How can I access the top element of a C++ stack?

In C++, you can use the top() function to access the top element of the stack. Here is an example:

#include <iostream>
#include <stack>

int main() {
    std::stack<int> myStack;

    myStack.push(1);
    myStack.push(2);
    myStack.push(3);

    // 获取栈顶元素
    int topElement = myStack.top();
    std::cout << "栈顶元素: " << topElement << std::endl;

    return 0;
}

Output:

Produce results

栈顶元素: 3