How can I print out C++ map values?

Question

I have a map like this:

map<string, pair<string,string> > myMap; 

And I've inserted some data into my map using:

myMap.insert(make_pair(first_name, make_pair(middle_name, last_name))); 

How can I now print out all the data in my map?

Answer 1

for(map<string, pair<string,string> >::const_iterator it = myMap.begin();     it != myMap.end(); ++it) {     std::cout << it->first << " " << it->second.first << " " << it->second.second << "\n"; } 

In C++11, you don't need to spell out map<string, pair<string,string> >::const_iterator. You can use auto

for(auto it = myMap.cbegin(); it != myMap.cend(); ++it) {     std::cout << it->first << " " << it->second.first << " " << it->second.second << "\n"; } 

Note the use of cbegin() and cend() functions.

Easier still, you can use the range-based for loop:

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