using System;
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 textBox2_TextChanged(object sender, EventArgs e)
{
}
private void label1_Click(object sender, EventArgs e)
{
}
private void label2_Click(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
String b1,b2;
float c1;
b1=textBox1.Text;
float f1 = float.Parse(b1);
b2 = textBox2.Text;
float f2 = float.Parse(b2);
Single.TryParse(b2, out f2);
c1=f1+f2;
label2.Text = c1.ToString();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
String b1, b2;
float c1;
b1 = textBox1.Text;
float f1 = float.Parse(b1);
b2 = textBox2.Text;
float f2 = float.Parse(b2);
Single.TryParse(b2, out f2);
c1 = f1 * f2;
label2.Text = c1.ToString();
}
private void button2_Click(object sender, EventArgs e)
{
String b1, b2;
float c1;
b1 = textBox1.Text;
float f1 = float.Parse(b1);
b2 = textBox2.Text;
float f2 = float.Parse(b2);
Single.TryParse(b2, out f2);
c1 = f1 - f2;
label2.Text = c1.ToString();
}
private void button4_Click(object sender, EventArgs e)
{
String b1, b2;
float c1;
b1 = textBox1.Text;
float f1 = float.Parse(b1);
b2 = textBox2.Text;
float f2 = float.Parse(b2);
Single.TryParse(b2, out f2);
c1 = f1 / f2;
label2.Text = c1.ToString();
if (f2 == 0)
label2.Text = "無法除以零";
}
}
}
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