Output of C++ code

Question

Can someone explain the output of this code?

#include <iostream>
using namespace std;

int main() {
int a = 200, b = 100;
int *p = &a, *q = &b;
p = q;
*p = 300;
cout << b << a;
return 0;
}

If I take out the line
p=q;
then it makes sense, but that line is really confusing me.

Answer 1

p = q means p is now pointing to what q points to.

You can think of it as p = &b;

Answer 2

CarrieForle Ah! That makes sense, thank you.