambiar:
((a++) + (++b)) + (b=a)
i think this is how the equation can be interpreted

hope that helps
Samith.P.Nambiar
<pre>
\```/
(o o) harder u try luckier u get
-------oOO--(_)--OOo

My main doubt over here is wont(b=a) be executed first
Because Inner brackets r executed first..
Plz help me on this doubt

[Ashik Uzzaman]

Hi Koushik,
If u see the oprator precedence list u will find that ++ and () has the same (highest) precedence and so if both of them appear ina single expression then the order of evaluation will be from left to right. So if u change the order of appearance of () like this code u will get O/P 16 instead of 17.

class OP
{
public static void main(String []args)
{
int a=5,b=5;
System.out.println( (b=a)+a++ + ++b );
}
}

Hope it helps u.

------------------
azaman