Write a C Program to appending data in file

Write a C Program to appending data in file

Program:

#include<stdio.h>
#include<conio.h>

struct invent_record
{
char   name[10];
int    number;
float  price;
int    quantity;
};

int main()
{
struct invent_record item;
char  filename[10];
int   response;
FILE  *fp;
long  n;
void append (struct invent_record *x, FILE *y);

printf("Type filename:");
scanf("%s", filename);

fp = fopen(filename, "a+");
do
{
append(&item, fp);
printf("\nItem %s appended.\n",item.name);
printf("\nDo you want to add another item\ (1 for YES /0 for NO)?");
scanf("%d", &response);
}  while (response == 1);

fseek(fp,0,SEEK_END);
n=ftell(fp);    
fclose(fp);

fp = fopen(filename, "r");

while(ftell(fp) < n)
{
fscanf(fp,"%s %d %f %d",
item.name, &item.number, &item.price, &item.quantity);
fprintf(stdout,"%-8s %7d %8.2f %8d\n",
item.name, item.number, item.price, item.quantity);
}
fclose(fp);
getch();
}
void append(struct invent_record *product, FILE *ptr)
{
printf("Item name:");                                       
scanf("%s", product->name);                                 
printf("Item number:");                                     
scanf("%d", &product->number);                              
printf("Item price:");                                      
scanf("%f", &product->price);                               
printf("Quantity:");                                        
scanf("%d", &product->quantity);                            
fprintf(ptr, "%s %d %.2f %d",                               
product->name,                                
product->number,                              
product->price,                               
product->quantity);                           
} 
-------------------------------------------------------------------------
Output:

Type filename:Shivam
Item name:Soap
Item number:2
Item price:40
Quantity:5

Item Soap appended.

Do you want to add another item (1 for YES /0 for NO)?1
Item name:color
Item number:3
Item price:5
Quantity:12

Item color appended.

Do you want to add another item (1 for YES /0 for NO)?0
Soap           2    40.00        5
color          3     5.00       12

--------------------------------
Process exited after 135.8 seconds with return value 0
Press any key to continue . . .