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#include <stdio.h>
#include <SWI-Prolog.h>
#define MAXLINE 1024
int
main(int argc, char **argv)
{ char expression[MAXLINE];
char *e = expression;
char *program = argv[0];
char *plav[2];
int n;
/* combine all the arguments in a single string */
for(n=1; n<argc; n++)
{ if ( n != 1 )
*e++ = ' ';
strcpy(e, argv[n]);
e += strlen(e);
}
/* make the argument vector for Prolog */
plav[0] = program;
plav[1] = NULL;
/* initialise Prolog */
if ( !PL_initialise(1, plav) )
PL_halt(1);
/* Lookup calc/1 and make the arguments and call */
{ predicate_t pred = PL_predicate("calc", 1, "user");
term_t h0 = PL_new_term_refs(1);
int rval;
PL_put_atom_chars(h0, expression);
rval = PL_call_predicate(NULL, PL_Q_NORMAL, pred, h0);
PL_halt(rval ? 0 : 1);
}
return 0;
}
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