C in JBC Program

In jBASE 4.0 do any one know how to use a C method inside a JBC program. please advice
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NJOY LIFE TO THE FULLEST

Hi Iron,

Its very simple. Since jbc itself is a C compiler u can use jbc to compile your C program and also the JBC program.

Lets see an example.

C Program

This C program is used to add two numbers. The method ADD_TWO_NUMBER is used for this purpose. It gets 2 integer arguments and returns 1 integer argument.

File . , Record 'my.c'
Command->
0001 #include <jsystem.h>
0002
0003 int ADD_TWO_NUMBER (int num1, int num2)
0004 {
0005 int result = num1 + num2;
0006 return result;
0007 }

JBC program

This jbc program make use of the above C program to add two numbers. DEFC is the command to link a JBC program with a C program.

File . , Record 'myb.b'
Command->
0001 PROGRAM myb.b
0002 DEFC INT ADD_TWO_NUMBER(INT,INT)
0003 VA1 = 10;
0004 VA2 = 20;
0005 VA3 = ADD_TWO_NUMBER(VA1,VA2);
0006 PRINT VA3
0007 STOP

Compilation

Now compile both the programs using jbc

jbc -J04 myb.b my.c -o myapp

The optional parameter -JO4 informs the compiler that full optimization is to be carried out on the jBC and C code

Execution

Now execute the basic program.

myapp
30

Thats All
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M A L A I

Has anyone tried calling a C function in jBASE 4.1 If so can u please let me know with some examples

Thanks...
_________________
NJOY LIFE TO THE FULLEST

jbc
In the above example in jBASE4.0, the command compiles the jBC code , the C code, and produce the UNIX executable myapp.

i.e) Compilation of both the programs are done in a single shot.

jcompile
Instead of doing in a single shot. We can follow the steps given below.

1. Compile the C program and create a library file (.so and .so.el)
2. Compile the JBC program by linking the above library, and create the object file.
3. Execute the JBC object file.

I think this would be hepfull to you. Creating library files are already covered in this forum, make use of that.

If you still face any program, let me know about that.
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M A L A I

Hi.
I have the same problem. But i have no JBC compile in present.
Is there ani other way ?
I try to use jcompile, but recieved problem with no - JSYSTEM.H .
Help, plz