If any deletes a file, where exactly is located in c drive. How recover it back if recycle bin icon is not there on deskcop?

Where is your recycle bin at ?

If it hasn't been emptied then you can recover it from there.

What OS are you using?

You can check to see if it is in windows explorer

Also as mentioned above, what OS using as

Recover XP
Restore Recycle Bin icon in Windows Vista / XP - Tips & Tweaks

Recover bin Vista
How to recover or restore a missing Recycle Bin icon in Windows Vista

These pics may also help
Restore Missing Desktop Icons in Windows 7 or Vista - How-To Geek