計算器 C# WINForm

現在愈來愈來鬱悶，本想着好好幹java 但是卻因爲對visual studio 2012 很熟悉。所以對用myeclipse 甚至是java有恐懼感。不行一定要hold 住。C#只是學習java的前奏，現在開始一定要放更多時間在java上，界面什麼的都是浮雲，代碼纔是最重要的。

 

這是用C# WIN Form 寫的仿win7計算器標準型   用過的應該知道win7計算器好多功能的，望塵莫及也  加油！

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Calculator
{
    public partial class Form1 : Form
    {
        double a, b,m=0;    //a爲前一個數  b爲後一個數 m是爲後面計算sqrt做準備
        int i=0,flag=0;      //i記錄用了那種運算    flag記錄上輸入框有無式子 1爲有 0爲沒有
        double z;
        public Form1()
        {
            InitializeComponent();


        }

        private void button1_Click(object sender, EventArgs e)   //”0“   當是顯示框是空時直接輸入0，或者替代前一條式子
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "0";
                textBox2.Text = textBox2.Text + "0";
            }
            else { textBox1.Text = "0"; textBox2.Text = "0"; flag = 0; }
        }

        private void button2_Click(object sender, EventArgs e)  //”1“
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "1";
                textBox2.Text = textBox2.Text + "1";
            }
            else { textBox1.Text = "1"; textBox2.Text = "1"; flag = 0; } //”2“
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "2";
                textBox2.Text = textBox2.Text + "2";
            }
            else { textBox1.Text = "2"; textBox2.Text = "2"; flag = 0; }
        }

        private void button4_Click(object sender, EventArgs e) //”3“
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "3";
                textBox2.Text = textBox2.Text + "3";
            }
            else { textBox1.Text = "3"; textBox2.Text = "3"; flag = 0; }
        }

        private void button5_Click(object sender, EventArgs e) //”4“
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "4";
                textBox2.Text = textBox2.Text + "4";
            }
            else { textBox1.Text = "4"; textBox2.Text = "4"; flag = 0; }
        }

        private void button6_Click(object sender, EventArgs e)   //”5“
        {

            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "5";
                textBox2.Text = textBox2.Text + "5";
            }
            else { textBox1.Text = "5"; textBox2.Text = "5"; flag = 0; }
        }

        private void button7_Click(object sender, EventArgs e) //”6“
        {

            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "6";
                textBox2.Text = textBox2.Text + "6";
            }
            else { textBox1.Text = "6"; textBox2.Text = "6"; flag = 0; }
        }

        private void button8_Click(object sender, EventArgs e) //”7“
        {

            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "7";
                textBox2.Text = textBox2.Text + "7";
            }
            else { textBox1.Text = "7"; textBox2.Text = "7"; flag = 0; }
        }

        private void button9_Click(object sender, EventArgs e) //”8“
        {

            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "8";
                textBox2.Text = textBox2.Text + "8";
            }
            else { textBox1.Text = "8"; textBox2.Text = "8"; flag = 0; }
        }

        private void button10_Click(object sender, EventArgs e) //”9“
        {

            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + "9";
                textBox2.Text = textBox2.Text + "9";
            }
            else { textBox1.Text = "9"; textBox2.Text = "9"; flag = 0; }
        }

        private void button11_Click(object sender, EventArgs e) //”小數點“
        {
            if (flag == 0)
            {
                textBox1.Text = textBox1.Text + ".";
                textBox2.Text = textBox2.Text + ".";
            }
            else { textBox1.Text = "."; textBox2.Text = "."; flag = 0; }
        }

        private void button26_Click(object sender, EventArgs e)  //”+“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {

                a = Convert.ToDouble(textBox2.Text);
                textBox2.Text = "0";
                textBox1.Text = textBox1.Text + "+";
                i = 1;


