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 WindowsFormsApplication1 { public partial class Form1 : Form { double a; int b = 1; string c; public Form1() {
InitializeComponent(); }
private void Form1_Load(object sender, EventArgs e) {
}
private void textBox1_TextChanged(object sender, EventArgs e) {
}
private void BtnNum7_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "7";
}
private void BtnNum8_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "8";
}
private void BtnNum9_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "9";
}
private void BtnNum4_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "4";
}
private void BtnNum5_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "5";
}
private void BtnNum6_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "6";
}
private void BtnNum1_Click(object sender, EventArgs e) { if(b == 1) { textBox1 .Text =""; b=2 ; } textBox1.Text+="1"; }
private void BtnNum2_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "2";
}
private void BtnNum3_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "3";
}
private void BtnZero_Click(object sender, EventArgs e) { if (b == 1) { textBox1.Text = ""; b = 2; } textBox1.Text += "0"; if (c == "/") { textBox1.Text = "Error"; MessageBox.Show("除数不能为零"); }
}
private void BtnAdd_Click(object sender, EventArgs e) { b = 1; a = double.Parse(textBox1.Text); c = "+"; }
private void BtnSub_Click(object sender, EventArgs e) { b = 1; a = double.Parse(textBox1.Text); c = "-"; }
private void BtnMul_Click(object sender, EventArgs e) { b = 1; a = double.Parse(textBox1.Text); c = "*"; }
private void BtnDiv_Click(object sender, EventArgs e) { b = 1; a = double.Parse(textBox1.Text); c = "/"; }
private void BtnSqrt_Click(object sender, EventArgs e) { b = 1; a = double.Parse(textBox1.Text); c = "sqrt"; }
private void BtnResult_Click(object sender, EventArgs e) { switch (c) { case "+": a = a + double.Parse(textBox1.Text); break; case "-": a = a - double.Parse(textBox1.Text); break; case "*": a = a * double.Parse(textBox1.Text); break; case "/": a = a / double.Parse(textBox1.Text); break; case "sqrt": a = Math.Sqrt(a ); break; } textBox1.Text = a + ""; b =1; }
private void BtnClear_Click(object sender, EventArgs e) { textBox1.Text = "0"; } } }