Can someone help me on suggesting some ways to access the memory content in RAM directly from C/C++ source code.
Please provide me any book name or any URL so that I can get an exhaustive
knowledge over it.
If possible please give me some tips on interacting with hardwares directly
through C programmes.
"Interact directly with the hardware", that's the kernel's function, so, you need to learn Linux Kernel Module Programming, there are a lot of books out there.
It's advanced programming, but not hard programming.
Can you please be more specific in your question? 
Variables that you declare and store contents are in heap which are in RAM
Yes actually I have some informations stored in to the ram , let say when the programme is running. So , I want to access to those informations using my c++ programme.
Means to say exactly I want to access the memory content in RAM directly from my c++ programme.
But Thanks to all of you for your commets....
Please update me a lot on this .....