c++ vector pop_back() 与pop_back()

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

int main()
{
    vector<int>obj;//创建一个向量存储容器 int
    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]<<",";
    }

    for(int i=0;i<5;i++)//去掉数组最后一个数据 
    {
        obj.pop_back();
    }

    cout<<"\n"<<endl;

    for(int i=0;i<obj.size();i++)//size()容器中实际数据个数 
    {
        cout<<obj[i]<<",";
    }
    cout<<"\n"<<endl;
    return 0;
}

0,1,2,3,4,5,6,7,8,9,

0,1,2,3,4,