c - 如何在while循环中扫描多个输入？

Question

while((player1chip==-1)||(player2chip==-1)||(player3chip==-1)){                                                              
    player1chip=-1; player2chip=-1; player3chip=-1;                                                       
    printf("How many chips would you like to play with (3-10):\n");
    scanf("%d%d%d", &player1chip, &player2chip, &player3chip);
    getchar();
}

我想一次获得 3 个值，但循环似乎已经运行了 3 次......我应该怎么做？

Answer 1

scanf() 语句对于您要执行的操作有点奇怪，因为您说您期望使用“%d%d%d”来没有分隔的三个数字。如果 while 循环的目的是填充 playerchip 变量，则应为它们使用一个数组并遍历该数组，如下所示：

playerchip[3];   
for(int i=0; i<3; i++) {
    printf("How many chips would player %d like to play with (3-10)?:\n", i);
    scanf("%d", &playerchip[i]);
}

如果保留命名方案，则不能使用循环轻松填充变量。不过，要回答您最初的问题，要一次获取多个数字，您需要在 scanf() 语句中添加一些分隔符：

scanf("%d %d %d", &a, &b, &c);

这样，每个人都知道一个数字何时结束，另一个数字何时开始。

Answer 2

int p1chip=-1, p2chip=-1, p3chip=-1;
do {
  printf("How many chips would you like to play with (3-10)?\n");
  scanf("%d%d%d", &p1chip, &p2chip, &p3chip);
} while ((p1chip == -1) || (p2chip == -1) || (p3chip == -1))

试试看。