How do I use std::map insert in C++11?

Can you explain how to use std::map insert in C++11?

Sure! In C++11, you can use the insert function to add elements to a std::map. You can insert a key-value pair using the syntax: map.insert({key, value});.

What happens if I try to insert a duplicate key?

If you try to insert a duplicate key, the insert function will not add the new element, and the map will remain unchanged.

Is there a way to check if a key already exists before inserting?

Yes, you can use the find method to check if a key exists. If map.find(key) != map.end(), the key is present.

Can I use emplace instead of insert?

Absolutely! The emplace method constructs the element in place and can be more efficient than insert.