
/* rand_ext.c: guess the number */
#include       /* printf, scanf, puts, NULL */
#include      /* srand, rand */
#include        /* time */

int main(void)
{
    int secret, guess;

    /* initialize random seed */
    srand(time(NULL));

    /* generate secret number between 1 and 10 */
    secret = rand() % 10 + 1;

    do {
        printf ("Guess the number (1 to 10): ");
        scanf ("%d",&guess);
        if (secret < guess) puts ("The secret number is lower");
        else if (secret > guess) puts ("The secret number is higher");
    } while (secret != guess);

    puts ("Congratulations!");

    return 0;
}