'Added C++ classes for the same task (Figure, Square...);'

cpp/Figure.cpp

@@ -0,0 +1,19 @@
+//
+// Created by ahypki on 28.03.23.
+//
+
+#include "Figure.h"
+
+namespace ahypki {
+    std::string Figure::getName() {
+        return this->name;
+    }
+
+    void Figure::setName(std::string newName) {
+        this->name = newName;
+    }
+
+    double Figure::computeArea() {
+        return 0.0;
+    }
+} // ahypki

cpp/Figure.h

@@ -0,0 +1,23 @@
+//
+// Created by ahypki on 28.03.23.
+//
+#include <iostream>
+
+#ifndef TESTCPPPROGOBIE_FIGURE_H
+#define TESTCPPPROGOBIE_FIGURE_H
+
+namespace ahypki {
+
+    class Figure {
+    private:
+        std::string name = "Unknown figure";
+    public:
+        std::string getName();
+        void setName(std::string newName);
+        virtual double computeArea();
+        virtual double pureVirtualComputeArea() = 0;
+    };
+
+} // ahypki
+
+#endif //TESTCPPPROGOBIE_FIGURE_H

cpp/Square.cpp

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+//
+// Created by ahypki on 28.03.23.
+//
+
+#include "Square.h"
+
+namespace ahypki {
+    Square::Square() {
+        setName("Square");
+    }
+
+    Square::Square(double x) {
+        setName("Square");
+        setX(x);
+    }
+
+    double Square::getX() {
+        return x;
+    }
+
+    void Square::setX(double newX) {
+        x = newX;
+    }
+
+    double Square::computeArea() {
+        return getX() * getX();
+    }
+
+    double Square::pureVirtualComputeArea() {
+        return getX() * getX();
+    }
+} // ahypki

cpp/Square.h

@@ -0,0 +1,26 @@
+//
+// Created by ahypki on 28.03.23.
+//
+
+#include "Figure.h"
+
+#ifndef TESTCPPPROGOBIE_SQUARE_H
+#define TESTCPPPROGOBIE_SQUARE_H
+
+namespace ahypki {
+
+    class Square : public Figure {
+    private:
+        double x;
+    public:
+        Square();
+        Square(double x);
+        void setX(double x);
+        double getX();
+        virtual double computeArea();
+        virtual double pureVirtualComputeArea();
+    };
+
+} // ahypki
+
+#endif //TESTCPPPROGOBIE_SQUARE_H

cpp/main.cpp

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+#include <iostream>
+#include "Figure.h"
+#include "Square.h"
+
+int main() {
+    std::cout << "Hello, World!" << std::endl;
+
+//    ahypki::Figure figure = ahypki::Figure();
+//    std::cout << "Default name: " << figure.getName() << std::endl;
+//
+//    figure.setName("Next name");
+//    std::cout << "New name: " << figure.getName() << std::endl;
+
+    ahypki::Square s = ahypki::Square(10);
+    std::cout << s.getName()
+                << " has x= " << s.getX()
+                << " has area= " << s.computeArea()
+                << std::endl;
+
+
+    return 0;
+}