首先,刚入门C#可视化,跟老师学习了制作计算器(粗糙版) 以下是代码

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); } } } }
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