Chuong trinh sap xep tren mang

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication5

{

public partial class Form1 : Form

{

public int[] a;

public int spt = 0;

public Form1()

{

InitializeComponent();

}

private void label1_Click(object sender, EventArgs e)

{

}

private void radioButton2_CheckedChanged(object sender, EventArgs e)

{

if (button3.Enabled == false)

button3.Enabled = true;

}

private void button4_Click(object sender, EventArgs e)

{

this.Close();

}

private void button1_Click(object sender, EventArgs e)

{

bool ok;

ok = int.TryParse(textBox1.Text, out gt);

if (!ok)

{

MessageBox.Show("gia tri phai la so nguyen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox1.Focus();

return;

}

// them phan tu

spt++;

Array.Resize<int>(ref a, spt);

a[spt - 1] = gt;

button2.Enabled = true;

button1.Enabled = true;

// vo hieu hoa cac nut neu chua chon dieu kien

if (radioButton1.Checked == false && radioButton2.Checked == false)

button3.Enabled = false;

}

private void button2_Click(object sender, EventArgs e)

{

// xoa du kieu cu

textBox2.Clear();

// in mang

for (int i = 0; i < spt; i++)

textBox2.Text = textBox2.Text + a[i].ToString() + "";

}

private void button3_Click(object sender, EventArgs e)

{

// sap xep gian dan

if (radioButton2.Checked == true)

{

for(int i=0;i<=a.Length-2;i++)

for(int j=i+1; j<=a.Length-1;j++)

if (a[i] < a[j])

{

tg = a[i];

a[i] = a[j];

a[j] = tg;

}

}

// sap xep tang dan

if (radioButton1.Checked == true)

{

for(int i=0;i<=a.Length-2;i++)

for(int j=i+1;j<=a.Length-1;j++)

if (a[i] > a[j])

{

tg = a[i];

a[i] = a[j];

a[j] = tg;

}

}

// in mang da sap xep

textBox3.Clear();

for(int i=0;i<=a.Length-1;i++)

{

textBox3.Text=textBox3.Text+a[i].ToString()+"";

}

}

private void radioButton1_CheckedChanged(object sender, EventArgs e)

{

// cho phep nut sap xep hoat dong khi chon nut sap xep

if (button3.Enabled == false)

button3.Enabled = true;

}

}

}

Xây dựng chương trình thêm bớt phần tử mảng

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication4

{

public partial class Form1 : Form

{

// khai bao cac bien dung chung

public int[] a;

public int spt;

public Form1()

{

InitializeComponent();

}

private void groupBox1_Enter(object sender, EventArgs e)

{

button1.Enabled = true;

button2.Enabled = true;

}

private void label6_Click(object sender, EventArgs e)

{

}

private void button1_Click(object sender, EventArgs e)

{

// kiem tra tinh hop le khi nhap du lieu

bool ok;

ok = int.TryParse(textBox1.Text, out gt);

if (!ok)

{

MessageBox.Show("gia tri phai la so nguyen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox1.Focus();

return;

}

// them phan tu

spt++;

Array.Resize<int>(ref a, spt);

a[spt - 1] = gt;

// cho phep cac doi tuong hoat dong

}

private void groupBox2_Enter(object sender, EventArgs e)

{

}

private void button2_Click(object sender, EventArgs e)

{

textBox2.Clear();

for (int i = 0; i < spt; i++)

textBox2.Text = textBox2.Text + a[i].ToString() + "";

}

private void button3_Click(object sender, EventArgs e)

{

// kiem tra hop le vi tri khi xoa

bool ok;

int vt;

ok = int.TryParse(textBox3.Text, out vt);

if (!ok)

{

MessageBox.Show("phai nhap vi tri xoa", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox3.Focus();

return;

}

if (vt < 0 || vt > spt)

{

MessageBox.Show("vi tri phai tu 1 den" + spt.ToString(),

"thong bao", MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox4.Focus();

return;

}

// xoa phan tu

if (vt == spt)

{

spt--;

Array.Resize<int>(ref a, spt);

}

else

{

for (int i = vt - 1; i < spt - 1; i++)

a[i] = a[i + 1];

spt--;

Array.Resize<int>(ref a, spt);

