Question

What I am trying to do is convert this C++ function to Java:

void print(int x[], int l)
{
     if (l != 0) {
         cout << x[0] << ",";
     print(x+1,l-1);
     }
}

This is what I am trying to do, but it won’t work:

void print(int x[])
{
     if (x.length != 0) {
         cout << x[0] << ",";
         print(x + 1); //<--- ERROR!
     }
}

Does anybody have any ideas?

Answer 1

Java does not have pointers in the same way as C++. That is, you can’t “move” the array pointer x further along the array. What I would suggest is passing a starting index to your function something like this:

void print(int x[], int start)
{
    if (start < x.length) {
        if (start > 0) {
            System.out.println(x[start] + ",");
        }
        print(x, start + 1);
    }
}