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Chapter 14. Statement Reference
210
Syntax:
FIELD [#]filenumber,fieldwidth AS fieldvariable
[,fieldwidth AS fieldvariable...]
Parameter:
filenumber
A numeric expression which returns a value from 1 to 16.
fieldwidth
A numeric expression which returns a value from 1 to 254.
fieldvariable
A non-array string variable.
Description:
FIELD
declares the length and field variable of each field of a record in a data file.
•
filenumber
is the file number of a data file opened by the
OPEN
statement.
•
fieldwidth
is the number of bytes for a corresponding field variable.
• You can assign a same field variable to more than one field.
• There is no difference in usage between a field variable and a general variable
except that no register variable, common variable, or array variable can be used
for a field variable.
• A record can contain up to 16 fields. The total number of bytes of all
field-
width
s plus the number of fields should not exceed 255.
• If a
FIELD
statement executes for an opened file having the number of fields or
field width unmatching that of the
FIELD
specifications except for field variables,
a run-time error will occur.
• If more than one
FIELD
statement is issued to a same file, the last one takes
effect.
File I/O statement
FIELD
Allocates string variables as field variables.
Содержание BHT-BASIC 100 SERIES
Страница 1: ......
Страница 161: ...153 Chapter 10 Sleep Function CONTENTS 10 1 Sleep Function 154...
Страница 163: ...155 Chapter 11 Resume Function CONTENTS 11 1 Resume Function 156...
Страница 173: ...165 Chapter 13 Backlight Function CONTENTS 13 1 Backlight Function 166...
Страница 192: ...Chapter 14 Statement Reference 184 Example OPEN master Dat AS 1 FIELD 1 20 AS bar 10 AS ky CLFILE 1 CLOSE 1...
Страница 249: ...241 Example CLOSE IF kyIn Y THEN KILL Master Dat END IF Reference Statements CLFILE...
Страница 349: ...341 Run time errors Error code Meaning 05h Parameter out of the range checktype is out of the range...
Страница 383: ...375 Run time errors Reference Error code Meaning 05h Parameter out of the range Functions LEFT LEN and RIGHT...