Copy std::map data to another map

Question

I have a map that\'s defined like this

 struct A
 {
  int A;
  int B;
 };
 typedef map Amap;

Then I have Amap1 and I

Answer 1

Copying one map to another can be done with operator = or the copy constructor.

E.g

map mp1; 
//fill mp1 with data
map mp2(mp1); //mp2 is a copy of mp1 (via copy-construction)
map mp3;
mp3 = mp2; // mp3 is also a copy of mp2 (via copy-assignment)