C++ map iterator

How to iterate through a map in c++

//traditional way (long)
for(map<string,int>::iterator it=m.begin(); it!=m.end(); ++it)
	if(it->second)cout<<it->first<<" ";
//easy way(short) just works with c++11 or later versions
for(auto &x:m)
	if(x.second)cout<<x.first<<" ";
//condition is just an example of use

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 << '\n';
  }
}

Source: en.cppreference.com

C++ iterate map

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

Similar codes

0 vote198 views1 answer
Ternary operator rsut
C++
5 votes194 views1 answer
Qdebug
C++
9 votes187 views4 answers
Range based for loop c++
C++
0 vote179 views1 answer
SFML texture from file max size
C++
0 vote187 views1 answer
Who made c++
C++
0 vote200 views1 answer
How to concatenate two vectors in c++
C++
0 vote191 views1 answer
Windows servis from console app
C++
1 vote206 views1 answer
C++ check if cin didn't get int
C++
0 vote201 views1 answer
Madiar loh
C++
0 vote187 views1 answer
What does sultion mean in a particle model
C++