Merge pull request #231 from Pushkrajpnaik/main

menu driven code for creation of stack and it's operations

october_2024/gfg_potd_31oct_2024_stack.cpp

@@ -0,0 +1,96 @@
+#include <iostream>
+#include <vector>
+
+class Stack {
+private:
+    std::vector<int> data;
+
+public:
+    void push(int value) {
+        data.push_back(value);
+    }
+
+    void pop() {
+        if (!data.empty()) {
+            data.pop_back();
+        } else {
+            std::cout << "Stack is empty!" << std::endl;
+        }
+    }
+
+    int top() const {
+        if (!data.empty()) {
+            return data.back();
+        }
+        std::cerr << "Stack is empty!" << std::endl;
+        return -1; // or any error code
+    }
+
+    bool isEmpty() const {
+        return data.empty();
+    }
+
+    int size() const {
+        return data.size();
+    }
+
+    void display() const {
+        if (data.empty()) {
+            std::cout << "Stack is empty!" << std::endl;
+            return;
+        }
+        std::cout << "Stack elements: ";
+        for (int i = data.size() - 1; i >= 0; i--) {
+            std::cout << data[i] << " ";
+        }
+        std::cout << std::endl;
+    }
+};
+
+int main() {
+    Stack stack;
+    int choice, value;
+
+    do {
+        std::cout << "\nMenu:\n";
+        std::cout << "1. Push\n";
+        std::cout << "2. Pop\n";
+        std::cout << "3. Top\n";
+        std::cout << "4. Check if Empty\n";
+        std::cout << "5. Get Size\n";
+        std::cout << "6. Display Stack\n";
+        std::cout << "7. Exit\n";
+        std::cout << "Enter your choice: ";
+        std::cin >> choice;
+
+        switch (choice) {
+            case 1:
+                std::cout << "Enter value to push: ";
+                std::cin >> value;
+                stack.push(value);
+                break;
+            case 2:
+                stack.pop();
+                break;
+            case 3:
+                std::cout << "Top element: " << stack.top() << std::endl;
+                break;
+            case 4:
+                std::cout << (stack.isEmpty() ? "Stack is empty." : "Stack is not empty.") << std::endl;
+                break;
+            case 5:
+                std::cout << "Stack size: " << stack.size() << std::endl;
+                break;
+            case 6:
+                stack.display();
+                break;
+            case 7:
+                std::cout << "Exiting..." << std::endl;
+                break;
+            default:
+                std::cout << "Invalid choice. Please try again." << std::endl;
+        }
+    } while (choice != 7);
+
+    return 0;
+}