using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace 计算器 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void toolStripLabel1_Click(object sender, EventArgs e) { } private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e) { } private void 科学型ToolStripMenuItem_Click(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { } private void textBox1_TextChanged(object sender, EventArgs e) { } private void button1_Click_1(object sender, EventArgs e) { this.textBox1.Text = ""; } public bool down; private void dd_Click(object sender, EventArgs e) { if(down) { if (this.textBox1.Text.Contains("+") && this.textBox1.Text.Substring(textBox1.Text.Length - 1) == "0") { this.textBox1.Text += "."; } else { this.textBox1.Text = "输入错误"; } down = false; } else { this.textBox1.Text += "."; down = true; } } public double fuhao; private void and_Click(object sender, EventArgs e) { fuhao = 1; this.textBox1.Text += "+"; } private void dengyu_Click(object sender, EventArgs e) { if (this.textBox1.Text.Substring(0, 1) == "-") { this.textBox1.Text = this.textBox1.Text.Substring(1); double sum; char[] chr = new char[] { '+', '-', '*', '/', '%' }; string[] no = this.textBox1.Text.Split(chr); double a = -Convert.ToDouble(no[0]); double b = Convert.ToDouble(no[1]); if (fuhao == 1) { sum = a + b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 2) { sum = a - b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 3) { sum = a * b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 4) { sum = a / b; textBox1.Text = Convert.ToString(sum); } } else { double sum; char[] chr = new char[] { '+', '-', '*', '/', '%' }; for (int i = 0; i < chr.Length; i++) { if (!this.textBox1.Text.Contains(chr[i])) { this.textBox1.Text = this.textBox1.Text; } else { string[] no = this.textBox1.Text.Split(chr); double a = Convert.ToDouble(no[0]); double b = Convert.ToDouble(no[1]); if (fuhao == 1) { sum = a + b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 2) { sum = a - b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 3) { sum = a * b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 4) { sum = a / b; textBox1.Text = Convert.ToString(sum); } else if (fuhao == 5) { sum = a % b; textBox1.Text = Convert.ToString(sum); } } } } } private void jian_Click(object sender, EventArgs e) { fuhao = 2; this.textBox1.Text += "-"; } private void cheng_Click(object sender, EventArgs e) { fuhao = 3; this.textBox1.Text += "*"; } private void chu_Click(object sender, EventArgs e) { fuhao = 4; this.textBox1.Text += "/"; } private void num6_Click(object sender, EventArgs e) { Button btr = (Button)sender; if (this.textBox1.Text == "0") { this.textBox1.Text = btr.Text ; } else { this.textBox1.Text += btr.Text ; } } private void back_Click(object sender, EventArgs e) { if (this.textBox1.Text.Length == 1) { this.textBox1.Text = "0"; } else { this.textBox1.Text = this.textBox1.Text.Substring(0, this.textBox1.Text.Length - 1); } } private void yu_Click(object sender, EventArgs e) { fuhao = 5; this.textBox1.Text += "%"; } private void clear_Click(object sender, EventArgs e) { this.textBox1.Text = "0"; } private void reverst_Click(object sender, EventArgs e) { this.textBox1.Text =( 1 / (Convert.ToDouble( this.textBox1.Text.Trim()))).ToString(); } private void mi_Click(object sender, EventArgs e) { if (Convert.ToDouble(this.textBox1.Text )<=0) { this.textBox1.Text = "无效输入"; } else { this.textBox1.Text = Math.Sqrt(Convert.ToDouble(this.textBox1.Text.Trim())).ToString(); } } private void zhengfu_Click(object sender, EventArgs e) { if (this.textBox1.Text == "0") { this.textBox1.Text = this.textBox1.Text; } else if (Convert.ToDouble(this.textBox1.Text) < 0) { this.textBox1.Text = this.textBox1.Text.Substring(1); } else { this.textBox1.Text = "-" + this.textBox1.Text; } } } }