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6
CHAPTER 2 OPERATION
2.1 Parameters to be Entered from Dialog Boxes
When key entry is requested from a dialog box, the following four elements can be
written as parameters:
- Data formula
- Address formula
- Identifier
- File name specification
■ Data formula
A data formula consists of a term and an operator. Data formulas comply with C language formulas.
Almost C language formulas are recognized. Some points (e.g, line number and register specification) are
extended. Operations involving floating-point numbers and character strings are not supported. The
overflows that occur during the operation are ignored. Zero division results in an error.
■ Address formula
An address formula is an extension of the data formula; it represents a memory location. Like the data
formula, the address formula consists of a term and an operator. The terms and operators usable in address
formulas are the same as those in data formulas
■ Identifier
Alphabetic characters, numbers, and "_" can be used as identifiers. Each identifier must begin with a
character other than numbers. Uppercase characters are distinguished from lowercase characters or vice
versa.
■ File name specification
File name specification complies with Windows rules.