Random Pairs Generator

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <fstream>

int main()
{

    //Define variables:
    std::vector<std::string> classList;
    std::vector<std::string> newList;
    std::string file = "";
    std::ifstream myFile(file);
    std::string line = "";
    int count = 0;

    //Main loop:
    while (file != "exit") {
        std::cout << "Enter file directory (type 'exit' to end process): ";
        std::cin >> file;

        //Add names from file to classList:
        if (myFile.is_open()) {
            while (std::getline(myFile, line)) {
                classList.push_back(line);
                count++;
            }
        }

        //Ensure the list has an even number of names:
        if (count % 2 == 0 && file != "exit") {
            std::srand(unsigned(std::time(0)));

            //Randomize the classList:
            std::random_shuffle(classList.begin(), classList.end());

            //Pair the names that are next to each other and add it to the newList:
            for (int i = 0; i < classList.size() - 1; i++) {
                std::string str1 = classList[i] + "\n" + classList[i + 1];
                i++;
                newList.push_back(str1);
            }

            //Print out pairs:
            std::cout << "\nRandomly generated pairs:\n\n";
            for (int i = 0; i < newList.size(); i++) {
                std::cout << newList[i] << "\n\n";
            }

            //Clear vectors:
            classList.clear();
            newList.clear();
        }
        else {
            std::cout << "\nPlease enter a list with an even number of names.\n\n";
        }
    }
}