制作骑士之旅的版本。该程序的行为与我认为给出我的代码的方式不同。我有几个不同的奇怪的差异。虽然我为它设置了参数，但“骑士”已经超出了界限。还有更多的动作比应该给我的while循环。混淆i值，j值和while循环中的数字，你会得到几个奇怪的结果。我现在将值设置为32只是为了看看会发生什么。这是代码和结果：
#include <iostream>
int board[8][8];
void printBoard();
bool openSpace(int i,int j);
int startingPoint=0, m , n, i , j;
using namespace std;
int main()
{
i=4;
j=2;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
std::fill_n(&board[0][0], sizeof(board) / sizeof(**board), -1);//set all points to -1
//Set the starting point to zero
board[i][j] = startingPoint;//plot the starting point
while(startingPoint<32)//for the first 32 points
{
if (i-2>0)
{
if(j+1<8)
{
m=i-2;
n=j-2;
if (openSpace(m,n))
{
startingPoint++;
i=i-2;
j=j+1;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if(j-1>0)
m=i-2;
n=j-1;
if (openSpace(m,n))
{
startingPoint++;
i=i-2;
j=j-1;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if (i-1>0)
{
if(j+2<8)
{
m=i-1;
n=j+2;
if (openSpace(m,n))
{
startingPoint++;
i=i-1;
j=j+2;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if(j-2>0)
m=i-1;
n=j-2;
if (openSpace(m,n))
{
startingPoint++;
i=i-1;
j=j-2;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if (i+1<8)
{
if(j+2<8)
{
m=i+1;
n=j+2;
if (openSpace(m,n))
{
startingPoint++;
i=i+1;
j=j+2;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if(j-2>0)
m=i+1;
n=j-2;
if (openSpace(m,n))
{
startingPoint++;
i=i+1;
j=j-2;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if (i+2<8){
if(j+1<8)
{
m=i+2;
n=j+1;
if (openSpace(m,n))
{
startingPoint++;
i=i+2;
j=j+1;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}
if(j-1>0)
m=i+2;
n=j-1;
if (openSpace(m,n))
{
startingPoint++;
i=i+2;
j=j-1;
board[i][j]=startingPoint;
cout<<"Move: "<<startingPoint<<" Coordinates: "<<i<<","<<j<<endl;
}
}else{
cout<<"I don't understand"<<endl;
}
}//end while
printBoard();
}
void printBoard()
{
//We need to loop through each row one by one
for (int row=0; row<8; row++)
{
//now loop through each column in the row
for(int column=0; column<8; column++)
{
cout<<board[row][column]<<" ";
}
cout<<endl;
}
cout<<endl;
}
//Check for open surrounding spaces
bool openSpace(int m,int n){
if (board[m][n] == -1)
return true;
else
return false;
}
结果：
Move: 0 Coordinates: 4,2
Move: 1 Coordinates: 2,3
Move: 2 Coordinates: 0,2
Move: 3 Coordinates: 1,4
Move: 4 Coordinates: 2,2
Move: 5 Coordinates: 4,3
Move: 6 Coordinates: 6,2
Move: 7 Coordinates: 4,3
Move: 8 Coordinates: 3,5
Move: 9 Coordinates: 4,7
Move: 10 Coordinates: 5,5
Move: 11 Coordinates: 7,6
Move: 12 Coordinates: 5,7
Move: 13 Coordinates: 3,6
Move: 14 Coordinates: 2,4
Move: 15 Coordinates: 3,2
Move: 16 Coordinates: 5,3
Move: 17 Coordinates: 7,2
Move: 18 Coordinates: 5,3
Move: 19 Coordinates: 4,5
Move: 20 Coordinates: 3,3
Move: 21 Coordinates: 4,1
Move: 22 Coordinates: 6,0
Move: 23 Coordinates: 4,-1
Move: 24 Coordinates: 3,1
Move: 25 Coordinates: 2,-1
Move: 26 Coordinates: 3,-3
Move: 27 Coordinates: 5,-2
Move: 28 Coordinates: 4,0
Move: 29 Coordinates: 5,2
Move: 30 Coordinates: 6,0
I don't understand
Move: 31 Coordinates: 7,-2
I don't understand
Move: 32 Coordinates: 5,-1
Move: 33 Coordinates: 6,1
I don't understand
-1 -1 2 -1 -1 -1 -1 -1
-1 -1 -1 -1 3 -1 -1 25
-1 -1 4 1 14 26 -1 -1
-1 24 15 20 -1 8 13 23
28 21 0 7 -1 19 27 32
-1 -1 29 18 -1 10 -1 12
30 33 6 -1 -1 -1 31 -1
-1 -1 17 -1 -1 -1 11 -1
Process returned 0 (0x0) execution time : 0.172 s
Press any key to continue.
所以是的，为什么有34个动作，为什么要离开？
答案 0 :(得分：1)
我认为问题很少。
首先，你一个接一个地检查允许的移动
while (starting point<32){
if (not over right board){
}
if (not over left board){
}
....
}
这意味着在检查if循环之前，多个while语句都可以为真，因此您超过了32的限制。每次移动后都可以使用continue语句到循环的开始并进行检查，或者你必须在每次移动后进行比较，然后从循环中进行break。
然后你在几个地方缺少括号{。
然后正如第一篇中的felix指出的那样，如果你应该n=j+1而不是n=j-2。
您可能需要考虑轻微重写代码以便于阅读。例如，你可以创建一个试图移动的函数，并返回true，它是成功的。
bool tryToMove(int stepI, int stepJ){
int n = i+stepI;
int m = j+stepJ;
if (n>=0 && n<8 && m>=0 && m<8 && openSpace(n,m)){
i = n;
j = m;
board[i][j] = startingPoint;
return true;
}
return false;
}
你可以像
一样使用它if (tryToMove(-2,1)){
if (startingPoint == 32) break;
}
if (tryToMove(-2,-1)){
if (startingPoint == 32) break;
}
...
或改为使用continue，但这会改变移动的顺序。
与您的代码相比，将会有更多的比较，但更容易看到发生了什么。