2018-10-18

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 WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_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为数值 num2 = float.Parse(textBox2.Text); result = num1 * num2; textBox3.Text=result.ToString ();//将数值转换为字符 } private void button2_Click(object sender, EventArgs e) { textBox1 .Text =""; textBox2 .Text =""; textBox3.Text = ""; }