if c language work object oriented anytime? if yes tell me how?

Yes, it can. Technically, there is nothing called object oriented programming. Object oriented programming mechanism is built over procedural language using 'this' pointer. Therefore, you can do OO programming using C itself as following - 1. Simply put the functions and data structure in a single file 2. Make the data structure static (equivalent to private in OO) 3. Mark all internal methods as static (equivalent to private in OO) 4. Those methods which will be accessed by the program outside of this file should not be static (equivalent to public OO) 5. Methods can take data structure instance as one of the arguments. (Not necessarily, functions should be invoked by any function pointer defined within the data structure) read less

The key word is "oriented", not "object". Even C++ code that uses objects but uses them like structs is not object oriented. C and C++ can both do OOP (aside from no access control in C), but the syntax for doing it in C is inconvenient (to say the least), while the syntax in C++ makes it very inviting. C is oriented to procedural, while C++ is oriented to objects, despite nearly identical core capabilities in that regard. Code that uses objects to implement designs that can only be done with objects (usually meaning taking advantage of polymorphism) is object oriented code. Code that uses objects as little more than bags of data, even using inheritance in an object oriented language, is really just procedural code that is more complicated than it needs to be. Code in C that uses function pointers that are changed around at run-time with structs full of data is kinda doing polymorphism, and could be said to be "object oriented", even in a procedurally oriented language. read less