C and C++ are programming languages with many similarities but some key differences. They both use basic built-in data types and control structures. However, C++ supports object-oriented programming features like classes, data hiding, and inheritance that are not present in C. C++ also supports function overloading, namespaces, and references, which provide more flexibility than C at the cost of additional complexity. Overall, C++ can be seen as an enhancement of C with additional high-level programming capabilities.