explain me this please?

Question

explain me this please?
#include <iostream>
using namespace std;

int main()
{
int x = 4;
int y= ++x;
cout << y++<<y++<<y++<<"\n"<<++y;
cout<<"\n"<< x++<<x++<<x++<<"\n"<<++x;
return 0;
}
//post fix means using the variable first, then increment it but y++ is incrementing it first?same is with x ++ why does it happenning?, explain?

Answer 1

I think you should write them in separated lines

such as :
cout<<y++;
cout<<++y;

//that will be clear for you ...