C# 電腦窗體程式

目錄

• • 功能設計
  • 實作代碼
  • 界面設計
  • 運作結果

功能設計

1、電腦中，添加 0-9 共十個數字鍵。

2、電腦中，增添 加、減、乘、除、等于五個功能鍵。

3、電腦中，增加四個功能鍵：x2，sqrt，log, ln 四個鍵，分别計算求平方，開方。

實作代碼

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 test3_1
{
    public partial class Form1 : Form
    {
        double result = 0;              //存儲計算結果
        double number = 0;              //存儲輸入的數字
        bool exist_value = false;       //判斷文本框中是否有值
        string operation;               //存儲輸入的運算符

        /*
         * 初始化
         */

        public Form1()
        {
            InitializeComponent();
        }

        /*
         * 數字鍵觸發事件實作
         */
        private void Seven_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "7";
        }

        private void Eight_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "8";
        }

        private void Nine_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "9";
        }

        private void Four_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "4";
        }

        private void Five_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "5";
        }

        private void Six_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "6";
        }

        private void One_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "1";
        }

        private void Two_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "2";
        }

        private void Three_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "3";
        }

        private void Zero_Click(object sender, EventArgs e)
        {
            if (exist_value == true)
            {
                textBox1.Text = "";
                exist_value = false;
            }
            textBox1.Text += "0";
        }

        /*
         * 功能鍵觸發事件
         */
        private void Add_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "+";
            }
        }

        private void Sub_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "-";
            }
        }

        private void Mul_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "*";
            }
        }

        private void Div_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "/";
            }
        }

        private void Squ_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "x^2";
            }
               
        }

        private void Sqrt_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "sqrt";
            }
        }

        private void Log_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "log";
            }
        }

        private void Ln_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("請先輸入值再計算！", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                exist_value = true;
                number = double.Parse(textBox1.Text);
                operation = "ln";
            }
        }

        private void Del_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
        }

        private void Equ_Click(object sender, EventArgs e)
        {
            switch (operation)
            {
                case "+": result = number + double.Parse(textBox1.Text); break;
                case "-": result = number - double.Parse(textBox1.Text); break;
                case "*": result = number * double.Parse(textBox1.Text); break;
                case "/":
                    {
                        double temp=double.Parse(textBox1.Text);
                        if (temp != 0)
                            result = number / temp;
                        else
                            MessageBox.Show("除數不能為零", "錯誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                        break;
                    }
                case "x^2": result = number * number; break;
                case "sqrt": result = Math.Sqrt(number); break;
                case "log": result = Math.Log10(number); break;
                case "ln": result = Math.Log(number); break;
            }
            textBox1.Text = result + "";
            exist_value = true;
        }
    }
}

           

界面設計

運作結果