help with increment and decrement

[TV5]

hi everybody ...
can anybody tell me what is wrong with these statment

cout << ++x++;
cout << x++ + 1;<< i run it in the compiler and give me 2 ? why .. i dont hve no idea ??!!
cout << x++ + ++1;
cout << ++( x + y );

or give a hint or anything that will help and make me understand the increment and decrement "thing" because i dont get it ...

[Chervil]

i run it in the compiler and give me 2

You didn't initialise x, so the result could be anything at all.

[TV5]

i initialized as x = 1 and gave me 2 ..could you explain why ...

[Chervil]

1 2 3 4 5 6 7

int x; x = 1; cout << "A " << x++ + 1 << endl; x = 1; cout << "B " << ++x + 1 << endl;

A 2 B 3

That's the basic nature of pre-increment and postincrement.
Line A retrieves the value of x at the start. Then x is incremented afterwards.
Line B first increments x, then retrieves the value.