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Prolog foreign-interfacing with C++

Prolog foreign-interfacing with C++

Prolog foreign-interfacing with C++


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

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

move( 0, _, _, _ ):-
move( N, A, B, C ):-
    M is N-1,
    move( M, A, C, B ),
    inform( A, B ),
    move( M, C, B, A ).

inform( X, Y ):-
    write( 'move a disk from ' ),
    write( X ),
    write( ' to ' ),
    writeln( Y ).

This is the C++ file I have written in VS2008 that should call hanoi(5) and pass the results of Hanoi.pl back to VS2008:

#include <iostream>
using namespace std;
#include "SWI-cpp.h"
#include "SWI-Prolog.h"

predicate_t  phanoi;
term_t  t0;

int main(int argc, char** argv)
    long  n = 5;
    int  rval;

    PL_put_integer( t0, n );

    phanoi = PL_predicate( "hanoi", 1, NULL );

    rval = PL_call_predicate( NULL, PL_Q_NORMAL, phanoi, t0 );

    system( "PAUSE" );

How can I consult my Prolog source code (Hanoi.pl) from within my C++ code?  Not from the Command Prompt - from the code, something like include or consult or compile?

Many thanks,

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