c#计算器代码.docx
c#计算器代码以下控件表 控件类型 Name Text form calcForm 计算器 button button1 0 . button10 9 bDot .(小数点) 小数点按钮 bPlus +(加号) 加号按钮 bSub -(减号) 减号按钮 bMul *(乘号) 乘号按钮 bDiv /(除号) 除号按钮 bEqu =(等号) 等号按钮 bClr AC 清除按钮 textBox txtCalc (空值) 用来显示输入及输出结果 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace calculator public partial class Form1 : Form public Form1 InitializeComponent; public string a; public string b; public string num; public string op; public string result; public int i = 0; private void button1_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "7" else num = num + "7" result = num; show; public void show /在textBox1里显示数据 if (i = 0) tBshow.Text = num + "." else tBshow.Text = num; private void b1_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "1" else num = num + "1" result = num; show; private void b2_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "2" else num = num + "2" result = num; show; private void b3_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "3" else num = num + "3" result = num; show; private void b4_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "4" else num = num + "4" result = num; show; private void b5_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "5" else num = num + "5" result = num; show; private void b6_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "6" else num = num + "6" result = num; show; private void b8_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "8" else num = num + "8" result = num; show; private void b9_Click(object sender, EventArgs e) if (num = "0") num = null; num = num + "9" else num = num + "9" result = num; show; private void b0_Click(object sender, EventArgs e) if (num != "0") num = num + "0" else num = "0" result = num; show; private void bDot_Click(object sender, EventArgs e) if (i = 0) num = num + "." i = 1; private void bPlus_Click(object sender, EventArgs e) a = result; op = "+" i = 0; num = null; private void bSub_Click(object sender, EventArgs e) a = result; op = "-" i = 0; num = null; private void bMul_Click(object sender, EventArgs e) a = result; op = "*" i = 0; num = null; private void bDiv_Click(object sender, EventArgs e) a = result; op = "/" i = 0; num = null; private void result_Box /将结果显示在textBox1中 tBshow.Text = result; private void bEqu_Click(object sender, EventArgs e) b = num; double m = 0, n = 0; double r = 0; if (num = null) tBshow.Text = "0" /若直接按“=”，则显示textBox1值为0 else if (op = null) tBshow.Text = result; num = null; /若输入了第一个数但未选择运算符，默认textBox1的值为num else if (b = null) /若输入了运算符但未输入第二个数，默认两个数相同 m = double.Parse(a); n = double.Parse(a); switch (op) case "+": r = m + n; result = r.ToString; result_Box; break; case "-": r = m - n; result = r.ToString; result_Box; break; case "*": r = m * n; result = r.ToString; result_Box; break; case "/": if (n = 0) tBshow.Text = "除数不能为0" else r = m / n; result = r.ToString; result_Box; break; else /输入已完成，执行“=” m = double.Parse(a); n = double.Parse(b); switch (op) case "+": r = m + n; result = r.ToString; result_Box; break; case "-": r = m - n; result = r.ToString; result_Box; break; case "*": r = m * n; result = r.ToString; result_Box; break; case "/": if (n = 0) tBshow.Text = "除数不能为0" else r = m / n; result = r.ToString; result_Box; break; num = "0" i = 0; private void bBack_Click(object sender, EventArgs e) num = result; if (num != null) if (num.Substring(num.Length - 1, 1) != ".") if (num.Length > 1) string k; k = num; k = k.Substring(0, num.Length - 1); num = k; result = num; result_Box; else num = "0" i = 0; show; else if (num.Length > 1) string k; k = num; k = k.Substring(0, num.Length - 2); i = 0; num = k; tBshow.Text = num; result = num; else num = "0" i = 0; show; else tBshow.Text = "未输入数据" private void bClr_Click(object sender, EventArgs e) tBshow.Text = "0." num = null; op = null; i = 0; private void tBshow_TextChanged(object sender, EventArgs e)
