C语言实现字母接龙的小程序

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
main()
 {
  int i,j,c,flag,sign,counter;
  int array[10][10],area,x,y;
  for(i=0;i<10;i++)
   for(j=0;j<10;j++)
    array[i][j]=46;
  for(i=0;i<10;i++)
   {
     for(j=0;j<10;j++)
      printf("%c",array[i][j]);
     printf("\n");
    }
  srand((unsigned)time(NULL));
  printf("Notion!While the value of x and y less than 10 and positive integret,\n"
  "Please the beginning place of the game (x,y):");
  scanf("%d,%d",&x,&y);
  array[x][y]=65;
  for(c=66;c<=90;c++)
    {
      do
       {
        counter=rand()%4;
        switch(counter)
         {
          case 0:                                  /* Moving toward right*/
                 {
                  if(array[x][y+1]==46&&y+1<10)
                   {
                    array[x][++y]=c;
                    flag=1;
                    break;
                    }
                  else
                   {
                    flag=0;
                    break;
                    }
                 }

                                                /* Moving toward down*/
         case 1:
                 {
                  if(array[x+1][y]==46&&x+1<10)
                   {
                    array[++x][y]=c;
                    flag=1;
                    break;
                    }
                  else
                   {
                    flag=0;
                    break;
                    }
                  }
                                         /* Moving toward left*/
        case 2:
                 {
                  if(array[x][y-1]==46&&y-1>0)
                   {
                    array[x][--y]=c;
                    flag=1;
                    break;
                    }
                   else
                    {
                     flag=0;
                     break;
                     }
                  }
                                                    /* Moving toward up*/
        case 3:
                 {
                  if(array[x-1][y]==46&&x-1>0)
                   {
                    array[--x][y]=c;
                    flag=1;
                    break;
                    }
                  else
                   {
                    flag=0;
                    break;
                    }
                  }
        }
     }while(flag!=1);
     flag=0;
     sign=(array[x][y+1]==46||array[x][y-1]==46||array[x-1][y]==46||array[x+1][y]==46);
    if(sign==0)
     break;
    }

    for(i=0;i<10;i++)
     {
      for(j=0;j<10;j++)
       printf("%c",array[i][j]);
      printf("\n");
      }
    getch();
 }