十进制数转换为二进制,八进制,十六进制数的算法

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

namespace ExDtoB
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

//十进制转二制
public string DtoB(int d)
{
string b = "";
//判断该数如果小于2，则直接输出
if (d < 2)
{
b = d.ToString();
}
else
{
int c;
int s = 0;
int n = d;
while (n >= 2)
{
s++;
n = n / 2;
}
int[] m = new int[s];
int i = 0;
do
{
c = d / 2;
m[i++] = d % 2;
d = c;
} while (c >= 2);
b = d.ToString();
for (int j = m.Length - 1; j >=0; j--)
{
b += m[j].ToString ();
}
}
return b;
}

//十进制转八进制
public string DtoO(int d)
{
string o = "";
if (d < 8)
{
o = d.ToString();
}
else
{
int c;

int s=0;
int n=d;
int temp = d;
while (n >= 8)
{
s++;
n = n / 8;
}
int[] m = new int[s];
int i = 0;
do
{
c = d / 8;
m[i++] = d % 8;
d = c;
} while (c >= 8);
o = d.ToString();
for (int j = m.Length - 1; j >= 0; j--)
{
o += m[j];
}
}
return o;
}

//十进制转十六进制
public string DtoX(int d)
{
string x = "";
if (d < 16)
{
x = chang(d);
}
else
{
int c;

int s = 0;
int n = d;
int temp = d;
while (n >= 16)
{
s++;
n = n / 16;
}
string [] m = new string[s];
int i = 0;
do
{
c = d / 16;
m[i++] = chang(d % 16);//判断是否大于10，如果大于10，则转换为A~F的格式
d = c;
} while (c >= 16);
x = chang(d);
for (int j = m.Length - 1; j >= 0; j--)
{
x += m[j];
}
}
return x;
}

//判断是否为10~15之间的数，如果是则进行转换
public string chang(int d)
{
string x = "";
switch (d)
{
case 10:
x = "A";
break;
case 11:
x = "B";
break;
case 12:
x = "C";
break;
case 13:
x = "D";
break;
case 14:
x = "E";
break;
case 15:
x = "F";
break;
default:
x = d.ToString();
break;
}
return x;
}

private void button1_Click(object sender, EventArgs e)
{
textBox2.Text = DtoB(Convert.ToInt32(textBox1.Text));//十转二进制
}

private void button2_Click(object sender, EventArgs e)
{
textBox2.Text = DtoO(Convert.ToInt32(textBox1.Text));//十转八进制
}

private void button3_Click(object sender, EventArgs e)
{
textBox2.Text = DtoX(Convert.ToInt32(textBox1.Text));//十转十六进制
}
}
}