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C#實(shí)現(xiàn)簡易計(jì)算器功能(附源碼)

更新時(shí)間：2021年07月21日 12:16:21 作者：Just Do Its

這篇文章主要為大家詳細(xì)介紹了C#實(shí)現(xiàn)簡易計(jì)算器，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了C#實(shí)現(xiàn)簡易計(jì)算器功能的具體代碼，供大家參考，具體內(nèi)容如下

剖析：

1、先設(shè)計(jì)界面(按鈕、文本框(一個(gè)顯示算式,一個(gè)顯示結(jié)果))布局
2、單擊按鈕將其對應(yīng)內(nèi)容顯示在文本框中
3、單擊符號(+、-、×、÷、%)時(shí)將第一次輸入的數(shù)儲(chǔ)存起來
4、單擊等號時(shí)將第二次輸入的數(shù)存儲(chǔ)起來并將第一次輸入的數(shù)與第二次輸入的數(shù)按照所單擊的符號進(jìn)行運(yùn)算將結(jié)果顯示在第一個(gè)文本框中
5、單擊C時(shí)將兩個(gè)文本框中的內(nèi)容清空

重點(diǎn)：

1、聲明一個(gè)bool類型的變量用于實(shí)現(xiàn)單擊符號再次輸入數(shù)字時(shí)第一次輸入的數(shù)字清空顯示第二次輸入的數(shù)字
2、聲明兩個(gè)double類型的變量用于裝第一次輸入的數(shù)和裝第二次輸入的數(shù)
3、聲明一個(gè)string類型的變量用于判斷運(yùn)算符號

界面布局：

具體代碼如下：

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 Test_Calculator
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //聲明三個(gè)變量
        string type; //符號類型
        double x;//裝第一個(gè)數(shù)(按符號(+-×÷%)時(shí)textbox1中的數(shù)字)
        double y;//裝第二個(gè)數(shù)(按等號時(shí)textbox1中的數(shù)字)
        bool c=false;
        private void Form1_Load(object sender, EventArgs e)
        {
            this.CenterToScreen();//窗體居中顯示
            this.Text = "計(jì)算器";
            this.FormBorderStyle = FormBorderStyle.FixedToolWindow;
            textBox1.ReadOnly = true;//文本框只讀
            textBox2.TabIndex = 0;//光標(biāo)焦點(diǎn)在textbox2中
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (c==true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "1";
            textBox2.Text += "1";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "2";
            textBox2.Text += "2";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "3";
            textBox2.Text += "3";
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "4";
            textBox2.Text += "4";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "5";
            textBox2.Text += "5";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "6";
            textBox2.Text += "6";
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "7";
            textBox2.Text += "7";
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "8";
            textBox2.Text += "8";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "9";
            textBox2.Text += "9";
        }

        private void button10_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                c = false;
                textBox1.Text = "";
            }
            textBox1.Text += "0";
            textBox2.Text += "0";
        }

        private void button11_Click(object sender, EventArgs e)
        {
            textBox1.Text += ".";
            textBox2.Text += ".";
        }

        private void button12_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
        }

        private void button13_Click(object sender, EventArgs e)
        {
            c = true;
            type = "+";
            textBox2.Text += "+";
            x = double.Parse(textBox1.Text);
        }

        private void button14_Click(object sender, EventArgs e)
        {
            c = true;
            type = "-";
            textBox2.Text += "-";
            x = double.Parse(textBox1.Text);
        }

        private void button15_Click(object sender, EventArgs e)
        {
            c = true;
            type = "×";
            textBox2.Text += "×";
            x = double.Parse(textBox1.Text);
        }

        private void button16_Click(object sender, EventArgs e)
        {
            c = true;
            type = "÷";
            textBox2.Text += "÷";
            x = double.Parse(textBox1.Text);
        }

        private void button18_Click(object sender, EventArgs e)
        {
            c = true;
            type = "%";
            textBox2.Text += "%";
            x = double.Parse(textBox1.Text);
        }

        private void button17_Click(object sender, EventArgs e)
        {
            y = double.Parse(textBox1.Text);
            //法一
            while (type=="+")
            {
                textBox1.Text = (x + y).ToString();
                textBox2.Text += "=" + textBox1.Text;
                return;
            }
            while (type == "-")
            {
                textBox1.Text = (x - y).ToString();
                textBox2.Text += "=" + textBox1.Text;
                return;
            } 
            while (type == "×")
            {
                textBox1.Text = (x * y).ToString();
                textBox2.Text += "=" + textBox1.Text;
                return;
            } 
            while (type == "÷")
            {
                if (y!=0)
                {
                    textBox1.Text = (x / y).ToString();
                    textBox2.Text += "=" + textBox1.Text;
                }
                else
                {
                    MessageBox.Show("請重新輸入","錯(cuò)誤",MessageBoxButtons.OK,MessageBoxIcon.Information);
                    textBox1.Text = "";
                    textBox2.Text = "";
                }
                return;
            }
            while (type == "%")
            {
                textBox1.Text = (x % y).ToString();
                textBox2.Text += "=" + textBox1.Text;
                return;
            }
            
            //法二：
            //if (type=="+")
            //{
            //    textBox1.Text=(x + y).ToString();
            //    textBox2.Text += "=" + textBox1.Text;
            //}
            //if (type=="-")
            //{
            //    textBox1.Text = (x - y).ToString();
            //    textBox2.Text += "=" + textBox1.Text;
            //}
            //if (type=="×")
            //{
            //    textBox1.Text = (x * y).ToString();
            //    textBox2.Text += "=" + textBox1.Text;
            //}
            //if (type=="÷")
            //{
            //    textBox1.Text = (x / y).ToString();
            //    textBox2.Text += "=" + textBox1.Text;
            //}
            //if (type=="%")
            //{
            //    textBox1.Text = (x % y).ToString();
            //    textBox2.Text += "=" + textBox1.Text;
            //}
        }

    }
}

效果圖: