Description : The map::count() is a function which returns 1 if the element with key K is present in the map container. It returns 0 if the element with key K is not present in the container. Syntax: map_name.count(key k);
Example :
// Demonstrates count()
#include <iostream>
#include <map>
int main() {
// declaration of map container
std::map<char, int> mymap;
mymap['a'] = 1;
mymap['b'] = 2;
mymap['c'] = 3;
// using count() function
std::cout<<mymap.count('a')<<endl;
std::cout<<mymap.count('b')<<endl;
std::cout<<mymap.count('d')<<endl;
return 0;
}