getters for statelist; move classes;

pr6.cpp

@@ -4,30 +4,6 @@
 
 using namespace std;
 
-class State {
-public:
-    string name;
-    string capital;
-    string language;
-    long population;
-    double area;
-
-    State() : name(""), capital(""), language(""), population(0), area(0.0) {}
-    State(string n, string c, string l, long p, double a)
-        : name(n), capital(c), language(l), population(p), area(a) {}
-
-    friend ostream& operator<<(ostream& os, const State& state) {
-        os << "State: " << state.name << ", Capital: " << state.capital
-            << ", Language: " << state.language << ", Population: " << state.population
-            << ", Area: " << state.area;
-        return os;
-    }
-
-    bool operator==(const State& other) const {
-        return name == other.name;
-    }
-};
-
 template<class T>
 class Element {
 protected:
@@ -57,6 +33,7 @@ public:
 
     template<class T1> friend class LinkedList;
     template<class T1> friend class DoublyLinkedStack;
+    template<class T1> friend ostream& operator<<(ostream& s, const Element<T1>& el);
 };
 
 template<class T1>
@@ -79,6 +56,8 @@ public:
     virtual Element<T>* push(const T& value) = 0;
 
     bool isEmpty() { return count == 0; }
+    //getter
+    Element<T>* getHead() const { return head; }
 
     virtual ~LinkedList() {
         cout << "\nBase class destructor\n";
@@ -389,6 +368,83 @@ public:
     }
 };
 
+class State {
+protected:
+    string name;
+    string capital;
+    string language;
+    long population;
+    double area;
+
+public:
+
+
+    State() : name(""), capital(""), language(""), population(0), area(0.0) {}
+    State(string n, string c, string l, long p, double a)
+        : name(n), capital(c), language(l), population(p), area(a) {}
+
+    friend ostream& operator<<(ostream& os, const State& state) {
+        os << "State: " << state.name << ", Capital: " << state.capital
+            << ", Language: " << state.language << ", Population: " << state.population
+            << ", Area: " << state.area;
+        return os;
+    }
+
+    bool operator==(const State& other) const {
+        return name == other.name;
+    }
+    // geters
+    string getName() const { return name; }
+    double getArea() const { return area; }
+};
+
+
+class StateList {
+protected:
+    SinglyLinkedListQueue<State> stateList;
+
+public:
+    // Добавление нового государства в начало списка
+    void addState(const State& state) {
+        stateList.push(state);
+    }
+
+    // Удаление государства из начала списка
+    State removeState() {
+        Element<State>* element = stateList.pop();
+        if (element) {
+            State state = element->getInfo();
+            delete element;
+            return state;
+        }
+        throw logic_error("State list is empty");
+    }
+
+    // Поиск государства по названию
+    State findStateByName(const string& name) {
+        Element<State>* current = stateList.getHead();
+        while (current) {
+            if (current->getInfo().getName() == name) {
+                return current->getInfo();
+            }
+            current = current->getNext();
+        }
+        throw logic_error("State not found");
+    }
+
+    // Фильтрация государств по площади
+    void printStatesByArea(double minArea, double maxArea) {
+        Element<State>* current = stateList.getHead();
+        while (current != nullptr) {
+            const State& state = current->getInfo();
+            if (state.getArea() >= minArea && state.getArea() <= maxArea) {
+                cout << state << endl;
+            }
+            current = current->getNext();
+        }
+    }
+};
+
 int main() {
     DoublyLinkedStack<int> stack;
 
@@ -439,5 +495,21 @@ int main() {
     }
     cout << endl;
 
+    //StateList
+    StateList stateList;
+
+    // Пример использования
+    State usa("USA", "Washington D.C.", "English", 328000000, 9833510);
+    State india("India", "New Delhi", "Hindi", 1380000000, 3287263);
+    stateList.addState(usa);
+    stateList.addState(india);
+
+    cout << "List of states:" << endl;
+    cout << stateList.findStateByName("USA") << endl;
+
+    cout << "Removing state:" << endl;
+    cout << stateList.removeState() << endl;
+
+
     return 0;
 }