وذلك عبر كتابة كود سي شارب :-
char symbol;
int a;
private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text+"1";
}
private void button2_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "2";
}
private void button3_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "3";
}
private void button4_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "4";
}
private void button5_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "5";
}
private void button6_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "6";
}
private void button7_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "7";
}
private void button8_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "8";
}
private void button9_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "9";
}
private void button12_Click(object sender, EventArgs e)
{
a = Convert.ToInt16( textBox1.Text);
textBox1.Text = null;
textBox1.Focus();
symbol = '+';
}
private void button13_Click(object sender, EventArgs e)
{
a = Convert.ToInt16(textBox1.Text);
textBox1.Text = null;
textBox1.Focus();
symbol = '-';
}
private void button14_Click(object sender, EventArgs e)
{
a = Convert.ToInt16(textBox1.Text);
textBox1.Text = null;
textBox1.Focus();
symbol = '*';
}
private void button15_Click(object sender, EventArgs e)
{
a = Convert.ToInt16(textBox1.Text);
textBox1.Text = null;
textBox1.Focus();
symbol = '/';
}
private void button16_Click(object sender, EventArgs e)
{
if (symbol == '+')
{
a += Convert.ToInt16(textBox1.Text);
}
if (symbol == '-')
{
a -= Convert.ToInt16(textBox1.Text);
}
if (symbol == '*')
{
a *= Convert.ToInt16(textBox1.Text);
}
if (symbol == '/')
{
a /= Convert.ToInt16(textBox1.Text);
}
textBox1.Text = null;
textBox1.Text = a.ToString();
}
private void button17_Click(object sender, EventArgs e)
{
textBox1.Clear();
}
private void button18_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("design by student Ahmed Abdulkarim talib \n computer engineering in University of technology");
}