作业要求

乘法计算器

程序

namespace Expl_02
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void label1_Click(object sender, EventArgs e)
    {

    }

    private void button2_Click(object sender, EventArgs e)
    {
        textBox1.Text = "";
        textBox2.Text = "";
        textBox3.Text = "";
    }

    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成数值
        num2 = float.Parse(textBox2.Text);
        result = num1 * num2;
        textBox3.Text = result.ToString();  //将数值转换成字符
    }
}

效果