pop an element from vector c++ code example

Example 1: c++ vector pop first element

std::vector<int> vect;

vect.erase(vect.begin());

Example 2: vector pop back

// vector::pop_back
#include <iostream>
#include <vector>

int main ()
{
  std::vector<int> myvector;
  int sum (0);
  myvector.push_back (100);
  myvector.push_back (200);
  myvector.push_back (300);

  while (!myvector.empty())
  {
    sum+=myvector.back();
    myvector.pop_back();
  }

  std::cout << "The elements of myvector add up to " << sum << '\n';

  return 0;
}

Example 3: vector erase specific element

vector.erase( vector.begin() + 3 ); // Deleting the fourth element

Example 4: c++ remove element from vector

vector.erase(position) // remove certain position
// or
vector.erase(left,right) // remove positions within range