}

// xoa noi dung cac doi tuong khi da xoa het mang

if (spt == 0)

{

textBox3.Clear();

textBox4.Clear();

textBox5.Clear();

textBox6.Clear();

textBox2.Clear();

textBox1.Clear();

return;

}

// in mang da xoa

textBox4.Clear();

for (int i = 0; i < spt; i++)

textBox4.Text = textBox4.Text + a[i].ToString() + "";

}

private void button4_Click(object sender, EventArgs e)

{

// kiem tra hop le vi tri chen

bool ok;

int vt;

ok = int.TryParse(textBox5.Text, out vt);

if (!ok)

{

MessageBox.Show("phai nhap vi tri chen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox5.Focus();

return;

}

if (vt < 0 || vt > spt)

{

MessageBox.Show("vi tri chen phai tu 1 den" + spt.ToString(), "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox5.Focus();

return;

}

//kiem tra tinh hop le gia tri chen

ok = int.TryParse(textBox6.Text, out gt);

if (!ok)

{

MessageBox.Show("phai nhap gia tri chen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox6.Focus();

return;

}

// chen phan tu

spt++;

Array.Resize<int>(ref a, spt);

for (int i = spt - 1; i > vt - 1; i--)

{

a[i] = a[i - 1];

}

a[vt - 1] = gt;

// in mang da chen

textBox7.Clear();

for (int i = 0; i < spt; i++)

textBox7.Text = textBox7.Text + a[i].ToString() + "";

}

private void button5_Click(object sender, EventArgs e)

{

this.Close();

}

}

}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication7

{

public partial class Form1 : Form

{

public int[] a;

public int spt = 0;

public Form1()

{

InitializeComponent();

}

private void button4_Click(object sender, EventArgs e)

{

this.Close();

}

private void button1_Click(object sender, EventArgs e)

{

bool ok;

ok = int.TryParse(textBox1.Text, out gt);

if (!ok)

{

MessageBox.Show("gia tri nhap phai la so nguyen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox1.Focus();

return;

}

// them phan tu vao mang

spt++;

Array.Resize<int>(ref a, spt);

a[spt - 1] = gt;

button2.Enabled = true;

groupBox2.Enabled = true;

}

private void button2_Click(object sender, EventArgs e)

{

textBox2.Clear();

for (int i = 0; i < spt; i++)

textBox2.Text = textBox2.Text + a[i].ToString() + "";

}

private void button3_Click(object sender, EventArgs e)

{

int dem;

// tinh tong gia tri cac phan tu

tong = 0;

for (int i = 0; i < spt; i++)

{

tong += a[i];

}

textBox3.Text = tong.ToString();

// tinh tong so chan

tong = 0;

for (int i = 0; i < spt; i++)

{

if (a[i] % 2 == 0 && a[i] != 0)

tong += a[i];

}

textBox4.Text = tong.ToString();

// tinh tong so le

tong = 0;

for (int i = 0; i < spt; i++)

{

if (a[i] % 2 != 0)

tong += a[i];

}

textBox5.Text = tong.ToString();

//tinh trung binh cong so le

tong = 0;

dem = 0;

for (int i = 0; i < spt - 1; i++)

{

if (a[i] % 2 != 0)

{

tong += a[i];

dem++;

}

}

if (dem != 0)

textBox7.Text = (tong / dem).ToString();

else

textBox7.Text = "khong co so le";

// tinh trung binh cong so chan

tong = 0;

dem = 0;

for (int i = 0; i < spt; i++)

{

if (a[i] % 2 == 0 && a[i] != 0)

{

tong += a[i];

dem++;

}

}

if (dem != 0)

textBox6.Text = (tong / dem).ToString();

else

textBox6.Text = "khong co so chan";

}

}

}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication6

{

public partial class Form1 : Form

{

public int[] a;

public int spt=0;

public Form1()

{

InitializeComponent();

}

private void button3_Click(object sender, EventArgs e)

{

this.Close();

}

private void groupBox1_Enter(object sender, EventArgs e)

{

}

private void button1_Click(object sender, EventArgs e)

{

bool ok;

ok = int.TryParse(textBox1.Text, out gt);

if (!ok)

