在地图中查找键值

Question

I am using an iterator in a for loop to traverse a map that has keys of type int. How would I be able to access the value of the key at the specific iteration, so that I can use it later?

Answer 1

Dereferencing the iterator gives you a key-value pair, std::pair<key_type, mapped_type> .

So to get the key from the iterator, get the first element of the pair:

key_type key = it->first;