Specifications

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.