vector常见用法

 #include <boost/foreach.hpp>
 #include <iostream>
 #include <vector>
 #include <boost/foreach.hpp>
 using namespace std;
 using namespace boost;
 class Test
 {
 public:
     Test(int a){
         age=a;
     }
     int age;
     bool   operator < ( const   Test&   rhs )  const {   //升序排序时必须写的函数
         return   age   <   rhs.age;
     }
     bool   operator > ( const   Test&   rhs )  const {   //降序排序时必须写的函数
         return   age   >   rhs.age;
     }
 };
 int main(void)
 {
     vector<Test> data;
     Test t1();
     Test t2();
     Test t3();
     Test t4();
     data.push_back(t1);
     data.push_back(t2);
     data.push_back(t3);
     data.push_back(t4);
     //1. 遍历
     for (vector<Test>::iterator it=data.begin(); it!=data.end(); it++) {
         cout<<it->age<< std::endl;
     }
     //2. 排序
     std::sort ( data.begin(), data.end(),greater<Test>() ); //lesss 升序
     //3. boost遍历
     BOOST_FOREACH(const Test& t,data)
     {
         cout<<t.age<< std::endl;
     }
     //4. 删除多个元素
     for ( vector<Test>::iterator it = data.begin(); it != data.end(); ) {
         if ( it->age ==    || it->age ==  ) {
             it = data.erase ( it );
         } else {
             it++;
         }
     }
     std::sort ( data.begin(), data.end(),less<Test>() ); //lesss 升序
     BOOST_FOREACH(const Test& t,data)
     {
         cout<<t.age<< std::endl;
     }
     return ;
 }