Update stack.cpp

翻译大佬的Java代码

codes/cpp/chapter_stack_and_queue/stack.cpp

@@ -6,3 +6,33 @@
 
 #include "../include/include.hpp"
 
+int main(){
+    /* 初始化栈 */
+    stack<int> stack;
+
+    /* 元素入栈 */
+    stack.push(1);
+    stack.push(3);
+    stack.push(2);
+    stack.push(5);
+    stack.push(4);
+    cout<<"栈 stack = ";
+    PrintUtil::printStack(stack);
+
+    /* 访问栈顶元素 */
+    int top = stack.top();
+    cout<<"栈顶元素 top = "<<top<<endl;
+
+    /* 元素出栈 */
+    stack.pop();
+    cout<<"出栈元素 pop = "<< top <<"，出栈后 stack = ";
+    PrintUtil::printStack(stack);
+
+    /* 获取栈的长度 */
+    int size = stack.size();
+    cout<<"栈的长度 size = "<<size<<endl;;
+
+    /* 判断是否为空 */
+    bool empty = stack.empty();
+    return 0;
+}