std::vector<int> myContainer = {42, 43, 44, 45};

// Bad
for(std::vector<int>::iterator it = myContainer.begin(); it != myContainer.end(); ++it)
{
    //...
}

// Not as bad
for(int index = 0; index < myContainer.size(); ++index )
{
    //...
}

// Good
for(int value: myContainer)
{
    //...
}