Operators

[Saniya Ansari]

ok there is this question in Mughal's book.. i'm kinda confused although it seems easy..
public static void main(String args[]){
int k= 1;
int i= ++K + k++ + + k
System. out. prinln(i);
}
The answer is 7.. i'm not sure how.. HELP!

[Serdar Ozturk]

re-write the line as
i = (++k) + (k++) + (+k);
evaluation left to right:
i = 2 + (k++) + (+k) (k is incremented and assigned the value 2)
i = 2 + 2 + (+k) ( k's current value used, but with a side effect of incrementing k)
i = 2 + 2 + 3
i = 7;

Serdar

Originally posted by Saniya Ansari:
ok there is this question in Mughal's book.. i'm kinda confused although it seems easy..
public static void main(String args[]){
int k= 1;
int i= ++K + k++ + + k
System. out. prinln(i);
}
The answer is 7.. i'm not sure how.. HELP!

[Saniya Ansari]

ok.. thanks i got this much explanation from the book too but just cant' figure out how does the +k will get the value 3

[Barkat Mardhani]

The (K++) will give 2 to expression but it will increase K's value to 3. Therefore, (+K) will receive 3...
[ October 06, 2002: Message edited by: Barkat Mardhani ]

[Claire Yang]

Please check Maha Anna's wonderful explanation on the prefix/postfix operators:
http://www.javaranch.com/ubb/Forum24/HTML/000775.html
[ October 06, 2002: Message edited by: Claire Yang ]

[Valentin Crettaz]

CHeck out Brian Lugo's, too:
http://www.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=24&t=014701