C++ iterate map

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

Cpp goiver all the map values

map<string, int>::iterator it;

for (it = symbolTable.begin(); it != symbolTable.end(); it++)
{
    std::cout << it->first    // string (key)
              << ':'
              << it->second   // string's value 
              << std::endl;
}

Source: stackoverflow.com

Cpp map iterate over keys

#include <iostream>
#include <map>

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

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

    for ( const auto &myPair : myMap ) {
        std::cout << myPair.first << "\n";
    }
}

Source: stackoverflow.com

C++ iterate map

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

Similar codes

5 votes361 views1 answer
Ue4 log float
C++
0 vote314 views1 answer
Nested conditional operator
C++
0 vote312 views1 answer
Check if a variable is tring c++
C++
0 vote356 views2 answers
Default order in set in c++
C++
0 vote355 views1 answer
Sort html elements in Jquery on condition
C++
3 votes322 views2 answers
Maximum int c++
C++
2 votes349 views2 answers
Qt qstring to float
C++
0 vote364 views1 answer
What is c++ used for
C++
0 vote427 views2 answers
Is the c++ 20 char te same as the old one
C++
0 vote314 views1 answer
Setting a number of decimals on a float on C++
C++