#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#define SIZE 30
struct purchase
{
    char pur_desc[SIZE];
    int pur_unit;
    int pur_quantity;
    int pur_total;
};
void main()
{

          FILE *fp,*fout;
          char *filename;
          int grnd_total=0;
          struct purchase p1;
          int flag=0;
          p1.pur_quantity=99;
          p1.pur_total=0;
          clrscr();

          fp=fopen("input11.txt","w");

          if(fp==NULL)
          {
            printf("\n THE FILE CANNOT BE OPENED");
            exit(getch());
          }

          printf("\n ENTER 0 FOR THE QUANTITY TO TERMINATE......");
          while(p1.pur_quantity!=0)
          {
             flushall();
             printf("\n ENTER THE DESCRIPTION OF THE ITEM ::");
             scanf("%[^\n]",p1.pur_desc);
             flushall();
             printf("\n ENTER THE UNIT PRICE OF THE ITEM::");
             scanf("%d",&p1.pur_unit);
             flushall();
             printf("\n ENTER THE QUANTITY OF THE ITEM::");
             scanf("%u",&p1.pur_quantity);
             p1.pur_total=p1.pur_unit*p1.pur_quantity;
             fprintf(fp,"%s %d %u %d\n",p1.pur_desc,p1.pur_unit,p1.pur_quantity,p1.pur_total);
          }
          clrscr();
          fclose(fp);
          fp=fopen("input11.txt","r");
          fout=fopen("output11.txt","w");
          fprintf(fout,"\n THE INFORMATION OF THE BUYER IS AS FOLLOWS::");
          fprintf(fout,"\n DESCRIPION\tUNIT PRICE\tQUANTITY\tTOTAL");
          while(fscanf(fp,"%s %d %u %d",p1.pur_desc,&p1.pur_unit,&p1.pur_quantity,&p1.pur_total)!=EOF)
          {
           if(p1.pur_quantity!=0)
           {
             flag=1;
             fprintf(fout,"\n %s\t\t    %d\t           %u\t         %d",p1.pur_desc,p1.pur_unit,p1.pur_quantity,p1.pur_total);
             grnd_total=grnd_total+p1.pur_total;
           }
          }
          fclose(fp);
          if(flag==0)
          {
             fprintf(fout,"\n THERE IS NO RECORD IN THE FILE");
             exit(getch());
          }
          else
          {
              fprintf(fout,"\n THE GRAND TOTAL===\t\t\t        %d",grnd_total);
              getch();
          }
}



*********************INPUT****************************************
rice 10 10 100
tea 70 2 140
df 0 0 0


*********************OUTPUT****************************************
 THE INFORMATION OF THE BUYER IS AS FOLLOWS::
 DESCRIPION    UNIT PRICE    QUANTITY    TOTAL
 rice            10               10             100
 tea            70               2             140
 THE GRAND TOTAL===                    240