/C++/How to iterate through a map in c++

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

Through map c++

//Since c++17
for (auto& [key, value]: myMap) {
    cout << key << " has value " << value << endl;
}
//Since c++11
for (auto& kv : myMap) {
    cout << kv.first << " has value " << kv.second << endl;
}

C++ iterate map

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

C++ map loop through key value

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> myMap;

    myMap["one"] = 1;
    myMap["two"] = 2;
    myMap["three"] = 3;

    for ( const auto &[key, value]: myMap ) {
        std::cout << key << '\n';
    }
}

Source: stackoverflow.com

Similar codes

0 vote207 views2 answers
Iostream c++
C++
2 votes186 views1 answer
How to interface c++ in haxe
C++
24 votes201 views5 answers
Install heroku
C++
-1 vote203 views1 answer
Error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
C++
-1 vote205 views2 answers
Why is my unity crashing
C++
0 vote194 views1 answer
Visual studio code terminal keeps closing c++
C++
0 vote256 views1 answer
C++ generic pointer
C++
0 vote209 views3 answers
Onoverlapbegin ue4 c++
C++
1 vote255 views2 answers
How to pause a c++ program.
C++
0 vote227 views1 answer
Colors on c++
C++