C++ Programming

C vs C++: What Is the Real Difference?

By EG Digital Skills Training · Updated 18 October 2026

C++ began as an extension of C, so they look similar. But they encourage different ways of thinking, and knowing the difference helps you choose what to learn.

The big idea

C is a procedural language: you organise a program as functions that work on data. C++ keeps that style and adds object-oriented features, so you can also organise code as classes and objects.

Key differences

• Classes and objects, inheritance and polymorphism are part of C++, not C.
• C++ has the Standard Template Library with ready-made containers and algorithms.
• C++ adds references, function overloading, templates and exception handling.
• Input and output: printf and scanf in C, cout and cin commonly in C++.
• Text: C uses character arrays, while C++ also offers the std::string class.
• Memory: C uses malloc and free, while C++ uses new and delete, and modern code prefers smart pointers.

A small comparison

// C
#include <stdio.h>
int main(void) { printf("Hello\n"); return 0; }

// C++
#include <iostream>
int main() { std::cout << "Hello\n"; return 0; }

Which should you learn first?

• Learn C first if you want to understand memory, pointers and low-level basics, or your syllabus starts there.
• Start with C++ if you want object-oriented design, competitive programming or game and system development.
• Many students learn C first and then move to C++ smoothly.

Note that C++ is not strictly a superset of C. Some valid C code is not valid C++.