main.cpp

#include <fstream>
#include <deque>
#include <string>

int main() {
	std::ifstream input;
	input.open("C:/Users/Ollie/Desktop/Captures/Q.txt", std::ifstream::in);
	
	std::string line;
	std::deque<std::string> linesReversed;
	while (input.good() && std::getline(input, line)) {
		linesReversed.push_front(line);
	}

	// linesReversed now has lines from your file in reverse order :)
	
	input.close();
}