Implement 14.

14.cpp

@@ -0,0 +1,29 @@
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+class Point {
+public:
+		int x;
+		int y;
+		Point(int x, int y) {
+				this->x = x;
+				this->y = y;
+		}
+};
+
+class Point3D: public Point {
+public:
+		int z;
+		Point3D(int x, int y, int z) : Point(x,y) {
+				this->z = z;
+		}
+};
+
+
+int main() {
+		Point* a = new Point(10, 20);
+		Point3D* b = new Point3D(10, 20, 30);
+		cout << b->x << " " << b->y << " " << b->z << endl;
+}

14.cs

@@ -0,0 +1,24 @@
+using System;
+
+public class Point {
+				public int x, y;
+				public Point(int x, int y) {
+								this.x = x;
+								this.y = y;
+				}
+}
+
+public class Point3D: Point {
+				public int z;
+				public Point3D(int x, int y, int z): base(x, y) {
+								this.z = z;
+				}
+}
+
+class MainRunner {
+  static void Main() {
+						Point a = new Point(10, 20);
+						Point3D b = new Point3D(10, 20, 30);
+						Console.WriteLine(b.x + " " + b.y + " " + b.z);
+  }
+}