What are some useful STL templates in C++?

What are some useful STL templates in C++?

The C++ Standard Library provides several useful STL templates like vector, list, map, and set. Would you like to know more about a specific one?

Can you explain how to use vectors?

Sure! Vectors are dynamic arrays that can resize themselves. You can add elements using push_back(), access elements with the [] operator, and get the size with size(). Would you like an example?

Yes, please provide an example of using a vector.

Here's a simple example:

#include <iostream>
#include <vector>

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

This code creates a vector, adds two integers, and prints the first element.

What about maps? How do they work?

Maps are associative containers that store elements in key-value pairs. You can insert elements using the [] operator or insert() method. Would you like to see a code example?