Java 在迷宫求解算法中,如何从错误路径返回?(爪哇)
我一直在尝试用java创建一个迷宫求解算法。我已经尝试使用回溯递归来实现它。以下是我的代码:Java 在迷宫求解算法中,如何从错误路径返回?(爪哇),java,recursion,backtracking,Java,Recursion,Backtracking,我一直在尝试用java创建一个迷宫求解算法。我已经尝试使用回溯递归来实现它。以下是我的代码: public static boolean solver(String[][] maze, int i, int j){ display(maze);//prints maze System.out.println(); maze[i][j] = "*"; if(maze[i][j+1] == "E" || maze[i][j-1] == "E" || maze[i+1]
public static boolean solver(String[][] maze, int i, int j){
display(maze);//prints maze
System.out.println();
maze[i][j] = "*";
if(maze[i][j+1] == "E" || maze[i][j-1] == "E" || maze[i+1][j] == "E" || maze[i-1][j] == "E")
display(maze);
else if(maze[i][j+1] != " " && maze[i][j-1] != " " && maze[i+1][j] != " " && maze[i-1][j] != " "){
maze[i][j] = " ";
return false;
}
if(maze[i][j+1] == " ")
if(!solver(maze,i,j+1))
maze[i][j] = " ";
if(maze[i][j-1] == " ")
if(!solver(maze,i,j-1))
maze[i][j] = " ";
if(maze[i+1][j] == " ")
if(!solver(maze,i+1,j))
maze[i][j] = " ";
if(maze[i-1][j] == " ")
if(!solver(maze,i-1,j))
maze[i][j] = " ";
return true;
}
以下是主要方法:
String[][] maze = {{"#","S","#","#","#","#","#","#","#","#","#","#","#"},
{"#"," "," "," "," "," ","#"," "," "," "," "," ","#"},
{"#"," ","#","#","#","#","#"," ","#","#","#"," ","#"},
{"#"," "," "," "," "," ","#"," ","#"," ","#"," ","#"},
{"#"," ","#","#","#"," ","#"," ","#"," ","#"," ","#"},
{"#"," "," "," ","#"," ","#"," "," "," ","#"," ","#"},
{"#"," "," "," ","#"," ","#"," "," "," ","#"," ","#"},
{"#"," ","#"," ","#"," "," "," "," "," "," "," ","#"},
{"#","#","#"," ","#","#","#","#","#","#","#","#","#"},
{"#"," "," "," ","#"," "," "," "," "," "," "," ","#"},
{"#"," ","#","#","#"," ","#","#","#","#","#"," ","#"},
{"#"," "," "," "," "," ","#"," "," "," "," "," ","#"},
{"#","#","#","#","#","#","#","#","#","#","#","E","#"}};
solver(maze,1,1);
这个算法可以解决一个迷宫,但是代码中有一个bug,我无法解决这个bug
输出:
#S###########
#*****# #
# ##### ### #
# # # # #
# ### # # # #
# # # # #
# # # # #
# # # #
### #########
# # #
# ### ##### #
# # #
###########E#
#S###########
#*** # #
#*##### ### #
# # # # #
# ### # # # #
# # # # #
# # # # #
# # # #
### #########
# # #
# ### ##### #
# # #
###########E#
正如你所看到的,它是这样来的,但返回时并不能正确地移除星星
如何解决这个bug?
< P>也许有助于从“迷宫”的具体表示中抽象出来,并将一个(完美)迷宫看作是二维网格上的无向图的生成树。然后你只需要在网格上实现你喜欢的任何寻路算法。“解决”迷宫只是在网格边界上的两个顶点之间找到一条路径 我已经基于这个图论视图实现了许多迷宫生成和寻路算法,您可以在这里找到我的代码和演示应用程序:请阅读:这是否回答了您的问题?欢迎使用StackOverflow,如果需要了解答案,请添加更多说明和代码,因为它将尽快解决其他人的问题。