what is diff b/w ++a and a++

[RASHMI GUPTA]

What is the diff b/w ++a and a++ in the implication in b/w the assiengment..
plz tel it in basic language..

[firedraco]

a++ first does everything on the line, and then adds 1 to a.
++a first adds 1 to a, and then does everything on the line.

(I think)

[Duthomhas]

That's backwards.

MS explains what they are
http://msdn.microsoft.com/en-us/library/e1e3921c(VS.80).aspx

C++FAQ-Lite explains what they mean
http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.9 (start reading at #9)

http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.15

Also be sure to watch your Sequence Points MS: http://msdn.microsoft.com/en-us/library/d45c7a5d.aspx
Wikipedia: http://en.wikipedia.org/wiki/Sequence_point

Good luck!

[edit]
BTW. Wrong forum.

[firedraco]

LOL so it is! Fixed post.

[Poke386]

Here's the way it is:
suppose you have something like:
a=5;
s=++a;
In this case s=6.
but when:
a=5;
s=a++;
s=5.

[Aakanaar]

that is correct, but also confusing.. to put it more plain

int a, b = 5, c;
// b++ increases b by 1 then returns the old value of b
a = b++; // a = 5, b = 6
//  So b++ increased b from 5 to 6, then returned 5 to a

// ++b increases b by 1 then returns the new value of b
c = b++; // c = 7, b = 7
// So ++b increased b from 6 to 7, then returned 7 to c 

[RASHMI GUPTA]

hey thanx..
to ol who posted rep..

they wer really useful ..