What is the output of this code and why?! I think it should be 7613 but the compiler output is something else!

Question

int x,y,z;
x=5;
y=++x;
z=y++ + ++x;
cout<<x<<y<<z;

Answer 1

x = 5;
y = ++x; // <x> = 6, <y> = 6
z = y++ + ++x; // <y> = 6 <x> = 7, <z> = (6 + 7) => 13
cout << x << y << z; // <x> = 7, <y> = 7, <z> = 13

Does it help clarify?

Answer 2

Ipang the problem is as yourself wrote y is 6 before std::cout , but in the end it counted as "7"! y why shouldnt be 6?

Answer 3

Because the post-increment operation takes effect after the respective line has been processed. So the modification of <y> value is effective on the next line, where <x>, <y> and <z> are printed.