ViktorovaHW_7

ViktorovaHW7.cpp

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+#include <iostream>
+
+class Shape {
+public:
+	virtual void Draw() = 0;
+	virtual void Calc_square() = 0;
+};
+
+class Square : public Shape {
+	void Draw() { std::cout << "This is a Square" << std::endl; }
+	void Calc_square() { std::cout << "The square = side*side" << std::endl; }
+};
+
+class Triangle : public Shape {
+	void Draw() { std::cout << "This is Triangle" << std::endl; }
+	void Calc_square() { std::cout << "The square = (h*a)/2" << std::endl; }
+};
+
+class Rectangle : public Shape {
+	void Draw() { std::cout << "This is Rectangle" << std::endl; }
+	void Calc_square() { std::cout << "The square = a*b" << std::endl; }
+};
+
+void test(Shape* sh) {
+	sh->Draw();
+	sh->Calc_square();
+}
+
+int main() {
+	Square sq{};
+	test(&sq);
+	std::cout << std::endl;
+
+	Triangle tr{};
+	test(&tr);
+	std::cout << std::endl;
+
+	Rectangle re{};
+	test(&re);
+
+	return 0;
+}