vector assign

                                    // inserting into a vector
#include <iostream>
#include <vector>

int main ()
{
  std::vector<int> myvector (3,100);
  std::vector<int>::iterator it;

  it = myvector.begin();
  it = myvector.insert ( it , 200 );

  myvector.insert (it,2,300);

  // "it" no longer valid, get a new one:
  it = myvector.begin();

  std::vector<int> anothervector (2,400);
  myvector.insert (it+2,anothervector.begin(),anothervector.end());

  int myarray [] = { 501,502,503 };
  myvector.insert (myvector.begin(), myarray, myarray+3);

  std::cout << "myvector contains:";
  for (it=myvector.begin(); it<myvector.end(); it++)
    std::cout << ' ' << *it;
  std::cout << '\n';

  return 0;
}

                                    #include <iostream>
#include <vector>

using namespace std;

int main()
{
    int arr[] = {1, 2, 3, 4, 7};
    vector<int> v1;
    vector<int> v2;
    v1.assign(arr, arr+5);
    v2.assign(arr, arr+2);

    //printing values of v1
    cout << "elements of v1" << endl;
    for(int i = 0; i < v1.size(); i++)
    {
        cout << v1[i] << endl;
    }

    //printing values of v2
    cout << "elements of v2" << endl;
    for(int i = 0; i < v2.size(); i++)
    {
        cout << v2[i] << endl;
    }
    return 0;
}