What are some examples of using STL stacks in C++?

Can you give me some examples of using stacks in C++ with STL?

Sure! In C++, the Standard Template Library (STL) provides a stack container. Here's a simple example:

#include <iostream>
#include <stack>

int main() {
    std::stack<int> myStack;
    myStack.push(1);
    myStack.push(2);
    myStack.push(3);

    while (!myStack.empty()) {
        std::cout << myStack.top() << std::endl;
        myStack.pop();
    }
    return 0;
}

This code pushes three integers onto the stack and then pops them off, displaying them in LIFO order.

What are some common use cases for stacks?

Stacks are commonly used for:

1. Function call management (call stack)
2. Undo mechanisms in applications
3. Syntax parsing (like in compilers)
4. Backtracking algorithms (like maze solving)
5. Expression evaluation and conversion (infix to postfix)