Show how to iterate over the key-value pairs of an associative array, and print each pair out.

Also show how to iterate just over the keys, or the values, if there is a separate way to do that in your language.



See also

 Array
 Associative array: Creation, Iteration
 Collections
 Compound data type
 Doubly-linked list: Definition, Element definition, Element insertion, List Traversal, Element Removal
 Linked list
 Queue: Definition, Usage
 Set
 Singly-linked list: Element definition, Element insertion, List Traversal, Element Removal
 Stack


#include <iostream>
#include <map>
#include <string>
 
int main() {
  std::map<std::string, int> dict {
    {"One", 1},
    {"Two", 2},
    {"Three", 7}
  };
 
  dict["Three"] = 3;
 
  std::cout << "One: " << dict["One"] << std::endl;
  std::cout << "Key/Value pairs: " << std::endl;
  for(auto& kv: dict) {
    std::cout << "  " << kv.first << ": " << kv.second << std::endl;
  }
 
  return 0;
}