When should I use a map in C++?

When should I use a map in C++?

You should use a map in C++ when you need to store key-value pairs and require fast lookups, insertions, and deletions.

What are the advantages of using a map over a vector?

Maps provide O(log n) complexity for lookups, while vectors require O(n) for searching. Maps also maintain unique keys.

Can you give me an example of using a map?

Sure! Here's a simple example:

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> ageMap;
    ageMap["Alice"] = 30;
    ageMap["Bob"] = 25;

    std::cout << "Alice's age: " << ageMap["Alice"] << std::endl;
    return 0;
}

Are there any downsides to using maps?

Yes, maps can consume more memory than vectors due to their underlying tree structure, and they may be slower for small datasets.