我的C数组在执行期间被破坏

Question

我正在为一款纸牌游戏编写一个C程序，而且我正在制定算法来为每个玩家发牌。问题是，似乎没有理由，我的数组指针在执行过程中被设置为0，我无法弄清楚原因。它似乎发生在我的代码中的一个非常特定的地方。这里就是我声明数组：

struct Hand *hands = (struct Hand*)calloc(players, sizeof(struct Hand)); 
for (int player = 0; player < leftovers; player++) { 
    //Allocate an extra spot for these players, since they take an 
    //extra card 
    hands[player].cardv = (struct Card*)calloc((cardsperplayer + 1), sizeof(struct Card)); 
    hands[player].cardc = cardsperplayer + 1; 
} 
for (int player = leftovers; player < players; player++) { 
    //Allocate the normal amount of cards for the rest of the players 
    hands[player].cardv = (struct Card*)calloc((cardsperplayer), sizeof(struct Card)); 
    hands[player].cardc = cardsperplayer; 
} 

接下来，我们跳过，我做出一副扑克牌，并与卡值填充它，到了那里，我洗牌在甲板上的点的部分，准备好处理它们。似乎只要洗牌结束，指向手阵列的指针就会变差。

//Then we add the jokers on the end 
struct Card blackJoker = {0, 13}; 
deck[52] = blackJoker; 
struct Card redJoker = {1, 13}; 
deck[53] = redJoker; 
//Now, we shuffle the deck using the Fisher Yates shuffle (the Durstenfeld version) 
for (int cardsleft = 54; cardsleft > 0; cardsleft--) { 
    swapCards(deck, cardsleft, rand() % cardsleft); 
} 
//IT SEEMS TO DROP THE HANDS ARRAY RIGHT HERE...run 
//Now that the cards are randomly shuffled, we just deal them out to 
// everyone (it doesn't matter about the order, this is supposed to 
//be truly random! 
currentCard = 0; 
for (int player = 0; player < leftovers; player++) { 
    //Deal an extra card for these players, since they take an extra 
    //card 
    for (int card = 0; card < hands[player].cardc; card++) { 
     hands[player].cardv[card] = deck[currentCard]; 
     currentCard++; 
    } 
} 

我没有得到的东西是，直接在之前或之后的手阵列访问。但仍然，手阵列结束了死亡，我得到一个Segfault试图访问一个疯狂的地址。我将包含代码的其他部分，以供参考。

void swapCards(struct Card *set, int a, int b) { 
struct Card temp = set[a]; 
set[a] = set[b]; 
set[b] = temp; 

这是我做存储卡和手的结构：

struct Card { 
int suit; 
int value; 
}; 

struct Hand { 
    int cardc; 
    struct Card* cardv; 
}; 

如果你想运行完整的应用程序，它是托管在Github上一个C程序，在https://github.com/Mikumiku747/kingandserf 它不应该需要除C编译器和make外的任何先决条件。至于一些决定性的证据，我把它通过调试，这是我发现那里一切都错了一点：

Reading symbols from /home/pi/kingandtheserf/bin/kats...done. 
(gdb) b cardops.c:90 
Breakpoint 1 at 0x8a58: file src/cardops.c, line 90. 
(gdb) b cardops.c:94 
Breakpoint 2 at 0x8aa8: file src/cardops.c, line 94. 
(gdb) b cardops.c:98 
Note: breakpoint 2 also set at pc 0x8aa8. 
Breakpoint 3 at 0x8aa8: file src/cardops.c, line 98. 
(gdb) run a a a 
Starting program: /home/pi/kingandtheserf/bin/kats a a a 

Breakpoint 1, dealHands (players=4, sort=0) at src/cardops.c:91 
91  for (int cardsleft = 54; cardsleft > 0; cardsleft--) { 
(gdb) p hands 
$1 = (struct Hand *) 0x13008 
(gdb) p hands[0] 
$2 = {cardc = 14, cardv = 0x13030} 
(gdb) p hands[2] 
$3 = {cardc = 13, cardv = 0x13120} 
(gdb) c 
Continuing. 

Breakpoint 2, dealHands (players=4, sort=0) at src/cardops.c:98 
98  currentCard = 0; 
(gdb) p hands 
$4 = (struct Hand *) 0x2 
(gdb) p hands[0] 
Cannot access memory at address 0x2 
(gdb) c 
Continuing. 

Program received signal SIGSEGV, Segmentation fault. 
0x00008b30 in dealHands (players=4, sort=0) at src/cardops.c:102 
102   for (int card = 0; card < hands[player].cardc; card++) { 
(gdb) quit 

即使有人不知道如何解决这个问题，可能他们至少告诉我发生了什么事。我以前从未见过这种情况，现在我唯一的猜测是优化器以某种方式破坏了它。

Answer 1

在循环中的第一次调用swapCards交换和另一个指标54卡，但指数最高到deck阵列为53