/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

1 vote139 views1 answer
Qlabel set text color
C++
0 vote144 views1 answer
Write a CPP program to calculate sum of first N natural numbers
C++
1 vote128 views1 answer
What does the modularity mean in c++
C++
0 vote130 views1 answer
Concatenate string along with the size of the word. in c++
C++
0 vote136 views1 answer
Find min and max in array c++
C++
1 vote129 views4 answers
Return function in cpp
C++
24 votes145 views3 answers
C++ function
C++
1 vote133 views1 answer
Std::stack
C++
0 vote135 views1 answer
Create vectors of vectors c++
C++
0 vote122 views1 answer
Destin'y child
C++