Vector Basic Interpreter Basic 80, Справочное руководство

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CVI«2-byte string»
CVS«4-byte string»
CVD«S-byte string»
Disk
Convert string values to numeric values.
Numeric values that are read in from a random
disk file must be converted from strings back
into numbers. CVI converts a 2-byte string to
an integer. CVS converts a 4-byte string to a
single precision number. CVD converts an S-byte
string to a double precision number •
•
70 FIELD #1,4 AS N$, 12 AS B$, •••
SO GET #1
90 Y=CVS(N$)
See also MKI$, MKS$, MKD$, Section 3.25 and
Appendix B.
Returns -1 (true) if the end of a sequential
file has been reached. Use EOF to test for
end-of-file while INPUTting, to avoid "Input·
past end" errors.
10 OPEN "I",1,"DATA"
20 C=O
30 IF EOF(1) THEN 100
40 INPUT
if
1 ,M (C)
50 C=C+1:GOTO 30