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附件是我的骰子游戏的代码。我得到玩家100%的胜利，因为我的兰德（）在所有1，000，000场比赛中调用相同的数字。我已经看到很多人发布关于这个问题的帖子，每个人都说只给srand打一次电话，但我想我不明白这意味着什么。这是我在C的第六周，它开始变得非常混乱。

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define numGames (1000000)
#define plrWinThrw (7, 11)
#define hseWinThrw (2, 3, 12)

int rollDice ();
int playGame ();

int main ()
{
  srand (time (NULL));
  int playerWins = 0;
  int houseWins = 0;

  for (int i = 0; i < numGames; i++)
    {
      int result = playGame ();
      if (result == 1)
        {
          playerWins++;
        }
      else
        {
          houseWins++;
        }
    }

  float playerProb = (float) playerWins / numGames * 100;
  float houseProb = (float) houseWins / numGames * 100;

  printf ("Number of games won by the player: %d\n", playerWins);
  printf ("Number of games won by the house: %d\n", houseWins);
  printf ("Percent probability the player wins: %.1lf\n", playerProb);
  printf ("Percent probability the house wins: %.1lf\n", houseProb);

  return 0;
}

int rollDice ()
{
  int die1 = rand () % 6 + 1;
  int die2 = rand () % 6 + 1;
  int roll = die1 + die2;
  return roll;
}

int playGame ()
{
  int roll = rollDice ();

  if (roll = plrWinThrw)
    {
      return 1;
    }
  else if (roll = hseWinThrw)
    {
      return -1;
    }
  int point = roll;
  while (roll != point && roll != 7)
    {
      roll = rollDice ();
    }
  if (roll = point)
    {
      return 1;
    }
  return -1;
}

我试过移动srand和rand（）函数。似乎没有什么能解决我的问题。