Shape3D.cs為基礎類別
Ball.cs、Cube.cs、Cylinder.cs、Pyramid.cs為衍生類別
Constant.cs為紀錄運算需要用到的常數，例如pi
Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace homework7
{
public partial class Form1 : Form
{
private Shape3D[] shapeArr = new Shape3D[100];
private static double[] densityArr = { 2.7, 7.87, 11.3 }; //density
public Form1() //initialize
{
InitializeComponent();
cboMaterial.SelectedIndex = 0;
cboShape.SelectedIndex = 0;
txtNumbers.Text = Shape3D.Amount.ToString();
txtParameter1.Text = "0";
}
private void cboShape_SelectedIndexChanged(object sender, EventArgs e) //when shape chosen, show labels and text boxes
{
switch (cboShape.SelectedIndex)
{
case 0: //ball
lblParameter1.Text = "半徑";
lblParameter2.Visible = false;
txtParameter2.Visible = false;
break;
case 1: //cube
lblParameter1.Text = "邊長";
lblParameter2.Visible = false;
txtParameter2.Visible = false;
break;
case 2: //cylinder
lblParameter1.Text = "半徑";
lblParameter2.Text = "高";
lblParameter2.Visible = true;
txtParameter2.Visible = true;
break;
case 3: //pyramid
lblParameter1.Text = "邊長";
lblParameter2.Text = "高";
lblParameter2.Visible = true;
txtParameter2.Visible = true;
break;
default:
break;
}
}
private void btnInput_Click(object sender, EventArgs e) //new items
{
int amount = Shape3D.Amount;
double density = densityArr[cboMaterial.SelectedIndex]; //density of chosen material
switch (cboShape.SelectedIndex)
{
case 0: //ball
shapeArr[amount] = new Ball(double.Parse(txtParameter1.Text), density);
break;
case 1: //cube
shapeArr[amount] = new Cube(double.Parse(txtParameter1.Text), density);
break;
case 2: //cylinder
shapeArr[amount] = new Cylinder(double.Parse(txtParameter1.Text), double.Parse(txtParameter2.Text), density);
break;
case 3: //pyramid
shapeArr[amount] = new Pyramid(double.Parse(txtParameter1.Text), double.Parse(txtParameter2.Text), density);
break;
}
txtDetails.AppendText(shapeArr[amount].ShapeProperty() + Environment.NewLine); //show properties of shapes
txtNumbers.Text = Shape3D.Amount.ToString(); //show amount
}
private void btnCalculate_Click(object sender, EventArgs e) //calculate and show results
{
txtResults.Clear();
for (int i = 0; i < Shape3D.Amount; i++)
{
string display = (shapeArr[i].ShowResults() + Environment.NewLine);
txtResults.AppendText(display);
}
}
}
}
Shape3D.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Shape3D
{
protected double density; //fields
private static int _amount = 0;
public Shape3D() //constructors
{
density = 0;
_amount++;
}
public Shape3D(double d)
{
Density = d;
_amount++;
}
public double Density //attributes
{
get { return density; }
set
{
if (density < 0)
{
density = 0;
}
else
{
density = value;
}
}
}
public static int Amount
{
get { return _amount; }
}
public double Weight() //calculate weight
{
return Density * Volume();
}
public virtual double Volume() //virtual method
{
return 0;
}
public string ShowResults() //show results message, including properties of shapes, density, volume, and weight
{
string results = ShapeProperty();
results += '\t';
results += string.Format("{0,8:F2}", density);
results += '\t';
results += string.Format("{0,8:F2}", Volume());
results += '\t';
results += string.Format("{0,8:F2}", Weight());
return results;
}
public virtual string ShapeProperty() //virtual method
{
return "";
}
}
}
Ball.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Ball:Shape3D
{
private double _radius; //fields
public Ball(double _radius, double density) //constructors
:base(density)
{
Radius = _radius;
}
public double Radius //attributes
{
get { return _radius; }
set
{
if (_radius < 0)
{
_radius = 0;
}
else
{
_radius = value;
}
}
}
public override double Volume() //calculate volume
{
return 4.0 / 3 * Constant.pi * _radius * _radius * _radius;
}
public override string ShapeProperty() //show details of chosen shape, including shape and radius
{
string property = "Ball";
property += '\t';
property += string.Format("{0,8:F2}", _radius);
property += '\t';
property += "";
return property;
}
}
}
Cube.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Cube:Shape3D
{
private double _length; //fields
public Cube(double _length, double density) //constructors
:base(density)
{
Length = _length;
}
public double Length //attributes
{
get { return _length; }
set
{
if (_length < 0)
{
_length = 0;
}
else
{
_length = value;
}
}
}
public override double Volume() //calculate volume
{
return _length * _length * _length;
}
public override string ShapeProperty() //show details of chosen shape, including shape and length
{
string property = "Cube";
property += '\t';
property += string.Format("{0,8:F2}", _length);
property += '\t';
property += "";
return property;
}
}
}
Cylinder.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Cylinder:Shape3D
{
private double _radius; //fields
private double _height;
public Cylinder(double _radius, double _height, double density) //constructors
: base(density)
{
Radius = _radius;
Height = _height;
}
public double Radius //attributes
{
get { return _radius; }
set
{
if (_radius < 0)
{
_radius = 0;
}
else
{
_radius = value;
}
}
}
public double Height
{
get { return _height; }
set
{
if (_height < 0)
{
_height = 0;
}
else
{
_height = value;
}
}
}
public override double Volume() //calculate volume
{
return _radius * _radius * Constant.pi * _height;
}
public override string ShapeProperty() //show details of chosen shape, including shape, radius, and height
{
string property = "Cylinder";
property += '\t';
property += string.Format("{0,8:F2}", _radius);
property += '\t';
property += string.Format("{0,8:F2}", _height);
return property;
}
}
}
Pyramid.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Pyramid:Shape3D
{
private double _length; //fields
private double _height;
public Pyramid(double _length, double _height, double density) //constructors
: base(density)
{
Length = _length;
Height = _height;
}
public double Length //attributes
{
get { return _length; }
set
{
if (_length < 0)
{
_length = 0;
}
else
{
_length = value;
}
}
}
public double Height
{
get { return _height; }
set
{
if (_height < 0)
{
_height = 0;
}
else
{
_height = value;
}
}
}
public override double Volume() //calculate volume
{
return 1.0 / 3 * _length * _length * _height;
}
public override string ShapeProperty() //show details of chosen shape, including shape, length, and height
{
string property = "Pyramid";
property += '\t';
property += string.Format("{0,8:F2}", _length);
property += '\t';
property += string.Format("{0,8:F2}", _height);
return property;
}
}
}
Constant.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace homework7
{
class Constant
{
public static double pi = 3.1415926;
}
}
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