Can I execute any c made prog without any os platform?

Question

I googled about it and somewhere I read ....

Yes, you can. That is happening in the case of embedded systems

I think NO, it's not possible. Any platform must have an operating system. Or else, your program must itself be an OS. Either soft or hard-wired. Without an operating system your component wouldn't work.

Am I right or can anybody explain me the answer? (I dont have any idea abt embedded systems...)

Answer 1

Of course you can. All a (typical) CPU needs is power and access to a memory, then it will execute its hard-coded boot sequence.

Typically this will involve reading some pre-defined address, interpreting the contents there as instructions, and starting to run them.

These instructions could of course come from a C program, although at this level it's more common to write the very early stages (called bootstrapping) in assembly.

This of course doesn't mean, if I were to read your question title literally, that any C program be run this way. If the program assumes there is an OS, but there isn't, it won't work. This should be pretty obvious.

Answer 2

You can run a program in a system without an Operating System ... and that program need not be an Operating System itself.

Think about all the computers (or processors if you prefer) inside a car: engine management, air conditioning, ABS, ..., ...
All of those system have a program (possibly written in C) running. None of the processors have an OS.

The Standard specifically differentiates between hosted implementations and freestanding implementations:

    5.1.2.1 Freestanding environment
1   In a freestanding environment (in which C program execution may take place
    without any benefit of an operating system), the name and type of the
    function called at program startup are implementation-defined. Any library
    facilities available to a freestanding program, other than the minimal set
    required by clause 4, are implementation-defined.
2   The effect of program termination in a freestanding environment is
    implementation-defined.

    5.1.2.2 Hosted environment
1   A hosted environment need not be provided, but shall conform to the
    following specifications if present.
    ...