How do I take imported user strings from an array and print a random one out in C?

Question

// Helps a user decide which homework to do first
#include <cs50.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(void)
{
    // Prompt the user for the number of courses that they have homework in
    int n = get_int("How many courses do you have homework in? ");

    // TODO: Declare an array of courses with the correct number of elements

    // TODO: Prompt the user for their course names and store it in the array
    int courses[n];
    for (int i = 0; i < n; i++)
    {
        courses[i] = get_int("Course: ");
    }
    // Initialize random number generator
    // (found info on https://www.tutorialspoint.com/c_standard_library/c_function_rand.htm)
    time_t t;
    srand((unsigned) time(&t));

    // Find a random number
    int r = rand() % n;

    // TODO: Print out a random course number with index r
}

Can someone help with the todos?