using System; 
using System.Drawing; 
using System.Collections; 
using System.ComponentModel; 
using System.Windows.Forms; 
using System.Data; 

namespace Saving 
{ 
enum Compound 
{ 
每月計算利息, 
每季度計算利息 
} 
/// <summary> 
/// Form1 的摘要說明。 
/// </summary> 
public class Form1 : System.Windows.Forms.Form 
{ 
private System.Windows.Forms.Label label1; 
private System.Windows.Forms.NumericUpDown 初始金額; 
private System.Windows.Forms.Label label2; 
private System.Windows.Forms.NumericUpDown 利率; 
private System.Windows.Forms.Label label3; 
private System.Windows.Forms.Label label4; 
private System.Windows.Forms.ComboBox 計算規則; 
private System.Windows.Forms.Label label5; 
private System.Windows.Forms.Label label6; 
private System.Windows.Forms.Button 計算; 
private System.Windows.Forms.NumericUpDown 存期; 
private System.Windows.Forms.NumericUpDown 每月存入; 
private System.Windows.Forms.NumericUpDown 存款總額; 
/// <summary> 
/// 必需的設計器變量。 
/// </summary> 
private System.ComponentModel.Container components = null; 

public Form1() 
{ 
// 
// Windows 窗體設計器支持所必需的 
// 
InitializeComponent(); 

// 
// TODO: 在 InitializeComponent 調用后添加任何構造函數代碼 
// 
計算規則.Items.Add(Compound.每月計算利息); 
計算規則.Items.Add(Compound.每季度計算利息); 
計算規則.SelectedItem = 計算規則.Items[0]; 
} 

/// <summary> 
/// 清理所有正在使用的資源。 
/// </summary> 
protected override void Dispose( bool disposing ) 
{ 
if( disposing ) 
{ 
if (components != null) 
{ 
components.Dispose(); 
} 
} 
base.Dispose( disposing ); 
} 

