unordered_multimap max_load_factor() function in C++ STL
Last Updated :
20 Nov, 2020
The unordered_multimap::max_load_factor() is a built-in function in C++ STL which returns the maximum load factor of the unordered_multimap container. This function also provides with an option of setting the maximum load factor.
- Syntax (To return the maximum load factor) :
unordered_multimap_name.max_load_factor()
Parameters: The function does not accept any parameters.
Return Value: It returns an integral values which denote the maximum load factor of the container.
Below programs illustrates the above function:
Program 1:
C++
#include <bits/stdc++.h>
using namespace std;
int main()
{
unordered_multimap<int, int> sample1;
sample1.insert({ 10, 100 });
sample1.insert({ 50, 500 });
cout << "The max load factor of sample1: "
<< sample1.max_load_factor();
cout << "\nKey and Elements of Sample1 are:";
for (auto it = sample1.begin(); it != sample1.end(); it++) {
cout << "{" << it->first << ", " << it->second << "} ";
}
return 0;
}
|
Output:
The max load factor of sample1: 1
Key and Elements of Sample1 are:{50, 500} {10, 100}
- Syntax (To set the maximum load factor):
unordered_multimap_name.max_load_factor(N)
Parameters: The function accepts a single mandatory parameter N which specifies the load factor to be set. This N will be the maximum load factor of the container.
Return Value: The function does not returns anything.
Below program illustrates the above function:
C++
#include <bits/stdc++.h>
using namespace std;
int main()
{
unordered_multimap<int, int> sample1;
sample1.insert({ 10, 100 });
sample1.insert({ 50, 500 });
cout << "The max load factor of elements of sample1: "
<< sample1.max_load_factor();
sample1.max_load_factor(100);
cout << "\nThe max load factor of sample1 after setting it: "
<< sample1.max_load_factor();
cout << "\nKey and Elements of Sample1 are:";
for (auto it = sample1.begin(); it != sample1.end(); it++) {
cout << "{" << it->first << ", " << it->second << "} ";
}
return 0;
}
|
Output:
The max load factor of elements of sample1: 1
The max load factor of sample1 after setting it: 100
Key and Elements of Sample1 are:{50, 500} {10, 100}
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