How to update std::map after using the find method?

Question

How to update the value of a key in std::map after using the find method?

I have a map and iterator declaration like this:

Answer 1

You can use std::map::at member function, it returns a reference to the mapped value of the element identified with key k.

std::map mymap = {
                               { 'a', 0 },
                               { 'b', 0 },
                           };

  mymap.at('a') = 10;
  mymap.at('b') = 20;