C#简易计算器/

C#简易计算器

按钮布局根据个人喜好设置即可
Form1.cs

namespace WindowsFormsApplication24{public partial class 计算器 : Form{double a = 0;double b = 0;bool c = false;//判断文本框中是否有值string d;public 计算器(){InitializeComponent();}private void button13_Click(object sender, EventArgs e){textBox1.Text = \"\";}private void textBox1_TextChanged(object sender, EventArgs e){}private void button10_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"2\";}private void button9_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"1\";}private void button11_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"3\";}private void button14_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"0\";if (d == \"/\"){textBox1.Clear();MessageBox.Show(\"除数不能为零\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning);}}private void button5_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"4\";}private void button6_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"5\";}private void button7_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"6\";}private void button1_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"7\";}private void button2_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"8\";}private void button3_Click(object sender, EventArgs e){if (c == true)         //有值的话置为空{textBox1.Text = \"\";c = false;} textBox1.Text += \"9\";}private void button4_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true; b = double.Parse(textBox1.Text);d = \"+\";}}private void button8_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true; b = double.Parse(textBox1.Text);d = \"-\";}}private void button12_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true; b = double.Parse(textBox1.Text);d = \"*\";}}private void button16_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true; b = double.Parse(textBox1.Text);d = \"/\";}}private void button15_Click(object sender, EventArgs e){switch (d){case \"+\": a = b + double.Parse(textBox1.Text); break;case \"-\": a = b - double.Parse(textBox1.Text); break;case \"*\": a = b * double.Parse(textBox1.Text); break;case \"/\": a = b / double.Parse(textBox1.Text); break;case \"x^2\": a = b * b; break;case \"sqrt\": a = Math.Sqrt(b); break;case \"log\": a = Math.Log10(b); break;case \"ln\": a = Math.Log(b); break;} textBox1.Text = a + \"\";c = true;}private void button17_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true;b = double.Parse(textBox1.Text);d = \"x^2\";}}private void button18_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true;b = double.Parse(textBox1.Text);d = \"sqrt\";}}private void button19_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true;b = double.Parse(textBox1.Text);d = \"log\";}}private void button20_Click(object sender, EventArgs e){if (textBox1.Text == \"\") { MessageBox.Show(\"请先输入值再计算！\", \"错误提示\", MessageBoxButtons.OK, MessageBoxIcon.Warning); }else{c = true;b = double.Parse(textBox1.Text);d = \"ln\";}}private void 计算器_Load(object sender, EventArgs e){}}}