Interoperability Between C and C++ Code

Introduction

Interoperability between C and C++ is crucial when integrating code from both languages into a single application. In this exercise, we’ll explore techniques for mixing C and C++ code, and then write a program that combines elements from both languages.

Techniques for Interoperability:

1. Extern “C” Declarations: Use extern "C" to ensure C++ functions and variables have C linkage, making them compatible with C code.
2. Header Guards: When including C++ headers in C code, wrap the declarations with extern "C" and use header guards. 
3. Wrapper Functions: Create wrapper functions with C linkage that call C++ functions. These wrappers serve as an interface between C and C++ code. 
4. C++ Compilation: Ensure C++ code is compiled using a C++ compiler, and link C and C++ objects together. ## Exercise: Write a Program Combining C and C++ Code

Let’s create a simple program that calculates the square of a number. We’ll have a C++ function to calculate the square and a C function to call this function.

Conclusion

Feel free to explore and modify the problem to deepen your understanding.

As you continue your coding journey, remember that interoperability between C and C++ offers a powerful toolset for maximizing code reuse and creating versatile applications. Happy coding!