usingSystem；usingSystem.Collections.Generic；usingSystem.Drawing；usingSystem.Windows.Forms；namespacewindshadow14publicpartialclassMainForminti=0；inta；intb；inti1；longc；publicstaticvoidMain(stringargs)Application.EnableVisualStyles()；Application.SetCompatibleTextRenderingDefault(false)；Application.Run(newMainForm()；publicMainForm()InitializeComponent()；voidButton10Click(objectsender,System.EventArgse)if(textBox1.Text=)textBox1.Text=textBox1.Text+0；voidButton1Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+1；if(textBox1.Text=)textBox1.Text=textBox1.Text+1；voidButton2Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+2；if(textBox1.Text=)textBox1.Text=textBox1.Text+2；voidButton3Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+3；if(textBox1.Text=)textBox1.Text=textBox1.Text+3；voidButton4Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+4；if(textBox1.Text=)textBox1.Text=textBox1.Text+4；voidButton5Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+5；if(textBox1.Text=)textBox1.Text=textBox1.Text+5；voidButton6Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+6；if(textBox1.Text=)textBox1.Text=textBox1.Text+6；voidButton7Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+7；if(textBox1.Text=)textBox1.Text=textBox1.Text+7；voidButton8Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+8；if(textBox1.Text=)textBox1.Text=textBox1.Text+8；voidButton9Click(objectsender,System.EventArgse)textBox1.Text=textBox1.Text+9；if(textBox1.Text=)textBox1.Text=textBox1.Text+9；voidTextBox1TextChanged(objectsender,System.EventArgse)if(i=1|i=2|i=3|i=4)textBox1.Text=；i=0；voidButton12Click(objectsender,System.EventArgse)i=1；a=int.Parse(textBox1.Text)；i1=1；voidButton16Click(objectsender,System.EventArgse)b=int.Parse(textBox1.Text)；textBox1.Text=；switch(i1)case1:c=a+b；break；case2:c=a-b；break；case3:c=a*b；break；case4:c=a/b；break；textBox1.Text=c.ToString()；i=0；a=0；b=0；i1=0；voidButton13Click(objectsender,System.EventArgse)i1=2；i=1；a=int.Parse(textBox1.Text)；voidMainFormLoad(objectsender,System.EventArgse)voidButton14Click(objectsender,System.EventArgse)i1=3；i=3；a=int.Parse(textBox1.Text)；voidButton15Click(objectsender,System.EventArgse)i1=4；i=4；a=int.Parse(textBox1.Text)；還可以這樣編usingSystem；usingSystem.Collections.Generic；usingSystem.ComponentModel；usingSystem.Data；usingSystem.Drawing；usingSystem.Text；usingSystem.Windows.Forms；namespacewindshadowpublicpartialclassForm1:Forminta；intb；intc；intb1；publicForm1()InitializeComponent()；privatevoidbutton1_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+1；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+1；b=0；privatevoidbutton2_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+2；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+2；b=0；privatevoidbutton3_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+3；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+3；b=0；privatevoidbutton4_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+4；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+4；b=0；privatevoidbutton5_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+5；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+5；b=0；privatevoidbutton6_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+6；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+6；b=0；privatevoidbutton7_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+7；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+7；b=0；privatevoidbutton8_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+8；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+8；b=0；privatevoidbutton9_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+9；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+9；b=0；privatevoidbutton11_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+0；if(b=1)textBox1.Text=；textBox1.Text=textBox1.Text+0；b=0；privatevoidbutton10_Click(objectsender,EventArgse)textBox1.Text=textBox1.Text+.；privatevoidbutton13_Click(objectsender,EventArgse)a=int.Pars