CPP

c++ map iterator

#include <iostream>
#include <map>
 
int main() {
  std::map<int, float> num_map;
  // calls a_map.begin() and a_map.end()
  for (auto it = num_map.begin(); it != num_map.end(); ++it) {
    std::cout << it->first << ", " << it->second << '
';
  }
}

c++ iterate map

// C++17 and above
for (auto const& [key, value] : map)
{
  // do something
}

c++ iterate map

// C++11 and onwards
for (auto const& keyValue : map)
{
  keyValue.first; // Key
  keyValue.second; // Value
}

iterate through map c++

    for (auto i : m)
        cout << i.first << "   " << i.second
             << endl;

get map element from iterator c++

// Single line to get the pair: 
std::pair<key_t, value_t> pair = *std::next(map.begin(), at);
// To get the iterator:
auto itr = std::next(map.begin(), at);