Texas Instruments TI-99/4A - Page 146

INPUT
DISPLAY.type Data
DISPLAY -ty~e uata lias the sallIe for III as ual<i eulel eu flOlll lite
keyboard. The computer knows the length of each data item in a
DISPLAY-type record by the comma separators placed between
items,
Each item in a DISPLAY-type record is checked to ensure that
numeric values are placed in numeric variables as shown on the
right in record 1. If the data-type doesn't match the variable-type. as
in Record 2 on the rig-ht UG is not a numeric value), an INPUT
ERROR will occur and the pro~ram will terminate.
INTERNAL-type Data
INTERNAL-type data has the following form:
Examples:
:>NEW
>100 OPEN 1113:"CS1",SEQUENTIA
L,DI5~LAy,INPUT,fIXED 64
>110 INPUT #13:A,B,STATE$,D$,
X,Y
--INPUT RECORD 1=22,97.6,
TEXAS,"AUTO LICENSE ",
22000,-.07
--INPUT RECORD 2=JG,22,TeXAG,
PROPERTY TAX,42,15
Numeric
items'
designates length
of item
(always 8)
value of item
Siring
items:
CIIII---'-----'-I-----"-~ ITIIJ
yLI ----------r---------'
designates length
of item
value
of item
The computer knows the length of each INTERN AL-type item by
interpreting the one'position length indicator at the beginning of
each item.
Limited validation of INTERN AL-type data-items is performed. All
numeric items must be 9 positions long (8 digits plus one position
which specifies the length) and must be valid representations of
floating-point numbers. Otherwise. an INPUT ERROR will occur.
and the program will terminate.
For FIXED-length INTERN AL records. reading beyond the actual
data recorded in each record will cause padding characters (binary
zeros) to be
read. If vou attempt to assign these characters to a
numeric variable, an INPUT ERROR occurs. If strings are being
read. a null string is assigned to the string variable,
11-126
User's Reference Guide