Every compiler comes with some standard predefined functions which are available for your use. These are mostly input/ouput functions, character and string manipulation functions, and math functions. We will cover most of these in subsequent chapters. In addition, most compilers have additional functions predefined that are not standard but allow the programmer to get the most out of his particular computer. In the case of the IBM-PC and compatibles, most of these functions allow the programmer to use the BIOS services available in the operating system, or to write directly to the video monitor or to any place in memory.
The Applix equivalents are included in the header files mentioned elsewhere. These will not be covered in any detail as you will be able to study the unique aspects of your compiler on your own. Many of these kinds of functions are used in the IBM versions of the example programs in chapter 14.
The Applix equivalents are included in the header files mentioned elsewhere. These will not be covered in any detail as you will be able to study the unique aspects of your compiler on your own. Many of these kinds of functions are used in the IBM versions of the example programs in chapter 14.
