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(1);
    Test t2(2);
    Test t3(3);
    Test t4(4);
    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 == 1   || it->age == 3 ) {
            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 0;
}