Round #877

Demonstrate pattern matching against a tuple (int x, int y) to classify a point as 'Origin', 'OnXAxis', 'OnYAxis', or 'Inside' the unit square.

```csharp using System; public class Program { public static string ClassifyPoint((int, int) point) { var (x, y) = point; if ((x, y) == (0, 0)) return "Origin"; else if (y == 0) return "OnXAxis"; else if (x == 0) return "OnYAxis"; else if (-1 < x && x < 1 && -1 < y && y < 1) return "Inside"; else return "Outside"; } public static void Main() { Console.WriteLine(ClassifyPoint((0, 0))); // Origin Console.WriteLine(ClassifyPoint((1, 0))); // OnXAxis Console.WriteLine(ClassifyPoint((0, 1))); // OnYAxis Console.WriteLine(ClassifyPoint((0.5, 0.5))); // Inside Console.WriteLine(ClassifyPoint((1, 1))); // Outside } } ```

```csharp using System; public class Program { public static string ClassifyPoint((int x, int y) point) { return point switch { (0, 0) => "Origin", (0, _) => "OnYAxis", (_, 0) => "OnXAxis", var (x, y) when Math.Abs(x) <= 1 && Math.Abs(y) <= 1 => "Inside", _ => "Outside" }; } public static void Main() { Console.WriteLine(ClassifyPoint((0, 0))); // Origin Console.WriteLine(ClassifyPoint((1, 0))); // OnXAxis Console.WriteLine(ClassifyPoint((0, 1))); // OnYAxis Console.WriteLine(ClassifyPoint((1, 1))); // Inside Console.WriteLine(ClassifyPoint((2, 2))); // Outside } } ``` This C# code uses pattern matching to classify a point as 'Origin', 'OnXAxis', 'OnYAxis', or 'Inside' the unit square. The `ClassifyPoint` function takes a tuple `(int x, int y)` as input and returns a string indicating the classification of the point. The `switch` expression is used to match the input point against different patterns, and the corresponding classification is returned. The `Main` function demonstrates the usage of the `ClassifyPoint` function with different input points.