close
--------------------------------------------------------------------------------
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
String a1, a2,b;
float numVal, num1, num2;
public Form1()
{
InitializeComponent();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
label1.Text = button1.Text;
a1 = textBox1.Text;
float num1 = float.Parse(a1);
a2 = textBox2.Text;
float num2 = float.Parse(a2);
float numVal = num1 + num2;
label3.Text=numVal.ToString();
}
private void button2_Click(object sender, EventArgs e)
{
label1.Text = button2.Text;
a1 = textBox1.Text;
float num1 = float.Parse(a1);
a2 = textBox2.Text;
float num2 = float.Parse(a2);
float numVal = num1 - num2;
label3.Text = numVal.ToString();
}
private void button3_Click(object sender, EventArgs e)
{
label1.Text = button3.Text;
a1 = textBox1.Text;
float num1 = float.Parse(a1);
a2 = textBox2.Text;
float num2 = float.Parse(a2);
float numVal = num1 * num2;
label3.Text = numVal.ToString();
}
private void button4_Click(object sender, EventArgs e)
{
label1.Text = button4.Text;
a1 = textBox1.Text;
float num1 = float.Parse(a1);
a2 = textBox2.Text;
float num2 = float.Parse(a2);
if (num2 == 0)
{
String b = "Error";
label3.Text = b;
}
else
{
float numVal = num1 / num2;
label3.Text = numVal.ToString();
}
}
private void label1_Click(object sender, EventArgs e)
{
}
private void label2_Click(object sender, EventArgs e)
{
}
private void label3_Click(object sender, EventArgs e)
{
}
}
}
全站熱搜
留言列表
