Checking number of elements
suggest changeThe container std::map
has a member function empty()
, which returns true
or false
, depending on whether the map is empty or not. The member function size()
returns the number of element stored in a std::map
container:
std::map<std::string , int> rank {{"facebook.com", 1} ,{"google.com", 2}, {"youtube.com", 3}};
if(!rank.empty()){
std::cout << "Number of elements in the rank map: " << rank.size() << std::endl;
} else {
std::cout << "The rank map is empty" << std::endl;
}
Found a mistake? Have a question or improvement idea?
Let me know.
Table Of Contents