c - C中的回溯迷宫求解器

Question

我正在为迷宫编写查找路径解决方案 [30][30]我在路径查找功能中使用了回溯；这是伪代码:

bool find_path(myMap,myVisited,myPath,v,h)

1. 找到起点 [v,h] 然后为该点运行 find_path 函数
2. 将房间标记为已访问
3. 终止条件 1:如果 h=29，在路径上标记然后返回 true
4. 递归部分:搜索 8 个邻居:west、northwest、north、northeast、east、southeast、south、southwest。检查房间是否可访问，然后调用 find_path 函数，如果返回 true，则标记查找路径。
5. 终止条件 2:返回 false。

当我运行它时，它总是给出段错误。我尝试了不同的方法，但都给出了相同的错误？输出应该是这样的图像: http://postimg.org/image/cd8unwet5/这是我的代码:

// myMap ='.' is a block on map
//myVisited ='*' room visited
bool isSafe(char myMap[30][30], char myVisited[30][30], int v,int h){
if(v>=0||v<30||h>=0||h<30||myMap[v][h]!='.'||myVisited[v][h]=='*')return true;
    return false;}

//3 map
//myMap contain the maze
//myVisited use to mark room visited
//myPath is final path.
bool find_path(char myMap[30][30],char myVisited[30][30],char myPath[30][30], int v,int h){
//giving h=-1 and v=-1 , find starting point.
    if(h==-1&&v==-1){
        h=h+1;
        for (v=0;v<30;v++){
        if(myMap[v][h]!='.'&& h==0) {find_path(myMap,myVisited,myPath,v,h);}
        }

    }

    myVisited[v][h]='*';    //mark room as visited.
    if(h==29){              //stop when column is 29 and mark on path
        myPath[v][h]='*';
        return true;}

    if(isSafe(myMap,myVisited,v,h-1)==true){                //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v,h-1)==true){  // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
    //.......same code for other room

    if(isSafe(myMap,myVisited,v,h+1)==true){                //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v,h+1)==true){  // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }   
    if(isSafe(myMap,myVisited,v-1,h)==true){                //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v-1,h)==true){  // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
    if(isSafe(myMap,myVisited,v+1,h)==true){                //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v+1,h)==true){  // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
    if(isSafe(myMap,myVisited,v+1,h-1)==true){              //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v,h-1)==true){  // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
        if(isSafe(myMap,myVisited,v-1,h-1)==true){              //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v-1,h-1)==true){    // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
            if(isSafe(myMap,myVisited,v-1,h+1)==true){              //if room is okie to access
        if(find_path(myMap,myVisited,myPath,v-1,h+1)==true){    // there is way out 
        myPath[v][h]='*';           //mark on myPath
        }
    }
    myVisited[v][h]='.';
        return false;//back track 
return false;}

Answer 1

尝试使用这个

bool isSafe( char myMap[ 30 ][ 30 ], char myVisited[ 30 ][ 30 ], int v,int h ) {
    bool ret_val = true;

    ret_val = ( v >= 0 ) && ( v < 30 ) && ( h >= 0 ) && ( h > 30 ) && ( myMap[ v ][ h ] != '.' ) && ( myVisited[ v ][ h ] != '*' );

    return ret_val;

已编辑:感谢@NiBZ - 它看起来有点乱，但现在不会导致段错误