C#设计一个简单的计算器，实现两个数的加，减，乘，除，求幂等计算，运行效果如下图所示：

1.题目要求如下：

C#设计一个简单的计算器，实现两个数的加，减，乘，除，求幂等计算，运行效果如下图所示：

2.这边需要用到的是VS2019下的C#Windows窗体

3.来吧，展示：

using System;using System.Windows.Forms;namespace Calculator{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            MessageBox.Show("欢迎使用小关牌计算器！");        }        private void button1_Click(object sender, EventArgs e)        {            try            {                string s1 = textBox1.Text;                string s2 = textBox2.Text;                int i1, i2;                i1 = (int)Convert.ToInt64(s1);                i2 = (int)Convert.ToInt64(s2);                string s3 = (i1   i2).ToString();                MessageBox.Show(s3);            }            catch            {                MessageBox.Show("错误，请检查!");            }        }        private void button3_Click(object sender, EventArgs e)        {            try            {                string s1 = textBox1.Text;                string s2 = textBox2.Text;                double i1, i2;                i1 = (int)Convert.ToInt64(s1);                i2 = (int)Convert.ToInt64(s2);                string s3 = (i1 / i2).ToString();                MessageBox.Show(s3);            }            catch            {                MessageBox.Show("错误，请检查!");            }        }        private void textBox1_TextChanged(object sender, EventArgs e)        {                               }        private void label2_Click(object sender, EventArgs e)        {            MessageBox.Show("目前不支持其他运算!");        }        private void label3_Click(object sender, EventArgs e)        {        }        private void textBox3_TextChanged(object sender, EventArgs e)        {                   }        private void textBox2_TextChanged(object sender, EventArgs e)        {                               }        private void button1_Click_1(object sender, EventArgs e)        {            try            {                string s1 = textBox1.Text;                string s2 = textBox2.Text;                int i1, i2;                i1 = (int)Convert.ToInt64(s1);                i2 = (int)Convert.ToInt64(s2);                string s3 = (i1 - i2).ToString();                MessageBox.Show(s3);            }            catch            {                MessageBox.Show("错误，请检查!");            }        }        private void button2_Click(object sender, EventArgs e)        {            try            {                string s1 = textBox1.Text;                string s2 = textBox2.Text;                int i1, i2;                i1 = (int)Convert.ToInt64(s1);                i2 = (int)Convert.ToInt64(s2);                string s3 = (i1 * i2).ToString();                MessageBox.Show(s3);            }            catch            {                MessageBox.Show("错误，请检查!");            }        }        private void button4_Click(object sender, EventArgs e)        {            try            {                string s1 = textBox1.Text;                string s2 = textBox2.Text;                int i1, i2;                i1 = (int)Convert.ToInt64(s1);                i2 = (int)Convert.ToInt64(s2);                double s3 = Math.Pow(i1, i2);                string s4 = Convert.ToString(s3);                MessageBox.Show(s4);            }            catch            {                MessageBox.Show("错误，请检查!");            }        }        private void button5_Click(object sender, EventArgs e)        {            //归零            textBox1.Text = string.Empty;            textBox2.Text = string.Empty;        }    }}

这个有140多行代码稍微有点长，有待改善

4.来看看运行结果：ctrl f5

这边自由发挥加上了弹窗提示的效果

这边演示的为9的9次方结果