How do you copy a stack element?

Clone a stack without extra space

1. Initialize a variable count to 0.
2. Pop the top element from the source stack and store it in variable topVal.
3. Now pop the elements from the source stack and push them into the dest stack until the length of the source stack is equal to count.

How do you get to the top element of a stack?

stack::top() function is an inbuilt function in C++ STL, which is defined in header file. top() is used to access the element at the top of the stack container. In a stack, the top element is the element that is inserted at the last or most recently inserted element.

What is the index of the top element of stack?

We keep track of where we are going to be inserting with a special index called top . That is, the top is the index of the most recently added item. Thus, when the stack is empty, top == -1. Let us write methods which insert, remove, and access our stack.

What is top of stack in C?

Stacks are a type of container adaptors with LIFO(Last In First Out) type of work, where a new element is added at one end called the top of the stack, and an element is removed from the same end only. stack::top() top() function is used to reference the top(or the newest) element of the stack.

How do I copy one stack to another in C++?

1. POP the original stack .
2. EnQueue the popped element in the queue.
3. repeat the step 1 and 2 till stack is not empty.
4. Now reverse the queue.
5. DeQueue the elements one by one and push it to the Original and the New stack.
6. repeat until queue is not empty.

How do I print a top of stack?

Below are the steps:

1. Push the top element from the given stack into a linked list stack.
2. Print the top element of the singly linked list stack.
3. Pop the top element from the given primary stack.
4. Repeat the above steps in order until the given stack is empty.

What is the difference between stack top and stack top 1?

top-1 represents the top element in the stack and stack. top represents the size of the stack.

What is top current top value and values in the stack?

C++ stack top() function The top element is the one which was recently added on the stack. The last added element is the top element. Of all the elements that are present in a stack the top element stands out and is more significant as all the major operations on the stack are performed at the top element.

Can you copy a stack in C++?

C++ Stack Library – stack() Function The C++ copy constructor std::stack::stack() constructs a stack with copy of each elements present in another stack.

Can we assign one stack to another?

Yes, it is possible, but it is going to take O(N^2) . Consider stacks S (source) and T (target).