'''
using System;
using System.Linq;
using System.Windows.Forms;
namespace calculator_app
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
this.MaximizeBox = false; // タイトルバーの最大化の削除 todo:プロパティにないかな
this.MinimizeBox = false; // タイトルバーの最小化の削除
}
/// --------------------------------------
/// グローバル変数
/// --------------------------------------
private bool isNewInput = true; // 新しい数字の入力の場合のフラグ
private int maxDigits = 20; // 最大桁数
private decimal? left = null; // 左辺
private decimal? right = null; // 右辺
private decimal memory = 0m; // メモリ
private enum ErrorCode
{
None,
OverFlow,
DivideByZero,
}
private enum Operator
{
Plus,
Minus,
Times,
Divide,
Equal
}
///
/// 数字ボタンクリック時の処理
///
///
private void NumberButtonClick(string num)
{
// 桁数チェック
if (!IsDigitLengthWithinLimit())
{
return;
}
if (isNewInput)
{ // 一番最初に数字が押された時
if (mainTxtBox.Text == "0")
{
mainTxtBox.Text = num;
}
else if (mainTxtBox.Text == "00")
{
mainTxtBox.Text = "0";
}
else
{
mainTxtBox.Text += num;
}
}
else
{ // すでにボタンが押され、文字列結合する
mainTxtBox.Text = num;
isNewInput = false;
}
decimal displayNum = ParseDisplay();
// 3桁区切り
mainTxtBox.Text = FormatWithComma(displayNum);
}
///
/// 演算子ボタンクリック字の処理
///
/// 演算子
private void OperationButtonClick(Operator ope)
{
isNewInput = true; // 新しく入力を受け付けれるようにする
decimal mainTxt = ParseDisplay();
if (testLabel.Text != "")
{
// 計算を行う
right = mainTxt;
ErrorCode errorCode = ExecuteOperation();
if (errorCode == ErrorCode.DivideByZero)
{
Error(errorCode);
return;
}
mainTxtBox.Text = FormatWithComma((decimal)left);
}
else
{
// まだ計算はしない
left = mainTxt;
}
testLabel.Text = left.ToString() + " " + OperatorToSymbol(ope);
mainTxtBox.Text = "0";
}
///
/// 四則演算処理
/// left 演算子 rghtの結果をleftに入れる
///
///
private ErrorCode ExecuteOperation()
{
if (testLabel.Text.Contains("+"))
{
left += right;
}
else if (testLabel.Text.Contains("-"))
{
left -= right;
}
else if (testLabel.Text.Contains("×"))
{
left *= right;
}
else if (testLabel.Text.Contains("÷"))
{
if (right == 0m)
return ErrorCode.DivideByZero;
left /= right;
}
else
{
left = right;
}
return ErrorCode.None;
}
///
/// 3桁区切りにする処理
///
private string FormatWithComma(decimal value)
{
if (value % 1 == 0)
return value.ToString("#,0");
else
return value.ToString("#,0.####################");
}
///
/// 最大桁数を超えているか
///
/// 最大桁数越え：false, 最大桁数以内：true
private bool IsDigitLengthWithinLimit()
{
string[] charDelete = new string[] { ",", ".", "-" };
string txtBox = mainTxtBox.Text;
// 記号などの文字列を除く
foreach (var c in charDelete)
{
txtBox = txtBox.Replace(c, "");
}
if (maxDigits <= txtBox.Length)
{
// 桁数あふれ
return false;
}
else
{
return true;
}
}
///
/// 表示→decimal変換（カンマ除去）
///
///
private decimal ParseDisplay()
{
return decimal.Parse(mainTxtBox.Text.Replace(",", ""));
}
///
/// 演算子のenumからその演算子記号を返す
///
///
///
private string OperatorToSymbol(Operator ope)
{
switch (ope)
{
case Operator.Plus: return "+";
case Operator.Minus: return "-";
case Operator.Times: return "×";
case Operator.Divide: return "÷";
default: return "";
}
}
///
/// エラーが起こった時の処理
///
///
private void Error(ErrorCode code)
{
switch (code)
{
case ErrorCode.DivideByZero:
mainTxtBox.Text = "ゼロ除算エラー";
break;
case ErrorCode.OverFlow:
mainTxtBox.Text = "桁数エラー(演算結果の整数桁が大きすぎ)";
break;
default:
break;
}
includeTaxBtn.Enabled =
excludeTaxBtn.Enabled =
mClearBtn.Enabled =
changeWarekiBtn.Enabled =
mPlusBtn.Enabled =
mMinusBtn.Enabled =
mRecallBtn.Enabled =
zeroBtn.Enabled =
zerozeroBtn.Enabled =
oneBtn.Enabled =
twoBtn.Enabled =
threeBtn.Enabled =
fourBtn.Enabled =
fiveBtn.Enabled =
sixBtn.Enabled =
sevenBtn.Enabled =
eightBtn.Enabled =
nineBtn.Enabled =
pointBtn.Enabled =
plusAndMinusBtn.Enabled =
