labs 1-6: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

lab6/17.cpp

@@ -0,0 +1,73 @@
+#include <iostream>
+#include <math.h>
+using namespace std;
+
+class Shape {
+  int stub;
+
+public:
+  virtual void getData() { cout << "stub"; }
+
+  virtual double area() {
+    cout << "stub";
+    return 0;
+  }
+};
+
+class Triangle : public Shape {
+private:
+  double sides[3];
+
+public:
+  void getData();
+  double area();
+};
+
+void Triangle::getData() {
+  cout << "Enter 3 integers for the sides of triangle: \n";
+
+  for (int i = 0; i < 3; i++)
+    cin >> sides[i];
+}
+
+double Triangle::area() {
+  double s = (sides[0] + sides[1] + sides[2]) / 2;
+
+  return sqrt(s * (s - sides[0]) * (s - sides[1]) * (s - sides[2]));
+}
+
+class Rectangle : public Shape {
+private:
+  double l;
+  double b;
+
+public:
+  void getData();
+  double area();
+};
+
+void Rectangle::getData() {
+  cout << "Enter length of rectangle: ";
+  cin >> l;
+  cout << "Enter breadh of rectangle: ";
+  cin >> b;
+}
+
+double Rectangle::area() { return l * b; }
+
+int main() {
+  Shape *s;
+  Triangle t;
+  Rectangle r;
+
+  s = &t;
+
+  s->getData();
+  cout << "Area of the Shape: " << s->area() << endl;
+
+  s = &r;
+
+  s->getData();
+  cout << "Area of the Shape: " << s->area() << endl;
+
+}