<boost/foreach.hpp>   提供两个宏：BOOST_FOREACH 和 BOOST_REVERSE_FOREACH

#include 
     
      #include 
      
       #include 
       
        #include 
        
         int main(){    std::vector
         
           vect = boost::assign::list_of(1)(2)(3);    BOOST_FOREACH(int x,vect)   //BOOST_FOREACH 与 BOOST_REVERSE_FOREACH 都是宏    {        std::cout<
          
           <<","; } std::string str = "Hello"; std::cout<<"\n"; BOOST_REVERSE_FOREACH(char& c,str) { std::cout<
           
            <<","; } std::cout<<"\n"; BOOST_FOREACH(BOOST_TYPEOF(*str.begin()) c,str) //配合 BOOST_TYPEOF 来使用匿名类型 { std::cout<
            
             <<","; }}