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Article Q27291
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Example Passing Numeric Variables from Basic to C by Value - Q27291
The program below demonstrates how to pass numeric values from
Basic to Microsoft C by value.
This information applies to the Standard and Professional Editions of
Microsoft Visual Basic version 1.0 for MS-DOS and to Microsoft C
Compiler version 7.0.
To compile this example in Visual Basic for MS-DOS, execute the
following commands:
BC BMODULE.BAS;
CL -c -AM CMODULE.C
LINK BMODULE.OBJ CMODULE.OBJ;
Basic Program
-------------
DECLARE SUB NumericValue CDECL (_
BYVAL p1 AS INTEGER,_
BYVAL p2 AS LONG,_
BYVAL p3 AS SINGLE,_
BYVAL p4 AS DOUBLE)
a% = 32767
b& = 32769
c! = 123.312
d# = 129381.333#
CLS
CALL NumericValue(a%, b&, c!, d#)
LOCATE 5, 1
END
C Routine
---------
#include <stdio.h>
void NumericValue(int a, long b, float c, double d) {
printf("INTEGER %d\", a);
printf("LONG %ld\", b);
printf("FLOAT %f\", c);
printf("DOUBLE %lf\", d);
}
Output
------
INTEGER 32767
LONG 32769
FLOAT 123.311996
DOUBLE 129381.333000