#include <map>
...
multimap<char,int> first;
first.insert(pair<char,int>('a',10));
first.insert(pair<char,int>('b',15));
first.insert(pair<char,int>('b',20));
first.insert(pair<char,int>('c',25));
Say I now want to remove one of the pairs I have just added to the map.
I have examples to remove an entire key entry, which for key 'b' would remove both 'b',15 and 'b',20.
But what is the code to remove just, say, the pair 'b',20?