Boost练习程序（multi_index_container）-白红宇

Boost练习程序（multi_index_container）

阅读量：6905 次

发布时间：2019-06-27

本文共 1219 字，大约阅读时间需要 4 分钟。

代码来自：http://blog.csdn.net/whuqin/article/details/8482547

该容器能实现多列索引，挺好。

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace boost;using namespace boost::multi_index;using namespace std;struct Employee{    int id;    string name;    int age;    Employee(int id_,string name_,int age_):id(id_),name(name_),age(age_){}    friend ostream& operator<<(ostream& os,const Employee& e)    {        os<
          
           <<" "<
           
            <<" "<
            
             <
             
               >,ordered_non_unique
              
               
                 >,ordered_non_unique
                
                 
                   >>> EmployeeContainer;typedef EmployeeContainer::nth_index<0>::type IdIndex;typedef EmployeeContainer::nth_index<1>::type NameIndex;typedef EmployeeContainer::nth_index<2>::type AgeIndex;int main(){ EmployeeContainer con; con.insert(Employee(0,"Joe",31)); con.insert(Employee(1,"Robert",27)); con.insert(Employee(2,"John",40)); IdIndex& ids = con.get<0>(); copy(ids.begin(),ids.end(), ostream_iterator
                  
                   (cout)); cout << endl; NameIndex& names = con.get<1>(); copy(names.begin(), names.end(), ostream_iterator
                   
                    (cout)); cout << endl; // names.erase(names.begin()); AgeIndex& ages = con.get<2>(); copy(ages.begin(), ages.end(), ostream_iterator
                    
                     (cout)); cout << endl; return 0;}