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FIXED: likes.cpp sample code #51

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Aug 19, 2023
Merged

FIXED: likes.cpp sample code #51

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32 changes: 15 additions & 17 deletions likes.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,10 @@
This example code is in the public domain
*/

#include "SWI-cpp2.h"
#include <iostream>
#include <SWI-cpp2.h>
#include <SWI-cpp2.cpp>

using namespace std;

/* Usage:
Expand All @@ -28,25 +30,19 @@ body(int argc, char **argv)
cout << "Happy people:" << endl;
PlQuery q("happy", av);
while( q.next_solution() )
cout << "\t" << (char *)av[0] << endl;
cout << "\t" << av[0].as_string() << endl;
} else
{ PlTermv av(2);

{ PlTerm_var whom;
PlQuery q("likes", PlTermv(PlTerm_atom(argv[0]), whom));
cout << argv[0] << " likes:" << endl;
av[0] = argv[0];
PlQuery q("likes", av);
while( q.next_solution() )
cout << "\t" << (char *)av[1] << endl;
cout << "\t" << whom.as_string() << endl;
}
} else if ( argc == 2 )
{ PlTermv av(2);

av[0] = argv[0];
av[1] = argv[1];
if ( PlCall("likes", av) )
cout << "yes" << endl;
else
cout << "no" << endl;
{ bool likes = PlCall("likes",
PlTermv(PlTerm_atom(argv[0]), PlTerm_atom(argv[1])));

cout << (likes ? "yes" : "no") << endl;
} else
cout << "Usage: likes x [y] or likes -happy" << endl;

Expand All @@ -60,10 +56,12 @@ main(int argc, char **argv)

try
{ return body(argc-1, argv+1);
} catch ( PlException &ex )
{ cerr << (char *) ex << endl;
} catch ( const PlExceptionBase &ex )
{ cerr << "Exception thrown: " << ex.what() << endl;
exit(1);
}

return 0;
}