timesBtn.Enabled =
plusBtn.Enabled =
divideBtn.Enabled =
minusBtn.Enabled =
equalBtn.Enabled = false;
}
///
/// エラー後のボタン復活処理
///
private void ResetButton()
{
includeTaxBtn.Enabled =
excludeTaxBtn.Enabled =
mClearBtn.Enabled =
changeWarekiBtn.Enabled =
mPlusBtn.Enabled =
mMinusBtn.Enabled =
mRecallBtn.Enabled =
zeroBtn.Enabled =
zerozeroBtn.Enabled =
oneBtn.Enabled =
twoBtn.Enabled =
threeBtn.Enabled =
fourBtn.Enabled =
fiveBtn.Enabled =
sixBtn.Enabled =
sevenBtn.Enabled =
eightBtn.Enabled =
nineBtn.Enabled =
pointBtn.Enabled =
plusAndMinusBtn.Enabled =
timesBtn.Enabled =
plusBtn.Enabled =
divideBtn.Enabled =
minusBtn.Enabled =
equalBtn.Enabled = true;
}
#region イベントハンドラ
#region 数字のボタン
private void zeroBtn_Click(object sender, EventArgs e)
{
string num = "0";
NumberButtonClick(num);
}
private void zerozeroBtn_Click(object sender, EventArgs e)
{
string num = "00";
NumberButtonClick(num);
}
private void oneBtn_Click(object sender, EventArgs e)
{
string num = "1";
NumberButtonClick(num);
}
private void twoBtn_Click(object sender, EventArgs e)
{
string num = "2";
NumberButtonClick(num);
}
private void threeBtn_Click(object sender, EventArgs e)
{
string num = "3";
NumberButtonClick(num);
}
private void fourBtn_Click(object sender, EventArgs e)
{
string num = "4";
NumberButtonClick(num);
}
private void fiveBtn_Click(object sender, EventArgs e)
{
string num = "5";
NumberButtonClick(num);
}
private void sixBtn_Click(object sender, EventArgs e)
{
string num = "6";
NumberButtonClick(num);
}
private void sevenBtn_Click(object sender, EventArgs e)
{
string num = "7";
NumberButtonClick(num);
}
private void eightBtn_Click(object sender, EventArgs e)
{
string num = "8";
NumberButtonClick(num);
}
private void nineBtn_Click(object sender, EventArgs e)
{
string num = "9";
NumberButtonClick(num);
}
#endregion
#region クリア系
///
/// AC
///
///
///
private void allClearBtn_Click(object sender, EventArgs e)
{
mainTxtBox.Text = "0";
left = null;
right = null;
isNewInput = true;
testLabel.Text = "";
ResetButton();
}
///
/// C
///
///
///
private void clearBtn_Click(object sender, EventArgs e)
{
mainTxtBox.Text = "0";
ResetButton();
}
#endregion
#region 演算系
///
/// 足し算
///
///
///
private void plusBtn_Click(object sender, EventArgs e)
{
OperationButtonClick(Operator.Plus);
}
///
/// 引き算
///
///
///
private void minusBtn_Click(object sender, EventArgs e)
{
OperationButtonClick(Operator.Minus);
}
///
/// 掛け算
///
///
///
private void timesBtn_Click(object sender, EventArgs e)
{
OperationButtonClick(Operator.Times);
}
///
/// 割り算
///
///
///
private void divideBtn_Click(object sender, EventArgs e)
{
OperationButtonClick(Operator.Divide);
}
///
/// イコールボタンクリック時の処理
///
///
///
private void equalBtn_Click(object sender, EventArgs e)
{
right = ParseDisplay();
ErrorCode errorCode = ExecuteOperation();
if (errorCode == ErrorCode.DivideByZero)
{
Error(errorCode);
return;
}
mainTxtBox.Text = FormatWithComma((decimal)left);
right = null; // いらない気がする
testLabel.Text = "";
}
#endregion
#region メモリ関係
///
/// M+
///
///
///
private void mPlusBtn_Click(object sender, EventArgs e)
{
decimal mainTxt = ParseDisplay();
memory += mainTxt;
isNewInput = true;
mainTxtBox.Text = "0";
}
///
/// M-
///
///
///
private void mMinusBtn_Click(object sender, EventArgs e)
{
decimal mainTxt = ParseDisplay();
memory -= mainTxt;
isNewInput = true;
mainTxtBox.Text = "0";
}
///
/// MR
///
///
///
private void mRecallBtn_Click(object sender, EventArgs e)
{
mainTxtBox.Text = FormatWithComma((decimal)memory);
}
///
/// MC
///
///
///
private void mClearBtn_Click(object sender, EventArgs e)
{
memory = 0;
}
#endregion
#region 付加系
///
/// .
