refactor: use std::shared_ptr

data_structures/test_stack_legacy.cpp

@@ -0,0 +1,61 @@
+#include <iostream>
+
+#include "./stack.hpp"
+
+int main() {
+    stack<int> stk;
+    std::cout << "---------------------- Test construct ----------------------"
+              << std::endl;
+    stk.display();
+    std::cout
+        << "---------------------- Test isEmptyStack ----------------------"
+        << std::endl;
+    if (stk.isEmptyStack()) {
+        std::cout << "PASS" << std::endl;
+    } else {
+        std::cout << "FAIL" << std::endl;
+    }
+    std::cout << "---------------------- Test push ----------------------"
+              << std::endl;
+    std::cout << "After pushing 10 20 30 40 into stack: " << std::endl;
+    stk.push(10);
+    stk.push(20);
+    stk.push(30);
+    stk.push(40);
+    stk.display();
+    std::cout << "---------------------- Test top ----------------------"
+              << std::endl;
+    int value = stk.top();
+    if (value == 40) {
+        std::cout << "PASS" << std::endl;
+    } else {
+        std::cout << "FAIL" << std::endl;
+    }
+    std::cout << "---------------------- Test pop ----------------------"
+              << std::endl;
+    stk.display();
+    stk.pop();
+    stk.pop();
+    std::cout << "After popping 2 times: " << std::endl;
+    stk.display();
+    std::cout << "---------------------- Test overload = operator "
+                 "----------------------"
+              << std::endl;
+    stack<int> stk1;
+    std::cout << "stk current: " << std::endl;
+    stk.display();
+    std::cout << std::endl << "Assign stk1 = stk " << std::endl;
+    stk1 = stk;
+    stk1.display();
+    std::cout << std::endl << "After pushing 8 9 10 into stk1:" << std::endl;
+    stk1.push(8);
+    stk1.push(9);
+    stk1.push(10);
+    stk1.display();
+    std::cout << std::endl << "stk current: " << std::endl;
+    stk.display();
+    std::cout << "Assign back stk = stk1:" << std::endl;
+    stk = stk1;
+    stk.display();
+    return 0;
+}