pat乙级-1002 写出这个数 (20)

#define N 10000
int main()
{
 int a,k,sum,i,j,p[N];
  char c[N];
  char *b[10]={"ling","yi","er","san","si","wu","liu","qi","ba","jiu"};
    sum=0;
   gets(c);
  for(k=0;c[k]>0;k++)
  {
    a=(c[k]-'0')%10;
    sum=sum+a;
    c[k]=(c[k]-'0')/10;
  }
  for(i=0;sum>0;i++)
  {
     p[i]=sum%10;
    sum=sum/10;
}
   for(i=i-1;i>0;i--)
  {
      j=p[i];
     printf("%s ",b[j]);
  }

  printf("%s",b[p[0]]);
  return 0;
}