CODE EXAMPLE FOR CPP

C++ vector at() method

// vector::at 
//from: https://www.cplusplus.com/reference/vector/vector/at/#:~:text=std%3A%3Avector%3A%3Aat&text=Returns%20a%20reference%20to%20the,equal%20to%2C%20its%20size).
#include <iostream>
#include <vector>

int main ()
{
  std::vector<int> myvector (10);   // 10 zero-initialized ints

  // assign some values:
  for (unsigned i=0; i<myvector.size(); i++)
    myvector.at(i)=i;

  std::cout << "myvector contains:";
  for (unsigned i=0; i<myvector.size(); i++)
    std::cout << ' ' << myvector.at(i);
  std::cout << '
';

  return 0;
}