实验反馈1MooMX的博客-

首先，刚入门C#可视化，跟老师学习了制作计算器（粗糙版）

用到了Button,Label和TextBox
经测试，正常（包括小数部分）
其中除数为零的处理方式为弹窗显示无穷大，并强制清零
因为测试时发现TextBox显示无穷大后再按符号会出错

以下是代码

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace Calculator { public partial class Form1 : Form { public Form1() { InitializeComponent(); } double i, j, k; char a; private void button1_Click(object sender, EventArgs e) { //MessageBox.Show("1");             textBox1.Text += "1"; } private void button2_Click(object sender, EventArgs e) {             textBox1.Text += "2"; } private void button3_Click(object sender, EventArgs e) {             textBox1.Text += "3"; } private void button4_Click(object sender, EventArgs e) {             textBox1.Text += "4"; } private void button5_Click(object sender, EventArgs e) {             textBox1.Text += "5"; } private void button6_Click(object sender, EventArgs e) {             textBox1.Text += "6"; } private void button7_Click(object sender, EventArgs e) {             textBox1.Text += "7"; } private void button8_Click(object sender, EventArgs e) {             textBox1.Text += "8"; } private void button9_Click(object sender, EventArgs e) {             textBox1.Text += "9"; } private void button0_Click(object sender, EventArgs e) {             textBox1.Text += "0"; } private void point_Click(object sender, EventArgs e) {             textBox1.Text += "."; } private void equal_Click(object sender, EventArgs e) {             j = Convert.ToDouble(textBox1.Text); switch(a) { case '+':                     k = i + j;                     textBox1.Text = k.ToString(); break; case '-':                     k = i - j;                     textBox1.Text = k.ToString(); break; case '*':                     k = i * j;                     textBox1.Text = k.ToString(); break; case '/': if(i==0) {                         MessageBox.Show("∞");                         textBox1.Text = ""; break; }                     k = i / j;                     textBox1.Text = k.ToString(); break; } } private void add_Click(object sender, EventArgs e) {             i = Convert.ToDouble(textBox1.Text);             textBox1.Text = "";             a = '+'; } private void subtraction_Click(object sender, EventArgs e) {             i = Convert.ToDouble(textBox1.Text);             textBox1.Text = "";             a = '-'; } private void multiplication_Click(object sender, EventArgs e) {             i = Convert.ToDouble(textBox1.Text);             textBox1.Text = "";             a = '*'; } private void division_Click(object sender, EventArgs e) {             i = Convert.ToDouble(textBox1.Text);             textBox1.Text = "";             a = '/'; } private void clear_Click(object sender, EventArgs e) {             textBox1.Text = ""; } private void fraction_Click(object sender, EventArgs e) {             i = Convert.ToDouble(textBox1.Text); if (i == 0) {                 MessageBox.Show("∞");                 textBox1.Text = ""; } else {                 i = 1 / i;                 textBox1.Text = Convert.ToString(i); } } } }