如何总结序言中谓词的多个结果? [英] How to sum multiple results from a predicate in prolog?

问题描述

所以我有一个谓词有时会返回多个数值结果，例如.

So I have a predicate that sometimes returns more than one numerical result, eg.

X=3;

X=1

如何将多个返回值相加?有时我的谓词返回一个单一的数值，这很好，但如果它返回多个，我希望它将多个结果相加并输出，而不是单独列出它们.

How can I sum multiple return values together? On occasion my predicate returns a single numerical value which is fine but if it returns more than one I want it to sum the multiple results together and output that rather than listing them separately.

谢谢.

推荐答案

您没有向我们展示代码，所以我无法确切说出正确的解决方案，但您可以尝试使用 findall/3 或 bagof/3 谓词收集列表中的结果，然后将它们相加.

You didnt show us code so i cant tell exactly what is correct solution, but you can try with findall/3 or bagof/3 predicates to collect results in list and then sum them all.

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