int numRookCaptures(char** board, int boardSize, int* boardColSize){ int cnt = 0, st = 0, ed = 0; int dx[4] = {0, 1, 0, -1}; int dy[4] = {1, 0, -1, 0}; for (int i = 0; i < 8; ++i) { for (int j = 0; j < 8; ++j) { if (board[i][j] == 'R') { st = i; ed = j; break; } } } for (int i = 0; i < 4; ++i) { for (int step = 0;; ++step) { int tx = st + step * dx[i]; int ty = ed + step * dy[i]; if (tx < 0 || tx >= 8 || ty < 0 || ty >= 8 || board[tx][ty] == 'B') { break; } if (board[tx][ty] == 'p') { cnt++; break; } } } return cnt; }