鱼c马踏棋盘
鱼c马踏棋盘如果用非递归该怎么修改呀 问题描述模糊,建议贴上代码,或者原题 连帅帅 发表于 2021-6-21 17:35问题描述模糊,建议贴上代码,或者原题
鱼c数据结构P61讲的马踏棋盘算法 wyj222 发表于 2021-6-21 17:36
鱼c数据结构P61讲的马踏棋盘算法
#include <stdio.h>
#include <time.h>
#define X 8
#define Y 8
int chess;
// 找到基于(x,y)位置的下一个可走的位置
int nextxy(int *x, int *y, int count)
{
switch(count)
{
case 0:
if( *x+2<=X-1 && *y-1>=0 && chess[*x+2][*y-1]==0 )
{
*x = *x + 2;
*y = *y - 1;
return 1;
}
break;
case 1:
if( *x+2<=X-1 && *y+1<=Y-1 && chess[*x+2][*y+1]==0 )
{
*x = *x + 2;
*y = *y + 1;
return 1;
}
break;
case 2:
if( *x+1<=X-1 && *y-2>=0 && chess[*x+1][*y-2]==0 )
{
*x = *x + 1;
*y = *y - 2;
return 1;
}
break;
case 3:
if( *x+1<=X-1 && *y+2<=Y-1 && chess[*x+1][*y+2]==0 )
{
*x = *x + 1;
*y = *y + 2;
return 1;
}
break;
case 4:
if( *x-2>=0 && *y-1>=0 && chess[*x-2][*y-1]==0 )
{
*x = *x - 2;
*y = *y - 1;
return 1;
}
break;
case 5:
if( *x-2>=0 && *y+1<=Y-1 && chess[*x-2][*y+1]==0 )
{
*x = *x - 2;
*y = *y + 1;
return 1;
}
break;
case 6:
if( *x-1>=0 && *y-2>=0 && chess[*x-1][*y-2]==0 )
{
*x = *x - 1;
*y = *y - 2;
return 1;
}
break;
case 7:
if( *x-1>=0 && *y+2<=Y-1 && chess[*x-1][*y+2]==0 )
{
*x = *x - 1;
*y = *y + 2;
return 1;
}
break;
default:
break;
}
return 0;
}
void print()
{
int i, j;
for( i=0; i < X; i++ )
{
for( j=0; j < Y; j++ )
{
printf("%2d\t", chess);
}
printf("\n");
}
printf("\n");
}
// 深度优先遍历棋盘
// (x,y)为位置坐标
// tag是标记变量,每走一步,tag+1
int TravelChessBoard(int x, int y, int tag)
{
int x1=x, y1=y, flag=0, count=0;
chess = tag;
// 如果tag==X*Y,则完成整个棋盘的遍历
if( tag == X*Y )
{
print();
return 1;
}
flag = nextxy(&x1, &y1, count);
while( 0==flag && count < 7 )
{
count++;
flag = nextxy(&x1, &y1, count);
}
while( flag )
{
if( TravelChessBoard(x1, y1, tag+1) )
{
return 1;
}
x1 = x;
y1 = y;
count++;
flag = nextxy(&x1, &y1, count);
while( 0==flag && count < 7 )
{
count++;
flag = nextxy(&x1, &y1, count);
}
}
if( 0 == flag )
{
chess = 0;
}
return 0;
}
int main()
{
int i, j;
clock_t start, finish;
start = clock();
for( i=0; i < X; i++ )
{
for( j=0; j < Y; j++ )
{
chess = 0;
}
}
if( !TravelChessBoard(2, 0, 1) )
{
printf("抱歉,马踏棋盘失败鸟~\n");
}
finish = clock();
printf("\n本次计算一共耗时: %f秒\n\n", (double)(finish-start)/CLOCKS_PER_SEC);
return 0;
} 1 #include<stdio.h>
int chess={0};
int cnt = 0;
int countChess = 0;
int move={{1,-2},{2,-1},{2,1},{1,2},{-1,2},{-2,1},{-2,-1},{-1,-2}};
int initChess();
void printChess();
void horse(int x, int y);
struct Node{
int x;
int y;
int i;
}chessStep;
int top = -1;
int main(void){
initChess();
int i,j;
for(i=2; i<10; i++){
for(j=2; j<10; j++){
cnt = 1;
chess = cnt;
horse(i,j);
}
}
}
void horse(int x, int y){
int i = 0;
while(cnt < 64){
int row;
int col;
for(i; i<8; i++){
row = x + move;
col = y + move;
if(chess == 0){
break;
}
}
if(i != 8){
chess = ++cnt;
chessStep[++top].x = x;
chessStep.y = y;
chessStep.i = i;
if(cnt == 64){
printChess();
chess = 0;
i = chessStep.i + 1;
x = chessStep.x;
y = chessStep.y;
top--;
cnt--;
}else{
x = row;
y = col;
i = 0;
}
}else{
chess = 0;
i = chessStep.i + 1;
x = chessStep.x;
y = chessStep.y;
top--;
cnt--;
}
if(top == -1){
break;
}
}
}
int initChess(){
int i,j;
for(i=0; i<12; ++i){
for(j=0; j<12; ++j){
if(i<2 || i>9 || j<2 || j>9){
chess=-1;
}
}
}
}
void printChess(){
++countChess;
printf("第%d个解是:\n", countChess);
int i,j;
for(i=2; i<10; ++i){
for(j=2; j<10; ++j){
printf("%2d ",chess);
}
printf("\n");
}
}
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