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ReferenceMystery5

Language/Type: C# parameters reference semantics

The following program produces 4 lines of output. Write each line of output below as it would appear on the console.

null 
public class ReferenceMystery5
{
    public static void Main()
    {
        int[] a = new int[2];
        a[0] = 10;
        a[1] = 20;
        int b = 3;
        int c = 5;

        Mystery(a, b, c);
        Console.WriteLine(a + " " + b + " " + c);

        a[1]++;
        Mystery(a, a[0], b);
        Console.WriteLine(a + " " + b + " " + c);
    }

    public static void Mystery(int[] a, int b, int c)
    {
        b = b + c;
        for (int i = 0; i < a.length; i++)
        {
            a[i]++;
        }
        c = c + a[0];
        Console.WriteLine(a + " " + b + " " + c);
    }
}
line 1
line 2
line 3
line 4

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