Loop through map 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

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

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;
}

Loop through map c++

for (auto i = myMap.begin(); i != myMap.end(); ++i) {
  cout << i->first << ": " << i->second << endl;
  
}

C++ iterate map

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

Similar codes

0 vote311 views1 answer
Store array in vector
C++
1 vote326 views1 answer
Gmod hitman job code
C++
1 vote334 views1 answer
Std::string to qstring
C++
0 vote341 views1 answer
How to convert n space separated integers in c++
C++
0 vote291 views1 answer
C++ code executio canntot proceed because glew32.dll was not founud
C++
0 vote332 views1 answer
C++ compare time
C++
0 vote337 views1 answer
Walk filesystem in c++
C++
1 vote315 views1 answer
Marksheet make in the c++
C++
0 vote325 views1 answer
Disallowcopy c++
C++
0 vote318 views1 answer
C++ pause linux
C++