unordered_set_name_.load_factor()

// C++ program to illustrate the
// unordered_set::load_factor() function
#include <iostream>
#include <unordered_set>
using namespace std;
 
int main()
{
    // 声明
    unordered_set<int> sample;
 
    // 插入元素
    sample.insert(1);
    sample.insert(11);
    sample.insert(111);
    sample.insert(12);
    sample.insert(13);
 
    cout << "大小为: " << sample.size();
    cout << "\nbucket_count 为: " << sample.bucket_count();
 
    cout << "\n负载系数为: " << sample.load_factor();
 
    sample.insert(2);
    sample.insert(22);
 
    cout << "\n\n大小为: " <<
        sample.size();
 
    cout << "\nbucket_count 为: " <<
        sample.bucket_count();
 
    cout << "\n负载系数为: " <<
        sample.load_factor();
 
    sample.insert(33);
 
    cout << "\n\n大小为: " << sample.size();
 
    cout << "\nbucket_count 为: " <<
        sample.bucket_count();
 
    cout << "\n负载系数为: " << sample.load_factor();
    return 0;
}  

大小为: 5
bucket_count 为: 7
负载系数为: 0.714286

大小为: 7
bucket_count 为: 17
负载系数为: 0.411765

大小为: 8
bucket_count 为: 17
负载系数为: 0.470588

// C++程序，演示unordered_set::load_factor()函数
#include <iostream>
#include <unordered_set>
using namespace std;
 
int main()
{
 
    // 声明unordered_set
    unordered_set<char> sample;
 
    // 插入元素
    sample.insert('a');
    sample.insert('b');
    sample.insert('c');
    sample.insert('r');
    sample.insert('d');
 
    cout << "大小为: " << sample.size();
    cout << "\n桶个数为: "
        << sample.bucket_count();
 
    cout << "\n负载因子为: "
        << sample.load_factor();
 
    sample.insert('f');
    sample.insert('k');
 
    cout << "\n\n大小为: "
        << sample.size();
 
    cout << "\n桶个数为: "
        << sample.bucket_count();
 
    cout << "\n负载因子为: "
        << sample.load_factor();
 
    sample.insert('z');
 
    cout << "\n\n大小为: "
        << sample.size();
 
    cout << "\n桶个数为: "
        << sample.bucket_count();
 
    cout << "\n负载因子为: "
        << sample.load_factor();
    return 0;
}  

大小为: 5
桶个数为: 7
负载因子为: 0.714286

大小为: 7
桶个数为: 17
负载因子为: 0.411765

大小为: 8
桶个数为: 17
负载因子为: 0.470588