        }

        private void button23_Click(object sender, EventArgs e) //”-“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = textBox1.Text + "-";
            i = 2;
        }

        private void button24_Click(object sender, EventArgs e)  //”*“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = textBox1.Text + "*";
            i = 3;
        }

        private void button25_Click(object sender, EventArgs e) //”/“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = textBox1.Text + "/";
            i = 4;
        }

        private void button18_Click(object sender, EventArgs e) //”%“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = textBox1.Text + "%";
            i = 5;
        }

        private void button17_Click(object sender, EventArgs e) //”1/x“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = "1/"+textBox1.Text ;
            i = 6;
        }
        private void button19_Click(object sender, EventArgs e)  //”sqrt“  清除下輸入框的數據  上輸入框繼續記錄全過程
        {
            a = Convert.ToDouble(textBox2.Text);
            textBox2.Text = "0";
            textBox1.Text = "sqrt(" + textBox1.Text+")";
            i = 7;
        }
        private void button15_Click(object sender, EventArgs e) // ”=“  計算式子

        {

            b=Convert.ToDouble(textBox2.Text);

            double s=0;



            switch (i)
            {
                case 0: s = b; break;
                case 1: s = a + b; break;
                case 2: s = a - b; break;
                case 3: s = a * b; break;
                case 4: s = a / b; break;
                case 5: s = a % b; break;
                case 6: s = 1 / a; break;
                case 7: if(m!=0) s =Math.Sqrt(m);     //sqrt  是對一個數計算的 ， 所以當是式子時應該取最後值
                    else s = Math.Sqrt(a);
                    break;

            }
            textBox1.Text = s.ToString();
            textBox2.Text = s.ToString();
            m = s;

            flag = 1;
        }

        private void button27_Click(object sender, EventArgs e)  //取數的負值
        {
           double a=double.Parse(textBox1.Text)*-1;
           textBox1.Text = a.ToString();
           textBox2.Text = a.ToString();
        }

        private void button14_Click(object sender, EventArgs e)  //C   C表示Clear， C則整個的刪除1+2這個計算，你需要重新開始一個計算
        {
            textBox1.Text = "0";
            textBox2.Text = "0";
        }

        private void button13_Click(object sender, EventArgs e) //CE  CE表示Clear Error，比如你輸入1+2之後，按CE會清除第二個參數2，你可以繼續輸入其他數和第一個參數1相加。
        {                                                          //我的想法是相減  textBox1.Text = textBox1.Text - textBox2.Text;
            if (textBox2.Text != "0")
            {
                int n1, n2;
                n2 = textBox2.TextLength - 1;
                n1 = textBox1.TextLength - textBox2.TextLength + 1;

                textBox1.Text = textBox1.Text.Remove(n1, n2);   //用Remove(int n1,int n2),其中n1指索引位置，n2指長度

                textBox2.Text = "0";
            }
        }

        private void button12_Click(object sender, EventArgs e) //”←“   可以清楚一位數
        {
            String a = "";
            for (int i = 0; i < textBox1.TextLength - 1; i++)
            {
                a = a + textBox1.Text[i];
            }
            textBox1.Text = a;
            a = "";
            for (int i = 0; i < textBox2.TextLength - 1; i++)
            {
                a = a + textBox2.Text[i];
            }
            textBox2.Text = a;
        }

        private void button21_Click(object sender, EventArgs e)//MS     MS=Memory Save
        {
            textBox3.Text = "M";
            z = Convert.ToDouble(textBox2.Text);
            flag = 1;
        }

        private void button20_Click(object sender, EventArgs e)//MR    MR=Memory Read
        {
            textBox2.Text = z.ToString();
           textBox1.Text =z.ToString();
                flag = 1;
        }

        private void button16_Click(object sender, EventArgs e)//MC    MC=Memory Clear
        {
            textBox3.Text = "";
            z = 0;
        }

        private void button28_Click(object sender, EventArgs e)//M+    M+=Memory Add
        {
            a = Convert.ToDouble(textBox2.Text);
            z = z + a;
            flag = 1;

        }

        private void button22_Click(object sender, EventArgs e)//M-    M-=Memory Minus
        {
            a = Convert.ToDouble(textBox2.Text);
            z = z - a;
            flag = 1;
        }








    }
}