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Revision as of 15:20, 5 September 2009 by imported>Cyperium
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Purpose: To convert string values to numeric values.

Syntax: CVI(2-byte string)

Comments: Numeric values read in from a random-access disk file must be converted from strings back into numbers if they are to be arithmetically manipulated.

CVI converts a 2-byte string to an integer. MKI$ is its complement.

CVS converts a 4-byte string to a single-precision number. MKS$ is its complement.

CVD converts an 8-byte string to a double-precision number. MKD$ is its complement.

(See MKI$, MKS$, and MKD$).


FIELD #1, 4 AS N$, 12 AS B$...
GET #1

Line 80 reads a field from file #1, and converts the first four bytes (N$) into a single-precision number assigned to the variable Y.

Since a single-precision number can contain as many as seven ASCII characters (seven bytes), writing a file using MKS$ conversion, and reading with the CVS conversion, as many as three bytes per numbe r recorded are saved on the storage medium. Even more may be saved if double-precision numbers are required. MKD$ and CVD conversions would be used in this case.