Bracket Operator Applied to Integer

Question

Possible Duplicate:
In C arrays why is this true? a[5] == 5[a]

I came about a piece of code that indexed into a string literal this way:

#include <iostream>
using namespace std;

int main()
{
    cout << 1["52"] << endl;
    cout << 0["52"] << endl;
}

I tried searching, but you can imagine the search terms bringing up unrelated topics. Can anyone explain how this works?

I realized it probably works with any pointer, so I tested this too:

#include <iostream>
using namespace std;

int main()
{
    int a[2]; a[0] = 22; a[1] = 600; 

    cout << 1[a] << endl;
    cout << 0[a] << endl;
}