Ok so let assume that the file is open

Inside the file i have this text :


This is a test 1
This is a test 2
This is a test 3


So i want to put a the start of the file "00000"

so i use FPUTS(grrfile,"00000")

the result is

00000
s a test 1
This is a test 2
This is a test 3


so what can i do to dont lose text ????