What are some examples of using the C++ library?

What are some examples of using the C++ library?

C++ libraries provide pre-written code to help with various tasks. For example, the Standard Template Library (STL) offers data structures like vectors and algorithms for sorting.

Can you give me a specific example of using a vector?

Sure! Here's a simple example: you can create a vector to store integers and then use the push_back method to add elements. For instance:

#include <vector>
#include <iostream>

int main() {
    std::vector<int> numbers;
    numbers.push_back(10);
    numbers.push_back(20);
    std::cout << "First number: " << numbers[0] << std::endl;
    return 0;
}

What about using algorithms from the STL?

You can use algorithms like std::sort to sort a vector. For example:

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

int main() {
    std::vector<int> numbers = {5, 3, 8, 1};
    std::sort(numbers.begin(), numbers.end());
    for (int num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}