写一下8皇后问题的伪代码
时间: 2023-11-13 11:12:55 浏览: 63
以下是8皇后问题的伪代码:
```
function solveQueensProblem(board, row):
if row == board.size:
return true
for col from 0 to board.size:
if isSafe(board, row, col):
board[row][col] = 1
if solveQueensProblem(board, row+1) == true:
return true
board[row][col] = 0
return false
function isSafe(board, row, col):
for i from 0 to row-1:
if board[i][col] == 1:
return false
i = row-1, j = col-1
while i >= 0 and j >= 0:
if board[i][j] == 1:
return false
i = i - 1, j = j - 1
i = row-1, j = col+1
while i >= 0 and j < board.size:
if board[i][j] == 1:
return false
i = i - 1, j = j + 1
return true
```
其中,`board`是一个二维数组,表示棋盘,`row`表示当前要放置的行数。`solveQueensProblem`函数用递归的方式解决问题,尝试在当前行的每一列放置皇后,如果能找到一个解就返回true,否则回溯。`isSafe`函数用来检查当前位置是否安全,即没有被其他皇后攻击到。