作业

```
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void label1_Click(object sender, EventArgs e) { float num1 = 0; float num2 = 0; float result = 0; num1 = float.Parse(textBox1.Text); //将文本框输入的字符转换成数值 num2 = float.Parse(textBox2.Text); result = num1 * num2; textBox3.Text = result.ToString();//将数值转换成字符 } private void button2_Click(object sender, EventArgs e) { textBox1.Text = ""; textBox2.Text = ""; textBox3.Text = ""; } private void button1_Click(object sender, EventArgs e) { } } }

 

 

```