C is a procedural language and C++ is a mix of procedural programming and object oriented programming language.
In c++, one defines classes, creates objects, uses the methods (functions) defined within a class. It is safer programming language than C language. Debugging programming could be simpler in C++. Since the language is object oriented, it is easier to add or enhance features by including more objects/classes in an existing program. The code size could be very high in C++.
C++ contains every thing that C program can do.