What are some examples of range-based for loops in C++11?

Can you give me some examples of range-based for loops in C++11?

Sure! A range-based for loop allows you to iterate over elements in a container easily. 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;
}

That's great! Can you explain how it works?

Of course! In the example, for (int num : numbers) iterates over each element in the numbers vector. The variable num takes the value of each element in the vector one by one.

Can I use it with other containers like maps?

Yes, you can! For example, with a std::map, you can iterate over key-value pairs like this:

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> ages = { {"Alice", 30}, {"Bob", 25} };
    for (const auto& pair : ages) {
        std::cout << pair.first << " is " << pair.second << " years old." << std::endl;
    }
    return 0;
}