#include<stdio.h>
void main()
{float a;
 int i,s=0;
 FILE *fp; 
 fp=fopen("d:\\file","wb");
 if(fp==NULL)
   {printf("File can't be created.\n");exit(1);}
 else
   for(i=1;i<=10;i++)
     {scanf("%f",&a);
      fprintf(fp,"%6.2f",a);}
 fclose(fp);
 fp=fopen("d:\\file","ab");
 if(fp==NULL)
   {printf("File can't be opened.\n");exit(1);}
 else
   {printf("Please input the added data:\n");
    scanf("%f",&a);
    while(a!=0)
      {fprintf(fp,"%6.2f",a);
       scanf("%f",&a);}
    }
 fclose(fp);
 fp=fopen("d:\\file","rb");
 if(fp==NULL)
   {printf("File can't be opened.\n");exit(1);}
 else
   {fseek(fp,0L,2);
    printf("%ld",ftell(fp));}
 fclose(fp);
 }