创建网路表单来计算边际税率
在很多情况下，涉及纳税的计算太过复杂，难以有效地嵌入到单独的一个网络表单中. AskFunction 可使你以简单而直观的方式进行计算.
In[1]:=
CloudDeploy[AskFunction[Module[{bracket, tax, income},
bracket =
Ask[{"brackets",
"What is your marital status?"} -> {"Married filing jointly" \
-> {18550, 75300, 151900, 231450, 413350, 466950},
"Single" -> {9275, 37650, 91150, 190150, 413350, 415050},
"Head of household" -> {13250, 50400, 130150, 210800, 413350,
441000},
"Married filing separately" -> {9275, 37650, 75950, 115725,
206675, 233475}}];
income =
Ask[{"income", "What was your income in 2015"} ->
Restricted["Number", {0, Infinity}]];
tax = Integrate[
Piecewise[{{.10 , 0 <= x <= bracket[[1]]}, {.15,
bracket[[1]] < x <= bracket[[2]]}, {.25,
bracket[[2]] < x <= bracket[[3]]}, {.28,
bracket[[3]] < x <= bracket[[4]]}, {.33,
bracket[[4]] < x <= bracket[[5]]}, {.35,
bracket[[5]] < x <= bracket[[6]]}, {.396, True}}], {x, 0,
income -
If[Ask[{"deps",
"Do you have any dependents?"} -> {"Yes" -> True,
"No" -> False}],
Ask[{"nodeps", "How many?"} ->
Restricted["Integer", {0, Infinity}]]* 4050, 0]}];
AskTemplateDisplay[
Column[{"You owe $" <> ToString[tax] <> " in taxes.",
"Your marginal tax rate is " <>
ToString[Round[100.*tax/#income, 0.1]] <> "%",
PieChart[{tax, income}]}] &]
]]]Out[1]=
从本例中可以看到，你可以使用自己喜欢的编程风格，包括 Module 的应用以及对计算状态的存储. 此外，AskFunction 会跳过不需要的问题. 可以自己尝试一下.
