c++ vector clear()清除容器中所有数据

#include <string.h>
#include <vector>
#include <iostream>
using namespace std;

int main()
{
    vector<int>obj;
    for(int i=0;i<10;i++)//push_back(elem)在数组最后添加数据 
    {
        obj.push_back(i);
        cout<<obj[i]<<",";
    }

    cout<<"\n"<<"清理之前　obj.size()="<<obj.size()<<"\n"<<endl;
    obj.clear();//清除容器中所以数据
    cout<<"清理之后obj.size()="<<obj.size()<<"\n"<<endl;

    for(int i=0;i<obj.size();i++)
    {
        cout<<obj[i]<<endl;
    }

    return 0;
}

0,1,2,3,4,5,6,7,8,9,
清理之前　obj.size()=10

清理之后obj.size()=0