POJ 1573 Robot Motion(小模拟）

题目链接

赤裸裸的模拟，判断终止语句放错，2Y。

 1 #include <stdio.h>

 2 #include <string.h>

 3 int main()

 4 {

 5     int n,m,s,i,num,x,y;

 6     char p[21][21];

 7     int o[21][21];

 8     while(scanf("%d%d%d%*c",&n,&m,&s)!=EOF)

 9     {

10         if(!n&&!m&&!s) break;

11         num = 1;

12         memset(o,0,sizeof(o));

13         for(i = 0;i <= n-1;i ++)

14         gets(p[i]);

15         x = 0;

16         y = s-1;

17         for(;;)

18         {

19             if(x >= n||y >=m||x < 0||y < 0)

20             {

21                 printf("%d step(s) to exit\n",num-1);

22                 break;

23             }

24             if(o[x][y])

25             {

26                 printf("%d step(s) before a loop of %d step(s)\n",o[x][y]-1,num-o[x][y]);

27                 break;

28             }

29             o[x][y] = num;

30             if(p[x][y] == 'E')

31             {

32                 y = y+1;

33             }

34             else if(p[x][y] == 'W')

35             {

36                 y = y-1;

37             }

38             else if(p[x][y] == 'S')

39             {

40                 x = x+1;

41             }

42             else if(p[x][y] == 'N')

43             {

44                 x = x-1;

45             }

46             num ++;

47         }

48     }

49     return 0;

50 }