cs50 tideman lock_paiors函数问题

问题描述

您好，我在pset3 tideman上的我的密码对functinog遇到问题了

hi guys im having problome with my lockpairs functinog on pset3 tideman would love some feedback ty

bool checkcycle(int from, int to)
{
   if(from == to)
   {
       return true;
   }
   int i;
   for (i = 0; i < candidate_count; i++)
   {
       if(locked[from][i])
       {
           checkcycle(i,to);
       }
   }
   return false;
}


void lock_pairs(void)
{
   for (int i = 0; i < candidate_count; i++)
   {
      if(!checkcycle(pairs[i].winner , pairs[i].loser))
      {
          locked[pairs[i].winner][pairs[i].loser] = true;
      }
    return;
   }
}

:( lock_pairs在没有循环时锁定所有对lock_pairs没有锁定所有对:(如果创建周期，lock_pairs会跳过最后一对lock_pairs没有正确锁定所有非周期性对:(如果创建一个循环，lock_pairs会跳过中间对lock_pairs没有正确锁定所有非周期性对

:( lock_pairs locks all pairs when no cycleslock_pairs did not lock all pairs:( lock_pairs skips final pair if it creates cyclelock_pairs did not correctly lock all non-cyclical pairs:( lock_pairs skips middle pair if it creates a cyclelock_pairs did not correctly lock all non-cyclical pairs

推荐答案

您的checkcycle函数仅需进行一些调整.我会将从更改为 winner ，将更改为 loser .我认为这会更容易理解.给定一对，您将呼叫 checkcycle(获胜者，失败者).检查 winner ==失败者后，您应该遍历所有对，检查 loser 是否是 winner ，然后调用 checkcycle(winner，失败者)，传递相同的原始获胜者，以及失败者的失败者

Your checkcycle function just need a little adjustment. I would change from to winner and to to loser. I think it would be easier to understand. Given a pair, you will call checkcycle(winner, loser). After checking if winner == loser, you should iterate over all pairs checking if loser is the winner, and calling checkcycle(winner, loser), passing the same original winner, and the loser of the loser

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