#region Windows 窗體設計器生成的代碼 
/// <summary> 
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改 
/// 此方法的內容。 
/// </summary> 
private void InitializeComponent() 
{ 
this.label1 = new System.Windows.Forms.Label(); 
this.初始金額 = new System.Windows.Forms.NumericUpDown(); 
this.label2 = new System.Windows.Forms.Label(); 
this.利率 = new System.Windows.Forms.NumericUpDown(); 
this.label3 = new System.Windows.Forms.Label(); 
this.存期 = new System.Windows.Forms.NumericUpDown(); 
this.label4 = new System.Windows.Forms.Label(); 
this.計算規則 = new System.Windows.Forms.ComboBox(); 
this.label5 = new System.Windows.Forms.Label(); 
this.每月存入 = new System.Windows.Forms.NumericUpDown(); 
this.label6 = new System.Windows.Forms.Label(); 
this.存款總額 = new System.Windows.Forms.NumericUpDown(); 
this.計算 = new System.Windows.Forms.Button(); 
((System.ComponentModel.ISupportInitialize)(this.初始金額)).BeginInit(); 
((System.ComponentModel.ISupportInitialize)(this.利率)).BeginInit(); 
((System.ComponentModel.ISupportInitialize)(this.存期)).BeginInit(); 
((System.ComponentModel.ISupportInitialize)(this.每月存入)).BeginInit(); 
((System.ComponentModel.ISupportInitialize)(this.存款總額)).BeginInit(); 
this.SuspendLayout(); 
// 
// label1 
// 
this.label1.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label1.Location = new System.Drawing.Point(32, 32); 
this.label1.Name = "label1"; 
this.label1.Size = new System.Drawing.Size(88, 16); 
this.label1.TabIndex = 0; 
this.label1.Text = "初始金額："; 
// 
// 初始金額 
// 
this.初始金額.DecimalPlaces = 2; 
this.初始金額.Increment = new System.Decimal(new int[] { 
100, 
0, 
0, 
0}); 
this.初始金額.Location = new System.Drawing.Point(112, 32); 
this.初始金額.Maximum = new System.Decimal(new int[] { 
-1156317184, 
46566128, 
0, 
0}); 
this.初始金額.Name = "初始金額"; 
this.初始金額.Size = new System.Drawing.Size(168, 21); 
this.初始金額.TabIndex = 1; 
this.初始金額.ThousandsSeparator = true; 
this.初始金額.Value = new System.Decimal(new int[] { 
1000, 
0, 
0, 
0}); 
// 
// label2 
// 
this.label2.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label2.Location = new System.Drawing.Point(32, 72); 
this.label2.Name = "label2"; 
this.label2.Size = new System.Drawing.Size(88, 16); 
this.label2.TabIndex = 0; 
this.label2.Text = "利率(%)："; 
// 
// 利率 
// 
this.利率.DecimalPlaces = 2; 
this.利率.Increment = new System.Decimal(new int[] { 
1, 
0, 
0, 
65536}); 
this.利率.Location = new System.Drawing.Point(112, 72); 
this.利率.Name = "利率"; 
this.利率.Size = new System.Drawing.Size(168, 21); 
this.利率.TabIndex = 1; 
this.利率.ThousandsSeparator = true; 
this.利率.Value = new System.Decimal(new int[] { 
20, 
0, 
0, 
65536}); 
// 
// label3 
// 
this.label3.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label3.Location = new System.Drawing.Point(32, 112); 
this.label3.Name = "label3"; 
this.label3.Size = new System.Drawing.Size(88, 16); 
this.label3.TabIndex = 0; 
this.label3.Text = "存期(年)："; 
// 
// 存期 
// 
this.存期.Location = new System.Drawing.Point(112, 112); 
this.存期.Name = "存期"; 
this.存期.Size = new System.Drawing.Size(168, 21); 
this.存期.TabIndex = 1; 
this.存期.ThousandsSeparator = true; 
this.存期.Value = new System.Decimal(new int[] { 
5, 
0, 
0, 
0}); 
// 
// label4 
// 
this.label4.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label4.Location = new System.Drawing.Point(32, 152); 
this.label4.Name = "label4"; 
this.label4.Size = new System.Drawing.Size(88, 16); 
this.label4.TabIndex = 0; 
this.label4.Text = "計算規則："; 
// 
// 計算規則 
// 
this.計算規則.Location = new System.Drawing.Point(112, 152); 
this.計算規則.MaxDropDownItems = 2; 
this.計算規則.Name = "計算規則"; 
this.計算規則.Size = new System.Drawing.Size(168, 20); 
this.計算規則.TabIndex = 2; 
// 
// label5 
// 
this.label5.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label5.Location = new System.Drawing.Point(32, 192); 
this.label5.Name = "label5"; 
this.label5.Size = new System.Drawing.Size(88, 16); 
this.label5.TabIndex = 0; 
this.label5.Text = "每月存入："; 
// 
// 每月存入 
// 
this.每月存入.DecimalPlaces = 2; 
this.每月存入.Location = new System.Drawing.Point(112, 192); 
this.每月存入.Maximum = new System.Decimal(new int[] { 
-1156317184, 
46566128, 
0, 
0}); 
this.每月存入.Name = "每月存入"; 
this.每月存入.Size = new System.Drawing.Size(168, 21); 
this.每月存入.TabIndex = 1; 
this.每月存入.ThousandsSeparator = true; 
// 
// label6 
// 
this.label6.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134))); 
this.label6.Location = new System.Drawing.Point(32, 264); 
this.label6.Name = "label6"; 
this.label6.Size = new System.Drawing.Size(88, 16); 
this.label6.TabIndex = 0; 
this.label6.Text = "存款總額："; 
// 
// 存款總額 
// 
this.存款總額.DecimalPlaces = 2; 
this.存款總額.Increment = new System.Decimal(new int[] { 
100, 
0, 
0, 
0}); 
this.存款總額.Location = new System.Drawing.Point(112, 264); 
this.存款總額.Maximum = new System.Decimal(new int[] { 
-1156317184, 
46566128, 
0, 
0}); 
this.存款總額.Name = "存款總額"; 
this.存款總額.ReadOnly = true; 
this.存款總額.Size = new System.Drawing.Size(168, 21); 
this.存款總額.TabIndex = 1; 
this.存款總額.ThousandsSeparator = true; 
// 
// 計算 
// 
this.計算.Location = new System.Drawing.Point(248, 320); 
this.計算.Name = "計算"; 
this.計算.TabIndex = 3; 
this.計算.Text = "計算存款"; 
this.計算.Click += new System.EventHandler(this.計算_Click); 
// 
// Form1 
// 
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); 
this.ClientSize = new System.Drawing.Size(360, 373); 
this.Controls.Add(this.計算); 
this.Controls.Add(this.存款總額); 
this.Controls.Add(this.每月存入); 
this.Controls.Add(this.計算規則); 
this.Controls.Add(this.存期); 
this.Controls.Add(this.利率); 
this.Controls.Add(this.初始金額); 
this.Controls.Add(this.label1); 
this.Controls.Add(this.label2); 
this.Controls.Add(this.label3); 
this.Controls.Add(this.label4); 
this.Controls.Add(this.label5); 
this.Controls.Add(this.label6); 
this.Name = "Form1"; 
this.Text = "儲蓄利率計算器"; 
((System.ComponentModel.ISupportInitialize)(this.初始金額)).EndInit(); 
((System.ComponentModel.ISupportInitialize)(this.利率)).EndInit(); 
((System.ComponentModel.ISupportInitialize)(this.存期)).EndInit(); 
((System.ComponentModel.ISupportInitialize)(this.每月存入)).EndInit(); 
((System.ComponentModel.ISupportInitialize)(this.存款總額)).EndInit(); 
this.ResumeLayout(false); 

} 
#endregion 

/// <summary> 
/// 應用程序的主入口點。 
/// </summary> 
[STAThread] 
static void Main() 
{ 
Application.Run(new Form1()); 
} 

private void 計算_Click(object sender, System.EventArgs e) 
{ 
double startAmount=(double)初始金額.Value; 
double rate=(double)利率.Value; 
int years=(int)存期.Value; 
Compound calcFrequency=(Compound) 計算規則.SelectedItem; 
double additional=(double)每月存入.Value; 

decimal totalValue=0; 
rate=rate/100; 

int months=12*years; 

switch (calcFrequency) 
{ 
case Compound.每月計算利息: 
double monthlyRate=rate/12; 
for (int i=1; i<=months; i++) 
{ 
startAmount+=startAmount*monthlyRate; 
startAmount+=additional; 
} 
break; 
case Compound.每季度計算利息: 
double quarterlyRate=rate/4; 
for (int i=1; i<=months; i++) 
{ 
if (i%3==0) 
{ 
startAmount+=startAmount*quarterlyRate; 
} 
startAmount+=additional; 
} 
break; 
default: 
MessageBox.Show("該項工作尚未實現!"); 
break; 
} 
totalValue=(decimal)startAmount; 
存款總額.Value=totalValue; 
} 
} 
}