How to use stack function in c++

The stack function in C is used to implement the stack data structure, which is a last-in-first-out (LIFO) data structure. The stack class provides push(), pop(), top() and empty() member functions, which are used to push elements, pop elements, return the top element of the stack and check whether the stack is empty respectively. Note: The stack element type is specified by the stack template. Pushing the element will consume memory, and the element will not automatically manage memory.

Usage of stack function in C

What is stack function?

The stack function is a class template in the <stack> header file in the C standard library, which provides an implementation of a stack data structure. The stack is a last-in-first-out (LIFO) data structure.

Usage

stack functions can be used in the following ways:

#include <stack>

using namespace std;

int main() {
  // 创建一个空堆栈
  stack<int> myStack;

  // 向堆栈中压入元素
  myStack.push(1);
  myStack.push(2);
  myStack.push(3);

  // 查看堆栈顶部的元素
  cout << myStack.top() << endl; // 输出 3

  // 从堆栈中弹出顶部元素
  myStack.pop();

  // 检查堆栈是否为空
  if (myStack.empty()) {
    cout << "堆栈为空" << endl;
  } else {
    cout << "堆栈不为空" << endl;
  }

  return 0;
}

Member functions

stack class A series of member functions are provided to manage it:

• push(): Push an element to the top of the stack.
• pop(): Pop and remove an element from the top of the stack.
• top(): Returns the element at the top of the stack without popping it.
• empty(): Check if the stack is empty.

Note:

• The stack element type is specified by the <stack> template.
• The more elements you push, the more memory the stack consumes.
• Stack elements are not automatically copied or deleted, so the user is responsible for managing their memory.

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