unordered_set::key_type

项目
06/09/2015

排序键的类型。

typedef Key key_type;

备注

类型是的同义词。Key模板参数

示例

// std_tr1__unordered_set__unordered_set_key_type.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; 
 
// add a value and reinspect 
    Myset::key_type key = 'd'; 
    Myset::value_type val = key; 
    c1.insert(val); 
 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
    return (0); 
    }