unordered_set::bucket

项目
06/09/2015

获取一个键值的存储桶数字。

size_type bucket(const Key& keyval) const;

参数

keyval
映射的键值。

备注

成员函数返回当前数字存储桶与键值的 keyval。

示例

// std_tr1__unordered_set__unordered_set_bucket.cpp 
// compile with: /EHsc 
#include <unordered_set> 
#include <iostream> 
 
typedef std::unordered_set<char> Myset; 
int main() 
    { 
    Myset c1; 
 
    c1.insert('a'); 
    c1.insert('b'); 
    c1.insert('c'); 
 
// display contents " [c] [b] [a]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
// display buckets for keys 
    Myset::size_type bs = c1.bucket('a'); 
    std::cout << "bucket('a') == " << bs << std::endl; 
    std::cout << "bucket_size(" << bs << ") == " << c1.bucket_size(bs) 
        << std::endl; 
 
    return (0); 
    }