Thread: delete a record,urgent!!!!!!

i am writing to delete a specific record in a file and how can i do that???
User will enter their reference number, if it is same as that in file, detail will be printed.After that, how can i delete that record??????
pls help!!


in=fopen("customer.dat","a");
if (in==NULL)
printf("File could not opened !\n");

printf("\t\tPlease enter Reservation Number for deletion\n"
printf("\t\tYour reservation number : ");
scanf("%d",&input);


while(!feof(in))
{
fscanf(in,"%d%d%d",&ref,&classno,&count);
if (input==ref)
{
printf("\t\t%5d%15d%8d\n",ref,classno,count);
printf("\n\t\t\t\tDelete (Y/N) : ");
scanf("%d",&ans4);

Just check to see if they entered 'Y' and then you have two options.

1. Set the record values to a pre-set identifier like '-1' so that you know it has been deleted. Then just set your options that handle the records to skip the ones with that value.

2. If you want to total remove it, use a for loop and start at the deleted record and replace each record with the one after it.

If you need more help, pick which one you want to do and post the rest of the code. I won't be able to look at it until tomorrow afternoon, but someone else may get to it before then.