The multimap::count is a built-in function in C++ STL which returns the number of times a key is present in the multimap container.
Syntax:
multimap_name.count(key)
Parameters: The function accepts one mandatory parameter key which specifies the key whose count in multimap container is to be returned.
Return Value: The function returns the number of times a key is present in the multimap container.
// C++ function for illustration // multimap::count() function #include <bits/stdc++.h> using namespace std;
int main()
{ // initialize container
multimap< int , int > mp;
// insert elements in random order
mp.insert({ 2, 30 });
mp.insert({ 1, 40 });
mp.insert({ 2, 60 });
mp.insert({ 2, 20 });
mp.insert({ 1, 50 });
mp.insert({ 4, 50 });
// count the number of times
// 1 is there in the multimap
cout << "1 exists " << mp.count(1)
<< " times in the multimap\n" ;
// count the number of times
// 2 is there in the multimap
cout << "2 exists " << mp.count(2)
<< " times in the multimap\n" ;
return 0;
} |
Output:
1 exists 2 times in the multimap 2 exists 3 times in the multimap