John P. Grillo

Like its predecessor, Subroutine Sandwich by Grillo and Robertson (1983), More Subroutine Sandwich is a reference work, not a tutorial on how to become a BASIC programmer. And, like its predecessor, this book is divided into three parts.

Part One, Chapters 1 & 2, should be read in their entirety before moving on the the rest of the book. Part One tells how to use the book and how to incorporate its subroutines into larger BASIC programs.

Part Two, Chapters 3-10, contains 36 subroutines covering such diverse programming problems as: date processing, word processing, cryptography, mathematics, table management, statistics, table look-up and utilities, and business. Like its predecessor, this book presents each subroutine in a four-page spread that uses a fixed format: subroutine name, bibliographical reference, subroutine listing, variables, notes, calling program listing, and sample run.

Part Three, Chapters 11-15, consists of 5 mother programs, each using several of the subroutines found in Chapters 3-10: resort time-sharing weeks, text in adjacent columns, file protection, Chebyshev polynomial plotter, and probability of one pair in Poker.

Although these subroutines and programs were written in Radio Shack's Level II BASIC for TRS-80 Model I/III Microcomputers, their algorithms have survived and continue to find their way into Twenty-First Century applications.… (más)

This is not a textbook. It is a reference book filled with good, usable subroutines written in Level II BASIC for TRS-80 Model I/III Microcomputers. Since Level II BASIC is a dialect of Microsoft BASIC, these subroutines were easily converted for use with QBasic and QuickBASIC on IBM PCs and compatibles.

The first two chapters are a tutorial on how to incorporate subroutines into larger programs.

Chapters 3-11 contain 36 subroutines, each annotated in a four-page spread that uses a fixed format: subroutine name, bibliographical reference, subroutine listing, variables, notes, calling program listing, and sample run.

Chapters 12-16 consists of 5 mother programs, each using several of the subroutines found in Chapters 3-11: annotated calendar, binary addition drill and practice, tea selection, linear interpolation, and monthly sales data report.

Without being theoretical, this book shows by example how to do modular, structured programming in line-numbered BASIC.

I especially liked the chapters on date calculations, statistics, and plotting. Several of these subroutines use algorithms that still find their way into my programs twenty-five years after this book was written.… (más)