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Suppose I have the program below:


#include files

PREDICATE( add, 3 )
{
return A3 = (long)A1 + (long)A2;
}

Could someone please tell me what I am doing wrong that I get this Unhandled Exception error message:


0xC0000005: Access violation reading location 0x0000000c.

with a green pointer...

Have attended to my replies and revised my code.

Now, I was wondering if someone could tell me what I am doing wrong that I get this Unhandled Exception error message:


0xC0000005: Access...

I have included the complete programs for Hanoi, Factorial, and Backtracking below. I hope beginners will benefit from them. If anybody is not sure about VS2008 settings for interfacing C++ and...

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I have tried that, believe it or not!

I have tried all the examples in the SWI manual, including the foreign_t and PL_open_frame to no avail in this Robotics program in VS2008.

I am in...

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OK, thanks. That was useful. I left:


PL_initialise( 1, argv );

and got rid of the other 'if' check statement.

Good point tabstop, but what do you mean by "ust save the return code from the first time into a variable" ?

Thanks tabstop.

I made my argv a fixed-size array of characters, but the error message is persistent...


Original:

I am interfacing C++ and Prolog and I am trying to avoid the plld utility...

How do I do that, given that I am using the above as a Prolog engine initializer?

I'm actually trying to avoid plld and foreign_t complications by loading my Prolog sources and initializing them...

Does anyone know why including a term such as:


t = PL_new_term_ref();

would cause an Unhandled Exception error message:


0xC0000005: Access violation reading location 0x0000000c.

Could someone please guide me through backtracking in Prolog-C using the simple example below?

Here is my Prolog file:


likes( john, mary ).

likes( john, emma ).

likes( john,...

# include files

term_t tf;
term_t tx;
term_t goal_term;
functor_t goal_functor;

int main( int argc, char** argv )
{
argv[0] = "libpl.dll";

*

@ is apparently unknown!

It is loaded by the 'rc' file in the SWI home dir and realizes the XPCE binding. I should load this by hand, using:


consult( swi( 'plwin.rc' ) )

All my pl...

Upon loading into a C++ program a Prolog program that contains the command 'send' (xpce graphics), I get error messages of type:


Syntax Error: Operator Expected.

Here is an example...

I would like to work out a number's factorial. My factorial rule is in a Prolog file and I am connecting it to a C++ file. Can someone please tell me what is wrong with my interfacing C++ to...

I would like to work out a number's factorial. My factorial rule is in a Prolog file and I am connecting it to a C++ code. Can someone tell me what is wrong with my C++ interface please?



...

I have a large Prolog program with lots of predicates. I need to connect to this Prolog code from C++ (VS2008) to obtain certain query results. So I am not trying to embed Prolog in C++ as a logicasl...

I have a C++ application (prog.sln) which is my main program and I want to use Prolog as an embedded logic server (hanoi.pl)

int main(int argc, char** argv)
{
putenv( "SWI_HOME_DIR=C:\\Program...

Thanks for letting me know.

Actually, mine works fine too, but because I get an error message that indicates my Prolog code is not consulted, I thought perhaps I needed to add pl\bin to my PATH.
...

Guys,

How do I add:

pl\bin

to my VS2008 PATH?

I read in a forum post: . . . ensure pl\bin is in %PATH%

By 'consult' I mean compiling my Prolog program.

The program return something when you type in, say, hanoi(5).



hanoi( N ):-
move( N, left, middle, right ).

move( 0, _, _, _ ):-

I have a Prolog file (Hanoi.pl) containing the code for solving the Hanoi Towers puzzle:

hanoi( N ):-
move( N, left, middle, right ).

move( 0, _, _, _ ):-
!.

move(...

How do I add Prolog DLLs to VS2008 in order to embed Prolog within C++?

Are these three dlls sufficient:

libpl.lib
plterm.lib
pthreadVC.lib

Thanks,

My question is concerning argv[0].

I know (in theory) that on Unix, this argument passes the part of the command-line that is used to locate the executable. Prolog uses this to find the file...

I added these lines:

#pragma comment(lib, "libpl.lib")
#pragma comment(lib, "plterm.lib")
#pragma comment(lib, "pthreadVC.lib")
#pragma comment(dll, "libpl.dll")
#pragma...