Prolog，在开始执行时写一些东西

Question

我想在用户执行时在终端上显示一个字符串。但是，我想在不调用任何谓词的情况下执行此操作。例如，如果代码是这样的:

print_sth(String):-write(String).

只有当我显式调用该谓词时，它才会打印一些字符串。相反，当我们查询我们的程序时，我希望 View 是这样的:

This is a brief tutorial of the program that was called automatically. 
?- // Ready to call a predicate here, but the string above was displayed when we consulted the program.  

我试过了，但没用:

:- write('This is a brief tutorial of the program that was called automatically. ').
some_predicate():- do_sth().
// ... other stuff follows here.

谢谢!

Answer 1

:- initialization (writeln('hello world')).