| C | C++ |
| * C language was developed by Dennis Ritchie. | * C++ language was developed by Bjarne Stroustrup. |
| * C is a structured programming language. | * C++ supports both structural and object-oriented programming language. |
| * C is a subset of C++. | * C++ is a superset of C. |
| * In C language, data and functions are the free entities. | * In the C++ language, both data and functions are encapsulated together in the form of a project. |
| * C does not support the data hiding. Therefore, the data can be used by the outside world. | * C++ supports data hiding. Therefore, the data cannot be accessed by the outside world. |
| * Namespace features are not present in C | * Namespace is used by C++, which avoids name collisions. |
| * Functions can not be defined inside structures. | * Functions can be defined inside structures. |
| * calloc() and malloc() functions are used for memory allocation and free() function is used for memory deallocation. | * new operator is used for memory allocation and deletes operator is used for memory deallocation. |
| * In C, scanf() and printf() are mainly used for input/output. | * C++ mainly uses stream cin and cout to perform input and output operations. |
