作业：第一次作业第二题

#代码

namespace WindowsFormsApplication3 { 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化成数值 num2 = float.Parse(textBox2.Text); result = num1 * num2; textBox3.Text = result.ToString();//将数值转化成字符 } private void label1_Click(object sender, EventArgs e) { } private void label3_Click(object sender, EventArgs e) { } private void button2_Click(object sender, EventArgs e) { textBox1.Text = ""; textBox2.Text = ""; textBox3.Text = ""; } } }

效果