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1、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; us
2、ing 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 b
3、utton1_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
4、; 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
5、; 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, E
6、ventArgs 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
7、 = 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
8、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 =
9、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
10、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 /
11、: 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;
12、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) st
13、ring 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)
