using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
string b1;
string b2;
b1 = textBox1.Text;
float a1 = float.Parse(b1);
b2 = textBox2.Text;
float a2 = float.Parse(b2);
float c1 = a1 + a2;
label2.Text = c1.ToString();
}
private void label2_Click(object sender, EventArgs e)
{
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
string b1;
string b2;
b1 = textBox1.Text;
float a1 = float.Parse(b1);
b2 = textBox2.Text;
float a2 = float.Parse(b2);
float c1 = a1 - a2;
label2.Text = c1.ToString();
}
private void label3_Click(object sender, EventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
string b1;
string b2;
b1 = textBox1.Text;
float a1 = float.Parse(b1);
b2 = textBox2.Text;
float a2 = float.Parse(b2);
float c1 = a1 * a2;
label2.Text = c1.ToString();
}
private void button4_Click(object sender, EventArgs e)
{
string b1;
string b2;
b1 = textBox1.Text;
float a1 = float.Parse(b1);
b2 = textBox2.Text;
float a2 = float.Parse(b2);
float c1 = a1 / a2;
label2.Text = c1.ToString();
if(a2==0)
label2.Text="分母不能為0";
}
}
}
