Xopen - Sharp MZ-700 Basic Manual

50
XOPEN # (cross open)
Opens BRD file for read-out and
Format:
XOPEN # <logical number>," [<device name> :] <filename> "
Note: Only FDn device name.
Abbreviated form:
X.#
Explanation:
Opens the random access data file (BRD), and opens (cross opens) theread-out/write-
in of the random access data. Newly registers BRD files, prepares for data read-out
from, and new data write-in to, the BRD file, and defines the logical number for file
access.
Examples:
10 XOPEN #1," FD1: DATA"
20 NPUT" pr oduct no. ="; K
30 F K=O THEN 110
40 NPUT "product name=";NS
50
NPUT "unit price=";P
60
INPUT "st ock amount ="S
70
I NPUT "comment ="; CS
80 T
=
P*S
90 PR I NT # 1 (K
*
5
-4) ,
N$, P, S, T, C $
100 GOTO 20
1 1 0 CL OS E # 1
120 END
..... Cross opens (read-out, write-in) BRD files. The 5 items of input (product name,
unit price, amount in stock, total amount (T = total amount (P
*
S», and
comment are registered in the BRD file "DATA".