vector的定义与操作

#include<iostream>
#include<vector>
#include<iterator>
#include<algorithm>
using namespace std;

void display(vector<int> &v2);
int main()
{



    /**vector<int> v1(10),v2;
    int i;
     cout<<v1.capacity()<<endl;
    v1.push_back(123);
    cout<<v1.capacity()<<endl;
    v1.push_back(234);
    cout<<v1.capacity()<<endl;
    v1.reserve(20);
    cout<<v1.capacity()<<endl;
    for(i=0;i<v1.size();i++)
     cout<<v1.at(i)<<" ";
    cout<<endl;**/
    /*排序*/
    /**int a;
    vector<int> v;
    for(int i=0;i<5;i++){
      cin>>a;
      v.push_back(a);
    }
    cout<<"sort before:";
    display(v);
    sort(v.begin(),v.end());
    cout<<"sort after:";
    display(v);**/
    /*int i;
    vector<int> v,v2(10);
    cout<<"the v length is :"<<v.size()<<endl;
    v.push_back(1);//在之后添加元素
    for(i=1;i<=10;i++){
    v2[i]=i;
    }
     cout<<"v:"<<endl;
    display(v);
    cout<<endl;
    cout<<"v2:"<<endl;
    display(v2);*/


    return 0;
}

void display(vector<int> &v2){
  vector<int>::iterator ite;
  for(ite=v2.begin();ite!=v2.end();ite++){
    cout<<*ite<<" ";
  }
}