/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 vote319 views1 answer
This is my p phone number in punjabi
C++
23 votes322 views3 answers
Flutter datetime format
C++
0 vote327 views1 answer
Max pooling in c++
C++
0 vote326 views1 answer
C if
C++
0 vote321 views1 answer
Hamming distance c++
C++
0 vote337 views1 answer
Find maximum sum of circular subarray
C++
5 votes337 views2 answers
String c++ if letter is lowercase
C++
0 vote295 views2 answers
Use c++17 g++
C++
0 vote313 views1 answer
Create a bitset of 1024 bits,
C++
5 votes328 views6 answers
Do while loop c++
C++