/// <summary>
/// 数字のみの数式を計算する
/// </summary>
/// <param name="f">計算式</param>
/// <returns>計算結果</returns>
public static async Task <double> SolveNumFormula(string f)
{
f = LaTeXtoFormula(f);
//monos:単項式ごとに分けられたもの
var monos = OperateBrackets.FindMonomials(f).ToList();
monos.Remove("");
var resmonos = new double[0];
resmonos = await monos.Select(async (mono) =>
{
if (double.TryParse(mono, out double num))//単項式が数字だけなら先に返してしまう
{
return(num);
}
else
{
//括弧に隣接する加減算記号を数字として扱う
mono = Regex.Replace(mono, "(\\+|\\-)\\(", "${1}1(");
mono = Regex.Replace(mono, "(\\+|\\-)\\#", "${1}1*#");
var bmap = OperateBrackets.MapingBrackets(mono);
//括弧が足りない場合は補完
if (bmap.Last() - bmap.First() > 0)
{
mono += new string(')', bmap.Last() - bmap.First());
bmap = bmap.ToList().Concat(Enumerable.Range(0, bmap.Last() - bmap.First()).Reverse()).ToArray();
}
//括弧が正常な時の処理
if (bmap.First() == bmap.Last())
{
//演算子で区切る(累乗以外)、括弧はそのまま残す
var splitted = OperateBrackets.SplitByOperators(mono);
//累乗を計算する
while (splitted.Any(x => x.First() == '^'))
{
var n = splitted.LastOrDefault(x => x.First() == '^');
int index = splitted.LastIndexOf(n);
if (index > 0)
{
string pastn = splitted[index - 1];
double pastfigure = 1;
double nowfigure = 1;
char opera = '*';
if (pastn.First() == '*' ||
pastn.First() == '/' ||
pastn.First() == '^')
{
opera = pastn.First();
if (!double.TryParse(pastn.Substring(1), out pastfigure))
{
pastfigure = await SolveNumFormula(pastn.Substring(2, pastn.Length - 3));
}
if (!double.TryParse(n.Substring(1), out nowfigure))
{
nowfigure = await SolveNumFormula(n.Substring(2, n.Length - 3));
}
}
else
{
if (!double.TryParse(pastn, out pastfigure))
{
pastfigure = await SolveNumFormula(pastn.Substring(1, pastn.Length - 2));
}
if (!double.TryParse(n.Substring(1), out nowfigure))
{
nowfigure = await SolveNumFormula(n.Substring(2, n.Length - 3));
}
}
splitted.RemoveAt(index);
splitted.RemoveAt(index - 1);
splitted.Insert(index - 1, opera + Math.Pow(pastfigure, nowfigure).ToString());
}
else
{
throw new Exception("累乗でのエラー");
}
}
List <double> Numres = new List <double> {
};
//各項を処理する
foreach (string r in splitted)
{
string s = r;
//最初に"*"がついていたら消す
if (s.First() == '*')
{
s = s.Substring(1);
}
bool IsInverse = false;
if (s.First() == '/')
{
IsInverse = true;
//最初の"/"を消す
s = s.Substring(1);
}
if (s.First() == '#')//関数がある時
{
string funkname = Regex.Replace(s, "^#\\$(([a-z|A-Z]|π)*)\\$#.*", "$1");
string inBracket = Regex.Replace(s, "^#\\$([a-z|A-Z]|π)*\\$#\\((.*)\\)$", "$2");
int[] inbracketmap = OperateBrackets.MapingBrackets(inBracket);
string CommaedinBracket = inBracket;
int lug = 0;
for (int i = 0; i < inBracket.Length; i++)
{
if (inBracket[i] == ',' && inbracketmap[i] == 0)
{
CommaedinBracket = CommaedinBracket.Insert(i + lug++, ",");
}
}
List <double> inBracketValues = (await CommaedinBracket.Split(new string[1] {
",,"
}, StringSplitOptions.None)
.Select(async(x) => await SolveNumFormula(x))
.WhenAll()).ToList();
if (IsInverse)
{
Numres.Add(1 / await FuncItemService.RunFunc(inBracketValues, funkname));
}
else
{
Numres.Add(await FuncItemService.RunFunc(inBracketValues, funkname));
}
}
else if (s.First() == '(')//括弧に囲まれたものの時
{
if (IsInverse)
{
Numres.Add(1 / await SolveNumFormula(s.Substring(1, s.Length - 2)));
}
else
{
Numres.Add(await SolveNumFormula(s.Substring(1, s.Length - 2)));
}
}
else//数字のみの時
{
if (IsInverse)
{
Numres.Add(1 / double.Parse(s));
}
else
{
Numres.Add(double.Parse(s));
}
}
}
return(Numres.Aggregate((now, next) => now *next));
}
else
{
throw new Exception(AppResources.BracketsWrong);
}
}
}).WhenAll();
return(resmonos.Sum());
}
public async Task OnNavigatedTo(INavigationParameters parameters)
