The unordered_multiset::bucket_size() is a built-in function in C++ STL which returns the number of elements in the bucket which has the element val. It will always be lower than the bucket_count. The number of elements in a bucket influences the time it takes to access a particular element in the bucket
Syntax:
unordered_multiset_name.bucket_size(val)
Parameters: The function accepts a parameter val which specifies the element whose size of the bucket is to be returned.
Return Value: It returns an unsigned integral type which denotes the number of elements in the bucket which has the element val.
Below programs illustrate the above function:
Program 1:
// C++ program to illustrate the // unordered_multiset::bucket_size() function #include <bits/stdc++.h> using namespace std;
int main()
{ // declaration
unordered_multiset< int > sample;
// inserts element
sample.insert(11);
sample.insert(11);
sample.insert(11);
sample.insert(12);
sample.insert(13);
sample.insert(13);
sample.insert(14);
for ( auto it = sample.begin(); it != sample.end(); it++) {
cout << "The bucket size in which " << *it
<< " is " << sample.bucket_size(*it) << endl;
}
return 0;
} |
The bucket size in which 14 is 1 The bucket size in which 11 is 3 The bucket size in which 11 is 3 The bucket size in which 11 is 3 The bucket size in which 12 is 1 The bucket size in which 13 is 2 The bucket size in which 13 is 2
Program 2:
// C++ program to illustrate the // unordered_multiset::bucket_size() function #include <bits/stdc++.h> using namespace std;
int main()
{ // declaration
unordered_multiset< int > sample;
// inserts element
sample.insert(1);
sample.insert(1);
sample.insert(1);
sample.insert(2);
sample.insert(3);
sample.insert(4);
sample.insert(3);
for ( auto it = sample.begin(); it != sample.end(); it++) {
cout << "The bucket size in which " << *it
<< " is " << sample.bucket_size(*it) << endl;
}
return 0;
} |
The bucket size in which 1 is 3 The bucket size in which 1 is 3 The bucket size in which 1 is 3 The bucket size in which 2 is 1 The bucket size in which 3 is 2 The bucket size in which 3 is 2 The bucket size in which 4 is 1