Cpp Std Map Example

Use the merge member function to join elements of two map objects in c++ ; Following is the declaration for std::map::at() function form std::map header. Visual c++ original kb number:

The std::map object is one of the associative containers in the c++ standard template library, and it implements a sorted data structure, storing key values. Map <int, int>::iterator m1_iter, m3_iter, m4_iter. A map is used to store key value pairs.

Also, the keys are assigned dynamically which results in better memory management than any trivial ds (like, arrays).

Note that using the operator[] on the map will actually insert a new value with the queried key into the map. Int main {map < int, string > students; Maps are widely used because of its freedom of datatype assignment. Use the merge member function to join elements of two map objects in c++ ;