Telephone

Telephone

#include<stdio.h>
#include<string.h>
main()
{
 FILE *t,*p;
 char another,choice;
  struct telephone
 {
  char name[30];
  long int code;
  long int number;
  };
  struct telephone data;
  char custname[30];
  long int n;
  long int recsize;

   t=fopen("TELEPHONE.DAT","rb+");
   if(t==NULL)
   {
       t=fopen("TELEPHONE.DAT","wb+");
   if(t==NULL)
   {
     printf("The File can't open\n");
exit();
}
}
     printf("          TELEPHONE DIRECTORY               \n");
printf("          *************               \n");

recsize=sizeof(data);

  while(1)
  {
  printf("\n\n");
   printf("1.Add Records\n");
   printf("2.List Records\n");
   printf("3.Modify Records\n");
   printf("4.Finding Number\n");
   printf("5.Finding Name\n");
   printf("6.Delete Records\n");
   printf("0.Exit\n");
   printf("Your Choice:");

   fflush(stdin);
   choice=getche();

   switch(choice)
   {
   case '1':

   fseek(t,0,SEEK_END);

   another='y';

   while(another=='y')
   {
   printf("\nEnter Customer name,Code number and Telephone number\n");
   scanf("%s  %ld %ld",data.name,&data.code,&data.number);
   fwrite(&data,recsize,1,t);

   printf("Add another data(y/n):");
   fflush(stdin);
   another=getche();
   printf("\n");
   }
   break;

   case '2':

   rewind(t);
   printf("\n");
   printf("---------------------------------------------\n");
   printf("|   CUSTOMER      |   CODE   |  TELEPHONE   |\n");
       printf("---------------------------------------------\n");
       rewind(t);

   while(fread(&data,recsize,1,t)==1)

   printf("|  %-18s %-2ld %12ld    |\n\n",data.name,data.code,data.number);
   printf("--------------------------------------------\n");
       getch();
 

   printf("\n");
   break;

   case '3':
   another='y';
   while(another=='y')
   {
   printf("\nEnter name of customer to modify:");
   scanf("%s",custname);
   rewind(t);
   while(fread(&data,recsize,1,t)==1)
   {
   if(strcmp(data.name,custname)==0)
   {
   printf("\nEnter new name,code and telephone number\n");
   scanf("%s %ld &ld",data.name,&data.code,&data.number);

   fseek(t,-recsize,SEEK_CUR);
                   fwrite(&data,recsize,1,t);
   break;
   }
   }
   printf("Modify another record(y/n):");
   fflush(stdin);
   another=getche();
   printf("\n");
   }

   break;


   case '4':

   another='y';
   while(another=='y')
   {
   printf("\nEnter name of customer:");
   scanf("%s",custname);

   rewind(t);
   while(fread(&data,recsize,1,t)==1)
   {
   if(strcmp(data.name,custname)==0)
   {
   printf("Telephone Number=%ld %ld\n",data.code,data.number);
   getch();
   }
   }
   printf("Find another number(y/n)? ");
   fflush(stdin);
   another=getche();
   printf("\n");
   }
   break;

   case '5':

   another='y';
   while(another=='y')
   {
   printf("\nEnter number of customer:");
   scanf("%ld",&n);

   rewind(t);
   while(fread(&data,recsize,1,t)==1)
   {
   if(data.number==n)
   {
   printf("The Name is %s\n",data.name);
   getch();
   }
   }
   printf("Find another name(y/n)? ");
   fflush(stdin);
   another=getche();
   printf("\n");
   }
   break;

   case '6':

   another='y';
   while(another=='y')
   {
   printf("\nEnter name of customer to delete:");
   scanf("%s",custname);

   p=fopen("TEMP.DAT","wb");

   rewind(t);
   while(fread(&data,recsize,1,t)==1)
   {
   if(strcmp(data.name,custname)!=0)
   fwrite(&data,recsize,1,p);
   }
   fclose(t);
   fclose(p);

   remove("TELEPHONE.DAT");
   rename("TEMP.DAT","TELEPHONE.DAT");

   t=fopen("TELEPHONE","rb+");
       
            printf("Delete another record(y/n):");
fflush(stdin);
another=getche();
   }
   break;


  case '0':

   printf("\n");
   fclose(t);
   exit();
   } 
   }
   }

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