广东
Hacker News 上的昨日热帖，求 9999999999999999.0 – 9999999999999998.0，哪种编程语言的浮点计算能给出正确答案？
Ruby: irb(main):001:0> 9999999999999999.0 - 9999999999999998.0
2.0 Java: public class Foo{public static void main(String args[]){System.out.println(9999999999999999.0-9999999999999998.0);}}
2.0 Python: >>> 9999999999999999.0 - 9999999999999998.0
2.0 Rebol: >> 9999999999999999.0 - 9999999999999998.0
== 2.0 Haskell: Prelude> 9999999999999999.0 - 9999999999999998.0
2.0 TCL: % expr "9999999999999999.0-9999999999999998.0"
0.0 Emacs Lisp: ELISP> (- 9999999999999999.0 9999999999999998.0)
2.0 Common–Lisp: [1]> (- 9999999999999999.0 9999999999999998.0)
0.0 Maxima: (%i1) 9999999999999999.0-9999999999999998.0;
(%o1) 2.0 Google: 0 K/Q: q)9999999999999999.0-9999999999999998.0
2f R: > 9999999999999999.0-9999999999999998.0
[1] 2 Erlang: 1> 9999999999999999.0-9999999999999998.0 .
2.0 C: main(){printf("%lf\n",(double)9999999999999999.0-9999999999999998.0);}
2.000000 AWK: $ awk 'END{print 9999999999999999.0-9999999999999998.0}'2 GoLang: var a = 9999999999999999.0; var b = 9999999999999998.0; fmt.Printf("%f\n", a-b)
2.000000 Perl: $ perl -e 'print 9999999999999999.0-9999999999999998.0;print "\n";'
2.0 Perl6: $ perl6 -e 'print 9999999999999999.0-9999999999999998.0;print "\n";'
1 Wolfram: 1 soup: 9999999999999999.0-9999999999999998.0
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最后看看 ChatGPT 的回答：
来源： https://geocar.sdf1.org/numbers.html
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