How do I use std::equal in C++?

Can you explain how to use std::equal in C++?

Sure! std::equal is used to compare two ranges for equality. It checks if the elements in both ranges are the same.

What are the parameters for std::equal?

It takes two pairs of iterators as parameters, representing the ranges to compare. Optionally, you can provide a binary predicate.

Can you give me a code example?

Of course! Here's a simple example:

#include <iostream>
#include <algorithm>
#include <vector>

int main() {
    std::vector<int> vec1 = {1, 2, 3};
    std::vector<int> vec2 = {1, 2, 3};
    bool areEqual = std::equal(vec1.begin(), vec1.end(), vec2.begin());
    std::cout << "Are the vectors equal? " << (areEqual ? "Yes" : "No") << std::endl;
    return 0;
}

What happens if the ranges are of different sizes?

If the ranges are of different sizes, std::equal will return false, as it requires both ranges to have the same number of elements.