C program to write data of a structure in existing file using fprintf()

#include<stdio.h>
#include<conio.h>
 struct emp
 {char name[20];
  int id;
  }e;
 void main()
 { char ch='y';
   int i;
   FILE *pk=fopen("keviv.txt","a+");
   clrscr();
    if(pk==NULL)
    { printf("\n\n FILE DOES NOT EXIST");
      getch();
      exit(0);
    }
   while(ch=='y')
   { printf("\n\n Enter records of employee:\n");
     printf("\n Enter name: ");
     scanf("%s",e.name);
     printf("\n Enter ID: ");
     scanf("%d",&e.id);
     //i=ftell(pk);
     //fseek(pk,i,0);
     fprintf(pk," %s %d\n",e.name,e.id);
     printf("\n\n Do u want to continue...(Y/N): ");
     fflush(stdin);
     scanf("%c",&ch);
   }
   fclose(pk);
 }