how to store a node on hard disk

when we make a node while programming as soon as the programm finishes it is lost or so to say. at which address
was the node stored cant be know ,unless those address were being stored in some file.even if we store that. it is not neccessary
that the node would be found there when again i run a new programm to search for the nodes which i created in some other programm.there are chances that one or two nodes might still
be found on ram.but if immediatly done.what if i was to find the nodes which i created today after two three days and meanwhile
all my neighbours were watching movies on my computer
certainly the space occupied by the nodes would have been used by the newly run programmes.only way to make a node permanent is to store it on hard-disk.but i dont know how to store some thing on hard disk and is its pattern of accessing the address or memory locations similar to the way we access memory locations on ram.ofcourse when i create a text file it is stored at some permanent memory location that is why i can open it anytime i want to but that is a inbuilt utility of c that it automatically stores it at some address or what ever it does to make it permanently available.but what if i want to store the node somewhere permanently.

Under normal circumstances, anything you create in memory will be freed up when your program exits. There would be no way to get back to it, even if you new the address, as the OS could and would reuse that memory at anytime.

Some OS's support shared memory segments, which you can initialise in one program, and they last until a program (either the same one, or a different one), explicitly free them. (Reboot also clears them)

However, if you are just looking to store data, then disk is the place. Try investigating fopen(), fclose(), fread(), fwrite().

Post again if this doesn't help you.

the functions you have given are for files
i am not using files
i want to store an independent node on harddisk
as i understand i might have to access fat for that
but i dont know
i dont want to use c feature of files
cant a node be stored on the hard disk as the scattered data
if fat has to be accessed then how?

>i am not using files
You should be if you want to store anything and get it back later.

>i want to store an independent node on harddisk
Memory addresses assigned to your nodes will change when the program ends so you can't save the address. You need to save the contents of the node in a file and retrieve it later, rebuilding the list.

>i dont want to use c feature of files
Files are not a C feature, C just makes use of them because that's the sensible thing to do. Take UNIX for example, everything is a file so it is only logical to read from and write to files. :rolleyes:

>cant a node be stored on the hard disk as the scattered data
Sure, but the real question is do you want that data back at some point? If you said yes then you're going in the wrong direction.

-Prelude