///
///
///
private void pointBtn_Click(object sender, EventArgs e)
{
bool hasPoint = mainTxtBox.Text.Contains('.');
if (hasPoint)
{
return;
}
mainTxtBox.Text += ".";
pointBtn.Enabled = true;
}
///
/// +/-
///
///
///
private void plusAndMinusBtn_Click(object sender, EventArgs e)
{
if (mainTxtBox.Text.StartsWith("-"))
{
mainTxtBox.Text = mainTxtBox.Text.Substring(1);
}
else
{
mainTxtBox.Text = "-" + mainTxtBox.Text;
}
}
#endregion
#region キーボードからの読み取り系
///
/// 数字のボタン
///
///
///
private void Calculator_KeyPress(object sender, KeyPressEventArgs e)
{
switch (e.KeyChar)
{
case (char)Keys.D0:
case (char)Keys.NumPad0:
zeroBtn.PerformClick();
break;
case (char)Keys.D1:
case (char)Keys.NumPad1:
oneBtn.PerformClick();
break;
case (char)Keys.D2:
case (char)Keys.NumPad2:
twoBtn.PerformClick();
break;
case (char)Keys.D3:
case (char)Keys.NumPad3:
threeBtn.PerformClick();
break;
case (char)Keys.D4:
case (char)Keys.NumPad4:
fourBtn.PerformClick();
break;
case (char)Keys.D5:
case (char)Keys.NumPad5:
fiveBtn.PerformClick();
break;
case (char)Keys.D6:
case (char)Keys.NumPad6:
sixBtn.PerformClick();
break;
case (char)Keys.D7:
case (char)Keys.NumPad7:
sevenBtn.PerformClick();
break;
case (char)Keys.D8:
case (char)Keys.NumPad8:
eightBtn.PerformClick();
break;
case (char)Keys.D9:
case (char)Keys.NumPad9:
nineBtn.PerformClick();
break;
default:
break;
}
}
///
/// 記号・演算子・Enterボタン
///
///
///
private void Calculator_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Oemplus || e.KeyCode == Keys.Add)
{
plusBtn.PerformClick();
}
else if (e.KeyCode == Keys.OemMinus || e.KeyCode == Keys.Subtract)
{
minusBtn.PerformClick();
}
else if (e.KeyCode == Keys.Multiply || (e.Shift && e.KeyCode == Keys.D8))
{
timesBtn.PerformClick();
}
else if (e.KeyCode == Keys.Divide || e.KeyCode == Keys.OemQuestion)
{
divideBtn.PerformClick();
}
else if (e.KeyCode == Keys.OemPeriod || e.KeyCode == Keys.Decimal)
{
pointBtn.PerformClick();
}
else if (e.KeyCode == Keys.Enter)
{
equalBtn.PerformClick();
}
}
#endregion
#region チェックボックス変更時系
///
///
///
///
///
private void changeTaxRateMode_CheckedChanged(object sender, EventArgs e)
{
if (changeTaxRateMode.Checked)
{
Console.WriteLine("チェックついたよ");
}
else
{
Console.WriteLine("チェックが外れたよ");
}
}
///
///
///
///
///
private void changeWarekiMode_CheckedChanged(object sender, EventArgs e)
{
}
#endregion
#endregion
}
}
'''