Introduction

Overview

C++ was created by Bjarne Stroustrup in 1979 as an extension of the C programming language ('C with Classes'). It adds object-oriented features while maintaining C's speed and low-level memory control, making it perfect for systems software, game engines, and high-performance applications.

Syntax

cpp

// C++ is an evolution of C
// Key additions over C include:
// - Classes and Objects (OOP)
// - Templates (Generic Programming)
// - Exception Handling
// - Standard Template Library (STL)

Common Pitfalls

Assuming C++ is exactly the same as C. While C++ is almost a superset of C, there are subtle differences in type checking and keywords.

Interview Tips

Be prepared to explain the difference between C and C++ (e.g., C++ supports OOP and function overloading, C does not).
Understand why C++ is a 'compiled' language and how the compilation process works (Preprocessing -> Compilation -> Assembly -> Linking).

Real-World Example

Understanding the evolution from C to C++.

example

cpp

/* 
  C approach: Procedural
  struct Car { int speed; };
  void accelerate(struct Car* c) { c->speed++; }
  
  C++ approach: Object-Oriented
  class Car {
  private:
      int speed;
  public:
      void accelerate() { speed++; }
  };
*/

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