How do I use collections in C++?

How do I use collections in C++?

In C++, collections are typically managed using the Standard Template Library (STL). You can use containers like vectors, lists, and maps.

Can you give me an example of using a vector?

Sure! Here's a simple example:

#include <iostream>
#include <vector>

int main() {
    std::vector<int> numbers = {1, 2, 3, 4, 5};
    for(int num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}

What about using a map?

Here's how you can use a map in C++:

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> age;
    age["Alice"] = 30;
    age["Bob"] = 25;
    std::cout << "Alice's age: " << age["Alice"] << "\n";
    return 0;
}

Are there any performance considerations I should be aware of?

Yes, different containers have different performance characteristics. For example, vectors are great for random access, while lists are better for frequent insertions and deletions.