Modules in C are called functions. C programs are typically written by combining user-created functions as well as “pre-packaged” functions found in the C Standard Library. For instance, printf() is a function that is found in the C Standard Library and is accessed through the stdio.h header file.
In this Unit, we are going to focus on creating our own functions. You can create a function that can do any kind of task. For instance, the function may display a message to the screen or compute a value. Let’s look at an example:
Type the above code into Dev C++ and run it. Describe what is happening here. Now, add a new function in this program. Perhaps you want to subtract the two numbers or multiply them, or find the greater or lesser than values. Make sure to upload your code and that it contains the original add function as well as the one you created.