While we're here, how about getting some practice with vector? Modify the program you just wrote to add the lines you read into a vector of string. Then, enumerate the vector backwards, printing out each string. More than that, print each line backwards.
To reverse a string, you'll need <algorithm> and a function called, wait for it, reverse(). reverse() takes enumerators as arguments. Every string has some built-in enumerators, .begin() and .end(). These are precisely the enumerators you need.
There's a bit of a trick here to avoid warnings and not cause errors in the loop enumerating the vector backwards. vector .size() returns a size_t which is an uint64_t - unsigned. So, if you made a for loop that stopped at counter >= 0 you're in for trouble because an unsigned integer is always greater than or equal to zero.
There are several ways to avoid this. The solution code shows just one of these ways.