please explain output numbers .

Question

#include <iostream>
using namespace std;

int main() {
int x;
double y;
float a;
long b;
x = ++x;
y = ++y;
a = ++a;
b = ++b;
cout<<x<<endl;
cout<<y<<endl;
cout<<a<<endl;
cout<<b<<endl;
}

Answer 1

I thought they represent something !
every time I run ,got the same output.

Answer 2

these numbers should reflect a random number assigned to them +1 since they where never declared.

Answer 3

that's the way this app works, if you ran it on a pc or what not it should give you different outputs