C++ stl vector basic
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector<int> v;
vector<int> a(5,1);
vector<int> last(a);
cout<<"Print last"<<endl;
for(int i:last){
cout<<i<<" ";
}cout<<endl;
cout<<"capacity "<<v.capacity()<<endl;
v.push_back(1);
cout<<"capacity "<<v.capacity()<<endl;
v.push_back(2);
cout<<"capacity "<<v.capacity()<<endl;
v.push_back(3);
cout<<"capacity "<<v.capacity()<<endl;
cout<<"size "<<v.size()<<endl;
cout<<"Element at second index "<<v.at(2)<<endl;
cout<<"front "<<v.front()<<endl;
cout<<"back "<<v.back()<<endl;
}