字符矩阵溢出

Question

代码很简单，我正在尝试做一个战舰游戏，但还处于早期阶段

#include <stdio.h>

void main()
{
int i = 0;                                   /* Loop counter  */
int player = 0;                              /* Player number - 1 or 2  */
int go = 0;                                  /* Square selection number for turn */
int row = 0;                                 /* Row index for a square  */
int column = 0;                              /* Column index for a square  */
int line = 0;                                /* Row or column index in checking loop */
int winner = 0;                              /* The winning player  */
char board[8][8] = {                         /* The board                            */
                   {'1','2','3','4','5','6','7','8'},               /* Initial values are reference numbers */
                   {'9','10','11','12','13','14','15','16'},        /* used to select a vacant square for   */
                   {'17','18','19','20','21','22','23','24'},        /* a turn.                              */
                   {'25','26','27','28','29','30','31','32'},
                   {'33','34','35','36','37','38','39','40'},
                   {'41','42','43','44','45','46','47','48'},
                   {'49','50','51','52','53','54','55','56'},
                   {'57','58','59','60','61','62','63','64'}
                 };

/* The main game loop. The game continues for up to 64 turns */
/* As long as there is no winner                            */
for( i = 0; i<64 && winner==0; i++)
{
  /* Display the board */
printf("\n\n");
  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[0][0], board[0][1], board[0][2], board[0][3], board[0][4], board[0][5], board[0][6], board[0][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[1][0], board[1][1], board[1][2], board[1][3], board[1][4], board[1][5], board[1][6], board[1][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[2][0], board[2][1], board[2][2], board[2][3], board[2][4], board[2][5], board[2][6], board[2][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[3][0], board[3][1], board[3][2], board[3][3], board[3][4], board[3][5], board[3][6], board[3][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[4][0], board[4][1], board[4][2], board[4][3], board[4][4], board[4][5], board[4][6], board[4][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[5][0], board[5][1], board[5][2], board[5][3], board[5][4], board[5][5], board[5][6], board[5][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[6][0], board[6][1], board[6][2], board[6][3], board[6][4], board[6][5], board[6][6], board[6][7]);

  printf(" %2c | %2c | %2c | %2c | %2c | %2c | %2c | %2c\n", board[7][0], board[7][1], board[7][2], board[7][3], board[7][4], board[7][5], board[7][6], board[7][7]);

我正在尝试获得类似于

的输出

1  |  2  |  3  |  4  |  5  |  6  |  7  |  8
9  |  10 |  11 |  12 |  13 |  14 |  15 |  16
17 |  18 |  19 |  20 |  21 |  22 |  23 |  24

一直到 64，但我得到的是

1  |  2  |  3  |  4  |  5  |  6  |  7  |  8
9  |  0  |  1  |  2  |  3  |  4  |  5  |  6
7  |  8  |  9  |  0  |  1  |  2  |  3  |  4

等等... 只显示数字右边的数字

至于我得到的错误消息是关于 char board[8][8] 之后的内容它适用于所有 8 行

Multiple markers at this line

-overflow in implicit constant conversion [-Woverflow]

-multi-character character constant [-Wmultichar]

我是 c/anci-c 的新手，所以任何信息都会有所帮助

Answer 1

这些不是有效字符 {'17','18','19','20','21','22','23','24'},，因为它们由 2 个字符组成。如果你想存储超过 1 个字符的文本，你需要一个字符串，或者如果你想要数字，你应该删除单引号。无论哪种方式，您的 printf 语句也需要更改，因为您想要 %2s 或 %2d

Answer 2

您选择了 board 类型 char，这意味着它包含的所有内容都应恰好为 1 个字符长。但是，您分配“10”、“11”等，它们包含 2 个字符。因此，编译器尝试将 2 个字符转换为 1 个字符的 char。但是由于 2 > 1，它会溢出，这会导致只分配一个字符（显然是最后一个字符）。此外，由于它基本上是对系统的一部分的猜测，它还会为您提供第二条错误消息。

您想将 board 类型从 char 更改为 string 或 int（当然要删除数字周围的单引号）。您还希望 printf() 功能更改为正确的格式。

字符矩阵溢出

Char matrix overflow

c

printf

overflow