C++ STL中的unordered_multiset bucket()函数

unordered_multiset :: bucket()是C++ STL中的内置函数，它返回给定元素所在的存储区编号。值区大小从0到bucket_count-1不等。

句法：

unordered_multiset_name.bucket(element)

参数：该函数接受单个强制性元素，该元素指定要返回其存储区编号的值。

返回值：返回一个无符号整数类型，该整数类型表示元素所在的存储区编号。

下面的程序说明了上述函数：

程序1：

// C++ program to illustrate the
// unordered_multiset::bucket() function
#include 
using namespace std;
  
int main()
{
  
    // declaration
    unordered_multiset sample;
  
    // inserts element
    sample.insert(10);
    sample.insert(15);
    sample.insert(15);
    sample.insert(13);
    sample.insert(13);
  
    for (auto it = sample.begin(); it != sample.end(); it++) {
        cout << "The bucket number in which " << *it
             << " is " << sample.bucket(*it) << endl;
    }
    return 0;
}

输出：

The bucket number in which 13 is 6
The bucket number in which 13 is 6
The bucket number in which 10 is 3
The bucket number in which 15 is 1
The bucket number in which 15 is 1

程式2：

// C++ program to illustrate the
// unordered_multiset::bucket() function
#include 
using namespace std;
  
int main()
{
  
    // declaration
    unordered_multiset sample;
  
    // inserts element
    sample.insert('a');
    sample.insert('a');
    sample.insert('b');
    sample.insert('b');
    sample.insert('c');
    sample.insert('c');
    sample.insert('e');
  
    for (auto it = sample.begin(); it != sample.end(); it++) {
        cout << "The bucket number in which " << *it
             << " is " << sample.bucket(*it) << endl;
    }
    return 0;
}

输出：

The bucket number in which e is 16
The bucket number in which a is 12
The bucket number in which a is 12
The bucket number in which b is 13
The bucket number in which b is 13
The bucket number in which c is 14
The bucket number in which c is 14

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