How to use srand and rand to continuously generate new numbers?

In my main funtion, the function fragment below is looped to keep generating two numbers between 0 and 4. The first time it goes through the loop it works fine, but the second time it gets core dumped. I'm not sure if it's because of a bug somewhere else or if I just didn't use the rand and srand properly. Very new to c language here.

void generate_player2_move(char board[][SIZE], int row, int col) {
    //segmentation fault (core dumped) somewhere around here.
    int randrow, randcol;
    srand((unsigned) randrow);
    srand((unsigned) randcol);  

    row = rand() % 4;
    col = rand() % 4;
}