What is the problem with this code?

See more:

C++11

The problem terminates before taking any input. What could be the possible reasons for that? I am very new to competitive programming. Currently, I am learning Vector in STl.

What I have tried:

#include<bits/stdc++.h>
using namespace std;

void printvec(vector<int> v)
{
    cout<<v.size()<<endl;
    for(int j=0;j<v.size();++j)
    {
        cout<<v[j]<<" ";
    }
    cout<<endl;
}
int main()
{
   
    int i;
    vector<int> v;
    cout<<"Enter Array"<<endl;
    for(i=0;i<4;++i)
    {
        int k;
        cin>>k;
        v.push_back(k);
        printvec(v);
    } 
    printvec(v);
    return 0;

}