


How to Separate C Class Declarations and Member Function Implementations into Header and Source Files?
Separating Class and Member Functions into Header and Source Files
In C , classes can be declared and implemented in separate header and source files. This allows for easier management and organization of code.
Class Declaration in Header File:
The header file (.h) contains the class declaration, which includes the name, data members, and member function prototypes. Include guards are used to prevent multiple inclusions.
// A2DD.h #ifndef A2DD_H #define A2DD_H class A2DD { public: A2DD(int x, int y); int getSum(); }; #endif
Class Implementation in Source File:
The source file (.cpp) contains the implementation of the class's member functions. The functions are defined using the class's scope operator (::).
// A2DD.cpp #include "A2DD.h" A2DD::A2DD(int x, int y) { gx = x; gy = y; } int A2DD::getSum() { return gx + gy; }
Syntax for Using the Class:
To use the class, include the header file in the main file. Instantiation of the class and access to its member functions is done as follows:
// main.cpp #include "A2DD.h" int main() { A2DD a(1, 2); int sum = a.getSum(); return 0; }
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