poj 1002 ac 慢慢要找回编程的感觉

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define MAX_NUMBER  10000000
#define encode_number_of(a) (Encoded_numbers[(a)/3])
#define pos(a) ((a)%MAX_NUMBER)

char Source_characters[24] = {'A','B','C','D','E','F','G','H','I','J','K','L',
       'M','N','O','P','R','S','T','U','V','W','X','Y'};
char Encoded_numbers[8] = {'2','3','4','5','6','7','8','9'};
long Count_of_telephone[MAX_NUMBER] = {0};

long index_of_character(char C_array[],long length,char a)
{
   long index = -1 ;
   long i;
   for(i = 0 ;i< length; i++ )
  {
     if(C_array[i] == a)
    {
      index=i;
      break;
    }
  }
   return index;
}

void Transform_to_standard_number(char* Source_number,char* Result_number)
{
    char* src_ptr = Source_number;
    int Count = 0;
    while(*src_ptr)
    {
      if(*src_ptr == '-' || *src_ptr=='Q' || *src_ptr == 'Z')
      {
         src_ptr++;
         continue;
      }
      long index = index_of_character(Source_characters,24,*src_ptr);
      if(index == -1)
      {
         Result_number[Count] = *src_ptr;
      }
      else
      {
         Result_number[Count] = encode_number_of(index);
      }
      if(++Count == 3)
      {
         Result_number[Count] = '-';
         ++Count;
      }
      src_ptr++;
    }
    Result_number[Count]='\0';
}

void Report_number_count(char* reported_telephone)
{
     char Pure_telephone[8] = "";
     strncpy(Pure_telephone,reported_telephone,3);
     strncpy(Pure_telephone+3,reported_telephone+4,4);
     long Number_of_telephone = atol(Pure_telephone);
     Count_of_telephone[pos(Number_of_telephone)]++;
}


int main()
{
   long Case_total,Counter;
   int existFlag = 0;
   char Case_input[300] = "";
   char standard_format[9] = "";
   char number_string[8]="";
   scanf("%ld",&Case_total);
   for(Counter=1;Counter<=Case_total;Counter++)
   {
       scanf("%s",Case_input);
       Transform_to_standard_number(Case_input,standard_format);
       Report_number_count(standard_format);
       strncpy(Case_input,"",sizeof(Case_input));
       strncpy(standard_format,"",sizeof(standard_format));
   }
   for(Counter=0;Counter<MAX_NUMBER;Counter++)
   {
       if( Count_of_telephone[Counter] > 1)
       {
          sprintf(number_string,"%07ld",Counter);
          Transform_to_standard_number(number_string,standard_format);
          printf("%s %ld\n",standard_format,Count_of_telephone[Counter]);
          if(existFlag == 0)
          {
             existFlag = 1;
          }
       }
   }
   if(existFlag == 0)
   {
       printf("No duplicates.\n");
   }
   return 0;
}