UVA227 - Puzzle（紫书习题3.5）

#include <algorithm>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <cmath>
 
using namespace std;
 
char maps[5][7];
char cmd[1001];
 
int main()
{
	int cases = 0;
	while (gets(maps[0])) {
		if (maps[0][0] == 'Z') break;
		for (int i = 1 ; i < 5 ; ++ i)
			gets(maps[i]);
		int b_x = 0,b_y = 0;
		for (int i = 0 ; i < 5 ; ++ i)
			for (int j = 0 ; j < 5 ; ++ j)
				if (maps[i][j] == ' ') {
					b_x = i;b_y = j;
					break;
				}
		int count = 0;
		while (~scanf("%c",&cmd[count]))
			if (cmd[count] != '0') count ++;
			else break;
		cmd[count] = 0;getchar();
		
		int flag = 0,x = b_x,y = b_y;
		for (int i = 0 ; cmd[i] ; ++ i) {
			switch(cmd[i]) {
				case 'A':	x = b_x-1;y = b_y; break;
				case 'B':	x = b_x+1;y = b_y; break;
				case 'L':	x = b_x;y = b_y-1; break;
				case 'R':	x = b_x;y = b_y+1; break;
			}
			
			if (x < 0 || x > 4 || y < 0 || y > 4) {
				flag = 1;break;
			}else {
				maps[b_x][b_y] = maps[x][y];
				maps[x][y] = ' ';
				b_x = x; b_y = y;
			}
		}
		
		if (cases ++) printf("\n");
		printf("Puzzle #%d:\n",cases);
		
		if (flag)
			printf("This puzzle has no final configuration.\n");
		else {
			for (int i = 0 ; i < 5 ; ++ i) {
				printf("%c",maps[i][0]);
				for (int j = 1 ; j < 5 ; ++ j)
					printf(" %c",maps[i][j]);
				printf("\n");
			}
		}
	}
    return 0;
}