1. C follows the procedural programming paradigm while C++ is a multi-paradigm language(procedural as well as object oriented)
2. In case of C, the data is not secured while the data is secured(hidden) in C++
3. C is a low-level language while C++ is a middle-level language (Relatively, Please see the discussion at the end of the post)
4. C uses the top-down approach while C++ uses the bottom-up approach
5. C is function-driven while C++ is object-driven
6. C++ supports function overloading while C does not
7. We can use functions inside structures in C++ but not in C.
8. The NAMESPACE feature in C++ is absent in case of C
9. The standard input & output functions differ in the two languages
10. C++ allows the use of reference variables while C does not
11. C++ supports Exception Handling while C does not.