Visual Prolog is a multi paradigm programming language based on the logical language Prolog. The goal of Visual Prolog is to facilitate programmatic solutions of complex knowledge emphasized problems. With Visual Prolog you can build applications for the Microsoft Windows 32/64 platforms. It supports advanced client-server and three-tier solutions. Visual Prolog is especially well suited for dealing with complex knowledge.
predicates run(char) goal run(X). clauses run(X) :- makewindow(1, 7, 7, " Hello World Program ", 0, 0, 25, 80), write("Hello World (first)"), readchar(X), removewindow. run(X) :- write("hello World (second)"), readchar(X).