{

MessageBox.Show("gia tri nhap phai la so nguyen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox1.Focus();

return;

}

// them phan tu vao mang

spt++;

Array.Resize<int>(ref a, spt);

a[spt - 1] = gt;

button2.Enabled = true;

}

private void button2_Click(object sender, EventArgs e)

{

textBox2.Clear();

// in mang

for (int i = 0; i < spt; i++)

textBox2.Text = textBox2.Text + a[i].ToString() + "";

}

}

}

Xây dựng chương trình tìm kiếm trên mảng

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication8

{

public partial class Form1 : Form

{

public int[] a;

public int spt = 0;

public Form1()

{

InitializeComponent();

comboBox1.Items.Add("=");

comboBox1.Items.Add("<");

comboBox1.Items.Add("<=");

comboBox1.Items.Add(">");

comboBox1.Items.Add(">=");

comboBox1.Items.Add("!=");

comboBox1.Items.Add("Min");

comboBox1.Items.Add("Max");

comboBox1.Items.Add("[]");

}

private void button4_Click(object sender, EventArgs e)

{

this.Close();

}

private void button1_Click(object sender, EventArgs e)

{

bool ok;

ok = int.TryParse(textBox1.Text, out gt);

if (!ok)

{

MessageBox.Show("gia tri nhap phai la so nguyen", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox1.Focus();

return;

}

// them phan tu vao amng

spt++;

Array.Resize<int>(ref a, spt);

a[spt - 1] = gt;

}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

{

}

private void button2_Click(object sender, EventArgs e)

{

textBox2.Clear();

// in phan tu

for (int i = 0; i < spt; i++)

textBox2.Text = textBox2.Text + a[i].ToString() + "";

}

private void button3_Click(object sender, EventArgs e)

{

bool ok;

// kiem tra hop le dieu kien tim kiem

if (comboBox1.Text.Trim().Length == 0)

{

MessageBox.Show("phai nhap dieu kien tim kiem", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

comboBox1.Focus();

return;

}

// kiem tra hop le gia tri tim kiem

ok = int.TryParse(textBox3.Text, out gt);

if (!ok)

{

MessageBox.Show("phai nhap gia tri tim kiem", "thong bao",

MessageBoxButtons.OK, MessageBoxIcon.Information);

textBox3.Focus();

return;

}

// in ket qua

textBox4.Clear();

switch (comboBox1.SelectedIndex)

{

case 0:// tim voi dien kien =

for (int i = 0; i < a.Length; i++)

{

if (a[i] == int.Parse(textBox3.Text))

textBox4.Text = textBox4.Text + a[i] + "";

}

break;

case 1:// tim voi dieu kien <

for (int i = 0; i < a.Length; i++)

{

if (a[i] < int.Parse(textBox3.Text))

textBox4.Text = textBox4.Text + a[i] + "";

}

break;

case 2:// tim voi <=

for (int i = 0; i < a.Length; i++)

{

if (a[i] <= int.Parse(textBox3.Text))

textBox4.Text = textBox4.Text + a[i] + "";

}

break;

case 3:// tim voi >

for (int i = 0; i < a.Length; i++)

{

if (a[i] > int.Parse(textBox3.Text))

textBox4.Text = textBox4.Text + a[i] + "";

}

break;

case 4:// tim voi >=

for(int i=0;i<a.Length;i++)

{

if(a[i]>=int.Parse(textBox3.Text))

textBox4.Text=textBox4.Text+a[i]+"";

}

break;

case 5:// tim voi !=

for (int i = 0; i < a.Length; i++)

{

if (a[i] != int.Parse(textBox3.Text))

textBox4.Text = textBox4.Text + a[i] + "";

}

break;

case 6: // tim voi gia tri nho nhat

int min=a[0];

for (int i = 0; i < a.Length; i++)

{

if (a[i] < min)

min = a[i];

}

textBox4.Text = min.ToString();

break;

case 7: // tim voi gia tri lon nhat

int max = a[0];

for (int i = 0; i < a.Length; i++)

{

if (a[i] > max)

max = a[i];

}

textBox4.Text = max.ToString();

break;

}

}

private void textBox4_TextChanged(object sender, EventArgs e)

{

}

}

}