Рандомизация игры "Сапёр"

srand(time(NULL));

#include <cstdlib>
#include <ctime>
//в начале main или где-то там:
srand ( time ( 0 ) ) ; //Можете явно типы привести

srand(time(NULL));

/*-
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 * Copyright (c) 1990, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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//__FBSDID("$FreeBSD: src/lib/libc/stdlib/rand.c,v 1.17.2.1.2.1 2009/10/25 01:10:29 kensmith Exp $");
#include  <LibConfig.h>
 
#include  <stdlib.h>
 
static UINT32 next = 1;
 
/** Compute a pseudo-random number.
  *
  * Compute x = (7^5 * x) mod (2^31 - 1)
  * without overflowing 31 bits:
  *      (2^31 - 1) = 127773 * (7^5) + 2836
  * From "Random number generators: good ones are hard to find",
  * Park and Miller, Communications of the ACM, vol. 31, no. 10,
  * October 1988, p. 1195.
**/
int
rand()
{
  INT32 hi, lo, x;
 
  /* Can't be initialized with 0, so use another value. */
  if (next == 0)
    next = 123459876;
  hi = next / 127773;
  lo = next % 127773;
  x = 16807 * lo - 2836 * hi;
  if (x < 0)
    x += 0x7fffffff;
  return ((next = x) % ((UINT32)RAND_MAX + 1));
}
 
void
srand(unsigned int seed)
{
  next = (UINT32)seed;
}