prawie zrobione zadania

uczelnia/2_semestr/programowanie/laby/lab10/zad4.cpp

@@ -0,0 +1,54 @@
+#include <cmath>
+#include <iostream>
+#include <memory>
+#include <vector>
+
+class Figura {
+public:
+  virtual float pole() const = 0;
+  virtual float obwod() const = 0;
+  virtual ~Figura() = default;
+};
+
+class Kolo : public Figura {
+  float r;
+
+public:
+  Kolo(float r) : r(r) {}
+
+  float pole() const override { return M_PI * r * r; }
+  float obwod() const override { return M_PI * 2 * r; }
+};
+
+class Prostokat : public Figura {
+  float a, b;
+
+public:
+  Prostokat(float a, float b) : a(a), b(b) {}
+
+  float pole() const override { return a * b; }
+  float obwod() const override { return 2 * a + 2 * b; }
+};
+
+class Trojkat : public Figura {
+  float a, b, c, h;
+
+public:
+  Trojkat(float a, float b, float c, float h) : a(a), b(b), c(c), h(h) {}
+
+  float pole() const override { return (a * h) * 0.5; }
+  float obwod() const override { return a + b + c; }
+};
+
+int main() {
+  std::vector<std::unique_ptr<const Figura>> figury;
+  figury.push_back(std::make_unique<Kolo>(2.0));
+  figury.push_back(std::make_unique<Prostokat>(2, 3));
+  figury.push_back(std::make_unique<Trojkat>(1, 2, 3, 4));
+
+  for (std::unique_ptr<const Figura> &element : figury) {
+    std::cout << "Obwod figury to: " << element->obwod() << std::endl;
+    std::cout << "Pole figury to: " << element->pole() << std::endl;
+    ;
+  }
+}