How to make random output from c++ file?

Question

C++ / C#

In general, there is such a task, I write the n-th number of words to a file, by a word in a line
Example:
Man
Beetle
Guinea

I need it to display a random word from the list when starting the program. Help me please.
I tried the method getline(), and did not understand how this function saves. With the help of a vector, I didn’t think of it either. I made a conclusion, it's elementary, but I didn't figure out how to organize it randomly.

Answer 1

#include <iostream>
#include <string>
#include <fstream>
#include <time.h>

using namespace std;

int main() {
    srand((unsigned int)time(0));

    int n = 10; // количество строк в файле

    int random = rand() % n + 1;

    ifstream in("test.txt");
    string result;

    for (int i = 0; i < random; i++) {
        getline(in, result);
    }

    cout << result << endl;

    system("pause");
    return 0;
}