Why is this c++ working? (variables with the same name)

Question

Alright, I wanna know why this code is working, I just realized that I have two variables with the same name within the same scope.

I\'m using g++ (gcc 4.4).

Answer 1

The k in the inner for loop shadows (or hides) the k in the outer for loop.

You can declare multiple variables with the same name at different scopes. A very simple example would be the following:

int main()
{
    int a;       // 'a' refers to the int until it is shadowed or its block ends
    { 
        float a; // 'a' refers to the float until the end of this block
    }            // 'a' now refers to the int again
}