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uczelnia/2_semestr/programowanie/laby/lab11/zad1.cpp

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+#include <cmath>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <vector>
+
+class Ksztalt {
+public:
+  virtual ~Ksztalt() = default;
+  virtual double pole() = 0;
+  virtual std::string opis() = 0;
+};
+
+class Kolo : public Ksztalt {
+  int r;
+
+public:
+  Kolo(int r) : r(r) {}
+
+  double pole() override { return r * r * M_PI; }
+  std::string opis() override { return "To jest koło";}  
+
+  ~Kolo() override {}
+};
+
+class Trojkat : public Ksztalt {
+  int a, h;
+
+public:
+  Trojkat(int a, int h) : a(a), h(h) {}
+
+  double pole() override { return a * h * 0.5; }
+  std::string opis() override { return "To jest trójkąt";}   
+
+  ~Trojkat() override {}
+};
+
+class Kwadrat : public Ksztalt {
+  int a;
+
+public:
+  Kwadrat(int a) : a(a) {}
+
+  double pole() override { return a * a; }
+  std::string opis() override { return " To jest kwadrat"; }
+
+  ~Kwadrat() override {}
+};
+
+double sum_pole(std::vector<std::unique_ptr<Ksztalt>> &vec) {
+  double sum = 0;
+  for (auto &ksztalt : vec) {
+    sum += ksztalt->pole();
+  }
+  return sum;
+}
+
+int main() {
+  std::vector<std::unique_ptr<Ksztalt>> vec;
+  vec.push_back(std::make_unique<Trojkat>(2, 4));
+  vec.push_back(std::make_unique<Kolo>(2));
+  vec.push_back(std::make_unique<Kwadrat>(4));
+  std::cout << "Suma pól wszystkich figur to: " << sum_pole(vec) << std::endl;
+}