Question about variable

[dudeperfect]

Hi, I have one question.
I have created integer variable with name y. I assigned value like this:

int x = 2;
int y = x++ + x;

Later I wanted to add some more stuff into that variable like this:

y = y+2;

But it doesn't compile. Is that mean that I can't assign anything more to y? I have to write everything in one line? Tell me. Thanks :)

[Moschops]

It compiles fine.

int main()
{
int x=2;
int y = x++ + x;
y = y+2;
}

http://ideone.com/9QLER

[dudeperfect]

Oh. I put variables outside main. Is that big difference?

[Stewbond]

Putting a variable outside of main gives it a global scope which is usually not something we like to practice unless absolutely nessesary (which is almost never the case.

However, pertaining to your post, in your initialization of y you use x++. This changes the value of x. We cannot change values in the global scope as it is not part of the main program. We can only initialize values.

[dudeperfect]

So it's true, that this is quite similar to Java. Where variable, created in method is local?

[Moschops]

Please do not think in Java when coding C++. You will end up writing Java in C++, which will be truly horrible. :)