ISO Pascal reference manual

END.
thing(x); [x is not an integer variable}
*ERROR 117 -- the parameters required by are different from
those specified in the definition of this parameter
This message is issued when an attempt is made to pass a procedure or
function as a parameter to another procedure or function, < name > , and
the parameters required by the actual parameter do not match those
required by the formal parameters of the parameter of < name > . Note that
the standard is very strict about the matching.
PROGRAM faiL(output);
PROCEDURE actual1(x : integer; y : integer); BEGIN
writeln('actual1');
END;
PROCEDURE actual2(x, y : integer); BEGIN
(NOTE - these parameters are DIFFERENT from actual1's}
writeln('actual2');
END;
PROCEDURE actual3(w : real); BEGIN
writeln('actual3');
END;
PROCEDURE try(a : integer;
PROCEDURE formal(p, q : integer);
c : integer);
BEGIN
formal(a, c);
END;
BEGIN
try(1, actual1, 3); (strictly wrong}
try(1, actual?, 3); (right}
try(1, actual3, 3); (wrong}
END.
86 Pascal Issue I