{
FuncItems = await FuncItemService.GetList();
}
/// <summary>
/// 数式の指定された部分に指定された文字を追加する
/// </summary>
/// <param name="nowformula"></param>
/// <param name="figure"></param>
/// <param name="locate"></param>
/// <returns></returns>
public async static Task <(string, int)> AddfigureManipulation(string nowformula, string figure, int locate)
{
string NowFormula = nowformula;
//一つ前と二つ前の文字を抽出する
//存在しなかった場合は""となる
string PastChar = "";
string PastPastChar = "";
try
{
PastChar = NowFormula.Last().ToString();
PastPastChar = NowFormula.Substring(NowFormula.Length - 2, 1);
}
catch { }
if (figure == "/")//割り算が押された場合は分数を挿入する
{
if (NowFormula == "" || PastChar == "{" || PastChar == "(")
{
NowFormula += "~frac{}{}";
locate++;
}
else
{
int back = 0;
for (int i = NowFormula.Length - 1; i >= 0; i--)
{
if (Regex.IsMatch(NowFormula[i].ToString(), "^(\\+|\\-|\\*|/|\\(|\\{)$"))
{
back = i + 1;
break;
}
else if (NowFormula[i] == ')')
{
var locates = OperateBrackets.LocationofInsideofBracket(NowFormula, i);
i = locates.Item1;
if (i != 0 && NowFormula[i - 1] == '#')
{
for (int j = i - 2; j >= 0; j--)
{
if (NowFormula[j] == '#')
{
i = j;
break;
}
}
}
}
else if (NowFormula[i] == '}')
{
var locates = OperateBrackets.LocationofInsideofBracket(NowFormula, i, "{}");
i = locates.Item1;
}
}
var Numor = NowFormula.Substring(back);
if (NowFormula != "" && NowFormula.Length > back)
{
NowFormula = NowFormula.Remove(back);
}
NowFormula = NowFormula + "~frac{" + Numor + "}{}";
locate += 2;
}
}
else if (figure == "root")
{
NowFormula += "~root{2}{}";
locate += 3;
}
else if (figure == "^")
{
if (!Regex.IsMatch(PastChar, "^(\\+|\\-|\\*|/|\\^|\\(|\\{)$"))
{
NowFormula += "^{}";
locate += 1;
}
}
else if (PastChar == "-" && //前が-
Regex.IsMatch(PastPastChar, "^(\\*|/|\\^|\\()$") &&//前の前が*,/,^,(
Regex.IsMatch(figure, "^(\\+|\\-|\\*|/|\\^|\\))$"))//今のが+,-,*,/,^,)
{
switch (figure)
{
case "+":
(NowFormula, locate) = BackSpace(NowFormula, locate);
break;
case "-":
(NowFormula, locate) = BackSpace(NowFormula, locate);
NowFormula += figure;
break;
case "*":
case "/":
case "^":
(NowFormula, locate) = BackSpace(NowFormula, locate);
(NowFormula, locate) = BackSpace(NowFormula, locate);
NowFormula += figure;
break;
case ")":
(NowFormula, locate) = BackSpace(NowFormula, locate);
(NowFormula, locate) = BackSpace(NowFormula, locate);
break;
default:
Trace.WriteLine("内部エラー");
break;
}
locate++;
}
else if (Regex.IsMatch(PastChar, "^(\\+|\\-)$") &&//前が+,-
Regex.IsMatch(figure, "^(\\+|\\-|\\*|/|\\^|\\))$"))//今のが+,-,*,/,^,)
{
(NowFormula, locate) = BackSpace(NowFormula, locate);
NowFormula += figure;
locate++;
}
else if (Regex.IsMatch(PastChar, "^(\\*|/|\\^|\\()$") &&//前が*,/,^,(
Regex.IsMatch(figure, "^(\\+|\\*|/|\\^|\\))$"))//今のが+,*,/,^,)
{
(NowFormula, locate) = BackSpace(NowFormula, locate);
NowFormula += figure;
locate++;
}
else if (figure == "invert" && !Regex.IsMatch(PastChar, "^(\\+|\\-|\\*|/|\\^|\\()$"))//逆数ボタンを押した時
{
NowFormula += "^{-1}";
locate += 4;
}
else if (figure == "invert")
{
}
else if (figure.First() == '~')
{
if (await FuncItemService.IsExist(figure.Substring(1)))
{
var count = (await FuncItemService.GetByName(figure.Substring(1))).CharCount;
if (count == 0)
{
NowFormula += figure + "{}";
locate += 1;
}
else
{
NowFormula += figure + (new StringBuilder()).Insert(0, "{}", count).ToString();
}
}
locate += 1;
}
else if (figure == "." && PastChar == ".")//小数点
{
}
else
{
NowFormula += figure;
locate++;
}
return(NowFormula, locate);
}
private async Task ButtonClicked()
{
await FuncItemService.Add(DateTime.Now.ToShortDateString(), "Hello");
FuncItems = await FuncItemService.GetList();
}