Check if two stacks are the same using C++

// C++ program to check if the given
// stacks are equal or not
 
#include <bits/stdc++.h>
using namespace std;
 
// Function to check if the two given
// stacks are same
bool isSameStack(stack<string> stack1, stack<string> stack2)
{
    // Create a flag variable
    bool flag = true;
 
    // Check if size of both stacks are same
    if (stack1.size() != stack2.size()) {
        flag = false;
        return flag;
    }
 
    // Until the stacks are not empty
    // compare top of both stacks
    while (stack1.empty() == false) {
        // If the top elements of both stacks
        // are same
        if (stack1.top() == stack2.top()) {
            // Pop top of both stacks
            stack1.pop();
            stack2.pop();
        }
        else {
            // Otherwise, set flag to false
            flag = false;
            break;
        }
    }
 
    // Return flag
    return flag;
}
 
// Driver Code
int main()
{
    // Creating stacks
    stack<string> stack1;
    stack<string> stack2;
 
    // Inserting elements to stack1
    stack1.push("Geeks");
    stack1.push("4");
    stack1.push("Geeks");
    stack1.push("Welcomes");
    stack1.push("You");
 
    // Inserting elements to stack2
    stack2.push("Geeks");
    stack2.push("4");
    stack2.push("Geeks");
    stack2.push("Welcomes");
    stack2.push("You");
 
    if (isSameStack(stack1, stack2))
        cout << "Stacks are Same";
    else
        cout << "Stacks are not Same";
 
    return 0;
}
Source: www.geeksforgeeks.org
C++相关代码片段
