How do I compare two lists in C++?

How do I compare two lists in C++?

You can compare two lists in C++ using the == operator or by iterating through them and comparing elements.

Can you show me an example of comparing two lists?

Sure! Here's a simple example:

#include <iostream>
#include <list>

int main() {
    std::list<int> list1 = {1, 2, 3};
    std::list<int> list2 = {1, 2, 3};

    if (list1 == list2) {
        std::cout << "Lists are equal.";
    } else {
        std::cout << "Lists are not equal.";
    }
    return 0;
}

What if the lists have different sizes?

If the lists have different sizes, they will not be equal. The == operator will return false in that case.

Is there a way to compare them element by element?

Yes, you can use iterators to compare them element by element. Here's an example:

auto it1 = list1.begin();
auto it2 = list2.begin();
while (it1 != list1.end() && it2 != list2.end()) {
    if (*it1 != *it2) {
        std::cout << "Lists differ at element: " << *it1 << " and " << *it2;
        break;
    }
    ++it1;
    ++it2;
}