(C++) std::multimap

STL container class like a std::map, except that it can hold multiple values for one key.

Example

To add a key-value-pair, use std::multimap<T>::insert. To find a rang of values, use std::multimap<T>::equal_range. This method returns an std::pair of ?iterators.

include <map>

include <string>

include <iostream>


int main()
{
  std::multimap<std::string,std::string> questions;
  questions.insert(std::make_pair("A prime number between 10 to 20","11"));
  questions.insert(std::make_pair("A prime number between 10 to 20","13"));
  questions.insert(std::make_pair("A prime number between 10 to 20","17"));
  questions.insert(std::make_pair("A prime number between 10 to 20","19"));

  typedef std::multimap<std::string,std::string>::const_iterator Iterator;
  const std::pair<Iterator,Iterator> answers = questions.equal_range("A prime number between 10 to 20");
  for (Iterator i = answers.first; i!= answers.second; ++i)
  {
    std::cout << i->second << std::endl;
  }
}

(C++) std::multimap

Example

Code links

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