making random numbers in c 2b 2b

1/* rand example: guess the number */
2#include <stdio.h>      /* printf, scanf, puts, NULL */
3#include <stdlib.h>     /* srand, rand */
4#include <time.h>       /* time */
5
6int main ()
7{
8  int iSecret, iGuess;
9
10  /* initialize random seed: */
11  srand (time(NULL));
12
13  /* generate secret number between 1 and 10: */
14  iSecret = rand() % 10 + 1;
15
16  do {
17    printf ("Guess the number (1 to 10): ");
18    scanf ("%d",&iGuess);
19    if (iSecret<iGuess) puts ("The secret number is lower");
20    else if (iSecret>iGuess) puts ("The secret number is higher");
21  } while (iSecret!=iGuess);
22
23  puts ("Congratulations!");
24  return 0;
25}