Q61674: Machine Hangs When BASIC PDS 7.00 Tries to Call QuickC 2.00

Article: Q61674
Product(s): See article
Version(s): 7.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | SR# S900405-131 buglist7.00 S_QuickC | mspl13_basic
Last Modified: 11-MAY-1990

When CALLing Microsoft QuickC version 2.00 from Microsoft BASIC
Professional Development System (PDS) version 7.00, the machine hangs
if a single- or a double-precision number is passed to the C routine
and a comparison of that single- or double-precision number is then
performed in the C routine.

To work around this problem, do one of the following:

1. CALL QuickC from QuickBASIC version 4.50 or from Microsoft BASIC
   Compiler versions 6.00 or 6.00b.

2. Use Microsoft C Compiler version 5.10 instead of QuickC.

3. Pass an integer or a long integer to QuickC instead of the
   floating-point number.

The program below demonstrates the problem.

   Compile and LINK Instructions
   -----------------------------

      BC Basside.bas ;
      QCL /AM /c Cside.c ;
      LINK Basside + Cside,,,BRT70ENR.lib + MLIBCE.LIB ;

   Code Example
   ------------

   ' Here is the BASIC Code

   DECLARE SUB Mycfun CDECL (temp#)

   CLS
   PRINT "On the basic side"
   INPUT "Enter the double precision number "; one#
   CALL Mycfun(one#)
   LOCATE 10, 10
   PRINT "Enter any key to end"
   SLEEP
   CLS
   END

   ' Here is the C code

   #include <c:\qc2\include\stdio.h>

   void Mycfun( double *testdoub)
   {
     printf("I am in the C routine  %lf \n",*testdoub);
    if ((*testdoub) > 2000.0)
     {
        printf ("In the then \n");
     }
     else
     {
        printf("In the else \n");
     };

   printf ("Returning to BASIC \n");

   }

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