Is the C programming language object-oriented?

Question

I was talking with a co-worker about C and C++ and he claimed that C is object-oriented, but I claimed that it was not. I know that you can do object-oriented-like things in C,

Answer 1

Real programmers can write object-oriented code in ANY language.

But no, C is not an 'object-oriented' language. It has no concept of classes, objects, polymorphism, inheritance.