BASIC

BASIC

BASIC is a high-level programming language that is an extension of the Dartmouth BASIC (Beginners All-purpose Symbolic Instruction Code) language. It is the principal programming language bundled with the D3 system and was designed for the implementation of application requirements not inherent in standard D3 functionality.

BASIC source can contain any number of statements in any order and can be stored as source programs or subroutines called by other programs, processing codes or VB modules. BASIC programs are created an editor of choice and reside as item within a data file.

Prior to execution, the programs must be compiled to convert the source program into object code. Compiled object items are stored in the dictionary of the data file that contains the source code. Compiled programs can be cataloged as commands within the master dictionary. Subroutines must be cataloged as commands within the master dictionary.

BASIC source code can be compiled in the traditional way, or it can be optimized or flashed.

  1. BASIC overview
    This general overview includes information on these topics:
  2. BASIC clauses
    The following BASIC clauses are available.
  3. BASIC functions
    The following BASIC functions are available.
  4. BASIC operators
    The following BASIC operators are available.
  5. BASIC reserved characters
    The following BASIC reserved characters are available.
  6. BASIC statements
    The following BASIC statements are available.
  7. BASIC user exits
    User exits allow calling direct system code from a BASIC oconv or iconv function. Many of the functions performed by user exits can be achieved by using the system() function or the execute statement with the appropriate TCL command or BASIC statement.
  8. FlashBASIC C functions
    This section includes the following FlashBASIC C function topics.
  9. Compiling programs
    Compiling a BASIC program converts the source code into a list of binary instructions called object code.
  10. FlashBASIC modules
    This section includes the following FlashBASIC modules topics.
  11. Using the COM interface to FlashBASIC
    This topic describes the COM interface to FlashBASIC. The objective is to allow a FlashBASIC module to act as an Automation Controller. This module can be a main, a trigger, or a rule module.
  12. FlashBASIC triggers
    Triggers are FlashBASIC subroutines that accept one argument called when an operation is performed on a record or a table. Persistent data can be stored using named commons. Some information about the context in which the trigger is called is obtained by either using the FlashBASIC access() function or using predefined environment variables.
  13. BASIC screen utilities
    Screen utilities are used to display formatted menus.