CVDMBF - QB64Official/qb64 GitHub Wiki
The CVDMBF function decodes an 8-byte STRING generated by MKDMBF$ (or read from a file) to DOUBLE numeric values.
Syntax
result# = CVDMBF(stringData$)
Description
- CV functions (CVD, CVS, CVI, CVL, CVDMBF, CVSMBF) are used to convert values encoded by MK$ functions (MKD$, MKS$, MKI$, MKL$, MKDMBF$, MKSMBF$).
- QB64 has _CV and _MK$ functions which can also deal with extended Data types.
- DOUBLE values can range up to 15 decimal point digits. Decimal point accuracy depends on whole value places taken.
Example(s)
Showcases the reduced space to store an encoded number.
a# = 77000.24523213
PRINT "Value of a#:"; a#
b$ = MKDMBF$(a#)
PRINT "Value of a# encoded using MKDMBF$: "; b$
PRINT "The string above, decoded using CVDMBF:"; CVDMBF(b$)
Value of a#: 77000.24523213
Value of a# encoded using MKDmbf$: 5─c▼d▬æ
The string above, decoded using CVDMBF: 77000.24523213
Since the representation of a double-precision number can use up to 15 ASCII characters (fifteen bytes), writing to a file using MKDMBF$ conversion, and then reading back with the CVDMBF conversion can save up to 7 bytes of storage space.