C++ 向量 中的 swap()函数

v1.swap(v2);

#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<int>  v1={1,2,3,4,5};
vector<int>  v2={6,7,8,9,10};
cout<<"Before swapping,elements of v1 are :";
for (int i=0;i<v1.size();i++)
cout<<v1[i]<<" ";
cout<<'\n';
cout<<"Before swapping,elements of v2 are :";
for(int i=0;i<v2.size();i++)
cout<<v2[i]<<" ";
cout<<'\n';
v1.swap(v2);
cout<<"After swapping,elements of v1 are  :";
for(int i=0;i<v1.size();i++)
cout<<v1[i]<<" ";
cout<<'\n';
cout<<"After swapping,elements of v2 are:";
for(int i=0;i<v2.size();i++)
cout<<v2[i]<<" ";
return 0;
}