C - 需要帮助调试国际象棋功能

Question

<分区>

Answer 1

我认为问题可能在于您输入例程的坐标或者您的 isValidCoords 例程的问题。为了测试您发布的代码，我提供了这个驱动程序:

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

typedef struct {
    char board[8][8];
} game_t;

int isValidCoords(int x, int y)
{
    return (x >= 0) && (y >= 0) && (x < 8) && (y < 8);
}

enum pieces { EMPTY, 
              BLACK_N, BLACK_B, BLACK_R, BLACK_Q, BLACK_K, BLACK_P, 
              WHITE_N, WHITE_B, WHITE_R, WHITE_Q, WHITE_K, WHITE_P };

const char pieceabbrev[] = " NBRQKPnbrqkp";

#define BLACK 0
#define WHITE 1

int ABS(int i)
{
    return i < 0 ? -i : i;
}
void showboard(game_t *game)
{
    const char hline[] ="\n |-------------------------------|";

    puts(hline);
    for (int y=7; y>=0; --y) {
        printf("%d|", y);
        for (int x=0; x < 8; ++x) {
            printf(" %c |", pieceabbrev[game->board[x][y]]);
        }   
        puts(hline);
    }   
    printf("  ");
    for (int x=0; x < 8; ++x) {
        printf(" %d  ", x);
    }
    printf("\n");
}

/*
Y
 |-------------------------------|
7| R | N | B |   |   | B | N | R |
 |-------------------------------|
6| P | P | P |   | P | K | P | P |
 |-------------------------------|
5|   |   |   | Q |   |   |   |   |
 |-------------------------------|
4|   |   |   |   |   |   |   |   |
 |-------------------------------|
3|   |   | b |   | P |   |   |   |
 |-------------------------------|
2|   |   |   |   |   |   |   |   |
 |-------------------------------|
1| p | p | p | p |   | p | p | p |
 |-------------------------------|
0| r | n | b |   | k |   | n | r |
 |-------------------------------|
   0   1   2   3   4   5   6   7     X
 lowercase is white
 Uppercase is Black
*/
int main()
{
    game_t game;
    for (int i=0; i < 8; ++i)
        for (int j=0; j < 8; ++j)
            game.board[i][j] = EMPTY;

    game.board[0][7] = BLACK_R;
    game.board[1][7] = BLACK_N;
    game.board[2][7] = BLACK_B;
    game.board[3][7] = EMPTY;
    game.board[4][7] = EMPTY;
    game.board[5][7] = BLACK_B;
    game.board[6][7] = BLACK_N;
    game.board[7][7] = BLACK_R;

    game.board[0][6] = BLACK_P;
    game.board[1][6] = BLACK_P;
    game.board[2][6] = BLACK_P;
    game.board[3][6] = EMPTY;
    game.board[4][6] = BLACK_P;
    game.board[5][6] = BLACK_K;
    game.board[6][6] = BLACK_P;
    game.board[7][6] = BLACK_P;

    game.board[3][5] = BLACK_Q;

    game.board[2][3] = WHITE_B;
    game.board[4][3] = WHITE_P;

    game.board[0][1] = WHITE_P;
    game.board[1][1] = WHITE_P;
    game.board[2][1] = WHITE_P;
    game.board[3][1] = WHITE_P;
    game.board[4][1] = EMPTY;
    game.board[5][1] = WHITE_P;
    game.board[6][1] = WHITE_P;
    game.board[7][1] = WHITE_P;

    game.board[0][0] = WHITE_R;
    game.board[1][0] = WHITE_N;
    game.board[2][0] = WHITE_B;
    game.board[3][0] = EMPTY;
    game.board[4][0] = WHITE_K;
    game.board[5][0] = EMPTY;
    game.board[6][0] = WHITE_N;
    game.board[7][0] = WHITE_R;

    printf("attacked = %d\n", isAttacked(&game, 5, 6, BLACK));

    showboard(&game);
}

然后我检测了您的代码。它原来有一个 return 1; 我把它改成这样:

{
    printf("%c is attacking from (%d,%d)\n", 
           pieceabbrev[game->board[curX][curY]], curX, curY);
    return 1;
}

程序输出:

b is attacking from (2,3)
attacked = 1

 |-------------------------------|
7| R | N | B |   |   | B | N | R |
 |-------------------------------|
6| P | P | P |   | P | K | P | P |
 |-------------------------------|
5|   |   |   | Q |   |   |   |   |
 |-------------------------------|
4|   |   |   |   |   |   |   |   |
 |-------------------------------|
3|   |   | b |   | p |   |   |   |
 |-------------------------------|
2|   |   |   |   |   |   |   |   |
 |-------------------------------|
1| p | p | p | p |   | p | p | p |
 |-------------------------------|
0| r | n | b |   | k |   | n | r |
 |-------------------------------|
   0   1   2   3   4   5   6   7  

如您所见，您的例程正确检测到攻击主教，所以我怀疑问题出在其他地方。

此外，尽管如此，提供一个最小但完整的示例(就像我提供的代码一样)可能会让其他人更容易帮助您。