How do I use the std::algorithm library in C++17?

How do I use the std::algorithm library in C++17?

In C++17, the std::algorithm library provides a variety of algorithms for operations like sorting, searching, and manipulating data. You can include it by adding #include <algorithm> to your code.

Can you give me an example of using std::sort?

Sure! Here's a simple example:

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

int main() {
    std::vector<int> vec = {5, 3, 8, 1, 2};
    std::sort(vec.begin(), vec.end());
    for (int n : vec) {
        std::cout << n << ' ';
    }
    return 0;
}

This will sort the vector in ascending order.

What about using std::find?

You can use std::find to search for an element in a range. Here's an example:

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

int main() {
    std::vector<int> vec = {5, 3, 8, 1, 2};
    auto it = std::find(vec.begin(), vec.end(), 3);
    if (it != vec.end()) {
        std::cout << "Found: " << *it << '\n';
    } else {
        std::cout << "Not found!";
    }
    return 0;
}

This will search for the number 3 in the vector.

Are there any new features in C++17 related to algorithms?

Yes! C++17 introduced several new features, including the std::clamp function, which restricts a value to a specified range, and std::for_each_n, which applies a function to a specified number of elements.