The significance of several basic functions of VFP programming

abs( take the absolute value sqrt(25) open square pi() cos(60*pi() 180) sine cosine mod(8,3) take the remainder space(5) take the space chr(66) take the character asc('b') take the encoding val("238") to str(365,5).

VFP program design is a database file that realizes database modification, addition, deletion, query and other functions through VFP database software.

VFP Programming is a database management system software. Visual FoxPro is a powerful object-oriented environment designed for database structure and application development.

Information Technology and Programming (VFP Language)" is a public compulsory basic course for clinical medicine, pharmacy, pharmacy, laboratory and other majors. It is based on the basic skills of mathematics, physics, computer and other courses, and further cultivates and improves students' ability to master the basic theoretical knowledge of information technology and the ability to use information technology to deal with practical problems, so as to lay a solid foundation for subsequent study of related majors.

For students majoring in clinical medicine, pharmacy, pharmacy, and testing, the VFP language is a widely used programming language.

The main research content of VFP programming is the use of database management system, through the learning of this course and the training of experimental skills and design ability, emphasizing the combination of theory and practice, and improving the ability to analyze and solve problems.

The first chapter of "VFP Programming Examples and Improvements: The Road to Practical Programming" consists of three chapters, the first chapter of which is the basics of object-oriented programming, introducing the basic concepts and concepts of object-oriented programming, including classes, objects, properties of objects, events of objects, and the order in which events occur. The second chapter introduces the VFP training case, and on the basis of reviewing the structured program design, it describes in detail the properties of various basic controls in Visual FoxPro and writes the corresponding ** in the events of the basic controls according to different purposes to achieve specific functions, makes full use of functions to reduce programming difficulty, data query methods, methods for creating visual classes, makes menus and reports, and implements multiple functions. Among them, there are many practical programs such as HANOI tower problem animation, product locking (time switch) technology, general query, converting Chinese characters to pinyin, using the camera to collect ** information, automatically generating error logs, audio ****, arranging the examination room, making and calling CHM help files, etc.

All examples detail the specific steps of programming, the corresponding object and its property values, and the entirety of the event or method. Chapter 3 introduces the example of VFP Level 2 of the National Computer Grading Examination, which aims to help readers pass the Level 2 Visual FoxPro of the National Computer Grading Examination on the basis of mastering the practical programming of Visual FoxPro.