iis搭建多个网站,24小时精准天气预报,app软件开发技术,作风建设提升年活动网站基于C#桌面应用制作计算器做出了少量改动#xff0c;其主要改动为新增加了一个label控件#xff0c;使其每一步运算结果由label2展示出来#xff0c;而当点击“”时#xff0c;最终运算结果将由label1展示出来#xff0c;此时label清空。
修改后运行效果 修改后全篇代码 …基于C#桌面应用制作计算器做出了少量改动其主要改动为新增加了一个label控件使其每一步运算结果由label2展示出来而当点击“”时最终运算结果将由label1展示出来此时label清空。
修改后运行效果 修改后全篇代码
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 WindowsFormsApp计算器
{public partial class Form1 : Form{string symbol, num1, num2,Num1,Num2;double rt;public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){label1.Text null;label2.Text null;num1null;num2null;symbol null;}private void button2_Click(object sender, EventArgs e){if (label1.Text.Length 0symbolnull){label1.Text null;}else if (label1.Text.Length 0 symbol ! null){label1.Text symbol;}else{if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text num1;symbol null;}else{string del label1.Text;label1.Text del.Substring(0, del.Length - 1);label2.Text label1.Text;if (label2.Text.Length0 label1.Text.Length ! 0){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}else{if (label1.Text.Length 1 symbol null){label2.Textnull;}else{label2.Text num1;}}if (label1.Text.Length 30){if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}}}}private void button3_Click(object sender, EventArgs e){if (label1.Text.Length 0){MessageBox.Show(error);}else if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(error);}else{double reserve double.Parse(label1.Text);reserve -reserve;label1.Text reserve.ToString();if (num1 ! null symbol ! null){num2 reserve.ToString();if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}}private void button4_Click(object sender, EventArgs e){string divide ÷;if (symbol null label1.Text.Length1num1null){MessageBox.Show(无运算数字);}else{if (symbol null){if(num1 null){num1 label1.Text;}symbol divide;label1.Text symbol;label2.Text num1;}else{if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷) {MessageBox.Show(您已输入运算符);}else{num2 label1.Text;num1 rt.ToString();symbol divide;label1.Text symbol;label2.Text rt.ToString();num2 null;}}}}private void button8_Click(object sender, EventArgs e){string seven 7;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;//如果前面有运算符则先消除运算符再把数字投射到屏幕上}label1.Text label1.Text seven;//将数字投射到屏幕上if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if(num1!nullsymbol!null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button7_Click(object sender, EventArgs e){string eight 8;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text eight;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button6_Click(object sender, EventArgs e){string nine 9;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text nine;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button5_Click(object sender, EventArgs e){string multiply ×;if (symbol null label1.Text.Length 1 num1 null){MessageBox.Show(无运算数字);}else{if (symbol null){if (num1 null){num1 label1.Text;}symbol multiply;label1.Text symbol;label2.Text num1;}else{if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(您已输入运算符);}else{num2 label1.Text;num1 rt.ToString();symbol multiply;label1.Text symbol;label2.Text rt.ToString();num2 null;}}}}private void button12_Click(object sender, EventArgs e){string four 4;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text four;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button11_Click(object sender, EventArgs e){string five 5;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text five;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button10_Click(object sender, EventArgs e){string six 6;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text six;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button9_Click(object sender, EventArgs e){string subtract -;if (symbol null label1.Text.Length 1 num1 null){MessageBox.Show(无运算数字);}else{if (symbol null){if (num1 null){num1 label1.Text;}symbol subtract;label1.Text symbol;label2.Text num1;}else{if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(您已输入运算符);}else{num2 label1.Text;num1 rt.ToString();symbol subtract;label1.Text symbol;label2.Text rt.ToString();num2 null;}}}}private void button16_Click(object sender, EventArgs e){string one 1;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text one;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button15_Click(object sender, EventArgs e){string two 2;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text two;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button14_Click(object sender, EventArgs e){string three 3;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text three;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button13_Click(object sender, EventArgs e){string add ;if (symbol null label1.Text.Length 1 num1 null){MessageBox.Show(无运算数字);}else{if (symbol null){if (num1 null){num1 label1.Text;}symbol add;label1.Text symbol;label2.Text num1;}else{if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(您已输入运算符);}else{num2 label1.Text;num1 rt.ToString();symbol add;label1.Text symbol;label2.Text rt.ToString();num2 null;}}}}private void label2_Click(object sender, EventArgs e){}private void label1_Click(object sender, EventArgs e){}private void button20_Click(object sender, EventArgs e){if (label1.Text.Length 0){MessageBox.Show(error);}else if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(error);}else{double reserve double.Parse(label1.Text);reserve reserve / 100;label1.Text reserve.ToString();if (num1 ! null symbol ! null){num2 reserve.ToString();if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}}private void button19_Click(object sender, EventArgs e){string zero 0;if (label1.Text.Length 30){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){label1.Text null;}label1.Text label1.Text zero;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}if (num1 ! null symbol ! null){num2 label1.Text;if (symbol ){rt double.Parse(num1) double.Parse(num2);label2.Text rt.ToString();}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label2.Text rt.ToString();}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label2.Text rt.ToString();}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label2.Text rt.ToString();}}}private void button18_Click(object sender, EventArgs e){string dot .;int flabel1.Text.IndexOf(.);if(f -1){if(label1.Text.Length 0){MessageBox.Show(error);}else if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(error);}else{if (label1.Text.Length 30){label1.Text label1.Text dot;if (label1.Text.Length 16){label1.Font new Font(label1.Font.FontFamily, 13f, label1.Font.Style);}else{label1.Font new Font(label1.Font.FontFamily, 26f, label1.Font.Style);}}else{MessageBox.Show(字符长度超出范围);}}}else{MessageBox.Show(error);}}private void button17_Click(object sender, EventArgs e){if (symbol null label1.Text.Length 1){MessageBox.Show(无运算数字);}else{if (symbol null){num1 label1.Text;}else{if (label1.Text ! null){if (label1.Text || label1.Text - || label1.Text × || label1.Text ÷){MessageBox.Show(error);}else{num2 label1.Text;}}}}if (num2 ! null){if (symbol ){rt double.Parse(num1) double.Parse(num2);label1.Text rt.ToString();label2.Textnull;num1 rt.ToString();symbol null;num2 null;}else if (symbol -){rt double.Parse(num1) - double.Parse(num2);label1.Text rt.ToString();label2.Textnull;num1 rt.ToString();symbol null;num2 null;}else if (symbol ×){rt double.Parse(num1) * double.Parse(num2);label1.Text rt.ToString();label2.Textnull;num1 rt.ToString();symbol null;num2 null;}else if (symbol ÷){rt double.Parse(num1) / double.Parse(num2);label1.Text rt.ToString();label2.Textnull;num1 rt.ToString();symbol null;num2 null;}}}}
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