#include"stdio.h"
#define N 8 //因?yàn)樗愠鰜淼臄?shù)據(jù)太大，所以要算很久，可以改變N的值進(jìn)行測(cè)試。
#include"iostream.h" //此算法采用回溯法 enum bin{fal,tr}; //假如有更好的算法，請(qǐng)發(fā)e-mail給我。在此謝過。
int top=0;
long int num=0;
int row[]={-1,-2,-2,-1,1,2,2,1};
int col[]={-2,-1,1,2,2,1,-1,-2};
bin mark[N][N];strUCt stack
{
int x,y;
int dir;}board[N*N];void push(stack it)
{
board[top].x=it.x;
board[top].y=it.y;
board[top].dir=it.dir;
mark[board[top].x][board[top].y]=tr;
top++;
}
stack pop()
{
--top;
mark[board[top].x][board[top].y]=fal;
board[top].dir++;
return board[top];
}
bin empty()
{
if(top==0) return tr;
else return fal;
}
void main()
{
stack temp={N-1,N-1,-1};
push(temp);
while(!empty())
{
int g,h;
temp=pop();
int i=temp.x;
int j=temp.y;
int dir=temp.dir;
while(dir<8)
{
g=i+row[dir];
h=j+col[dir];
if((g<0)(h<0)(g>=N)(h>=N)mark[g][h]) dir++;
else {
if(g==0&&h==0) {num++;dir++;}
else {
temp.x=i;
temp.y=j;
temp.dir=dir;
push(temp);
i=g;
j=h;
dir=0;
}//else
}//else
}//while
}//while
cout<<"the total number is:"<<num;
getchar();
}//main
