自己动手写计算器V1.2

来源：互联网发布：php svn 发布系统编辑：程序博客网时间：2024/04/30 10:51

1.2版本主要添加了分数、取负、开方三个功能，由于这三中运算输入单目运算，所以，新声明了一个新类

　　class OPeratorV1_2

至此基本完成了一个标准计算器，至于拥有更多功能的科学计算器，日后再做开发，暂定版本2.0

代码如下：

自己写的操作类，负责各种运算，由于是利用了工厂模式，以后新增功能会很方便，特别是今天添加上面的三个功能时，深深体会到了模式的好处。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace 计算器{    //简述：用工厂模式取代了简单工厂模式，对比与简单工厂模式，工厂模式，将简单工厂类中的逻辑判断利用接口分离了开来。    interface Result    {        OperatorV1_1 getOperatorV1_1();    }    class plusOperatorV1_1Factory:Result    {        public OperatorV1_1 getOperatorV1_1()        {            return new plusOperatorV1_1();        }    }    class jianOperatorV1_1Factory:Result    {        public OperatorV1_1 getOperatorV1_1()        {            return new jianOperatorV1_1();        }    }    class chenOperatorV1_1Factory:Result    {        public OperatorV1_1 getOperatorV1_1()        {            return new chenOperatorV1_1();        }    }    class chuOperatorV1_1Factory:Result    {        public OperatorV1_1 getOperatorV1_1()        {            return new chenOperatorV1_1();        }    }    class OperatorV1_1    {        public virtual string GetResult(double num1, double num2)        {            return "error";        }    }    //负责开方、分数、取负    class OPeratorV1_2    {        public virtual string GetResult(double num)        {            return "error";        }    }    //开方    class kaiFangOperatorV1_2:OPeratorV1_2    {        public override string GetResult(double num)        {                    num = Math.Sqrt(num);                return num.ToString();         }    }    //分数    class fenShuOperatorV1_2 : OPeratorV1_2    {        public override string GetResult(double num)        {            num = 1 / num;            return num.ToString();        }    }     //取负    class quFuOperatorV1_2:OPeratorV1_2    {        public override string GetResult(double num)        {            num = -num;            return num.ToString();        }    }    class plusOperatorV1_1 : OperatorV1_1    {        public override string GetResult(double num1, double num2)        {            return (num1 + num2).ToString();        }    }    class jianOperatorV1_1 : OperatorV1_1    {        public override string GetResult(double num1, double num2)        {            return (num1 - num2).ToString();        }    }    class chenOperatorV1_1 : OperatorV1_1    {        public override string GetResult(double num1, double num2)        {            return (num1 * num2).ToString();        }    }    class chuOperatorV1_1 : OperatorV1_1    {        public override string GetResult(double num1, double num2)        {            if (num2 == 0)            {                return "除数不能为0";            }            else            {                return (num1 / num2).ToString();            }        }    }}

后台控件代码：

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 计算器{    //public class Check    //{    //    public void CheckTextbox(string num)    //    {    //        StringBuilder str = new StringBuilder();    //        if (this.textBox1.Text != "")    //        {    //            str.Append(this.textBox1.Text);    //            str.Append(num);    //            this.textBox1.Text = str.ToString();    //        }    //        else    //        {    //            this.textBox1.Text = num;    //        }    //    }    //    public void CheckYunSuan(string myOperator)    //    {    //        StringBuilder str = new StringBuilder();    //        if (this.textBox1.Text != "")    //        {    //            str.Append(this.textBox1.Text);    //            str.Append(myOperator);    //            this.textBox1.Text = str.ToString();    //        }    //        else    //        {    //            this.textBox1.Text = myOperator;    //        }    //    }    //}    public partial class Form1 : Form    {        //简述：变量集中声明处        StringBuilder num1 = new StringBuilder();        StringBuilder num2 = new StringBuilder();        public void CheckTextbox(string num)        {            StringBuilder str = new StringBuilder();            if (this.textBox1.Text != "" && this.textBox1.Text != "非数字" && this.textBox1.Text != "参数错误")//当为负数开方时，会报错“非数字”。当连续点击运算符时，会导致运算参数不完整，会报“参数错误”            {                str.Append(this.textBox1.Text);                str.Append(num);                this.textBox1.Text = str.ToString();            }            else            {                this.textBox1.Text = num;            }        }        //简述：输入运算符。 2016-5-13 张杨        public void CheckYunSuan(string myOperator)        {            StringBuilder str = new StringBuilder();            string sText = this.textBox1.Text;            if (this.textBox1.Text != "")            {                string s = this.textBox1.Text;                if (textBox1.Text.Contains("+") || s[0] != '-' && textBox1.Text.Contains("-") || textBox1.Text.Contains("*") || textBox1.Text.Contains("/"))                {                    ShowResult();                }                else if (myOperator == "Q" || myOperator == "F" || myOperator == "K")                {                    ShowResult(myOperator);                }                str.Append(this.textBox1.Text);                //后面的两个判断主要是因为如果出现错误的话，就要避免此种情况下在错误信息上添加运算符的情况。                if (myOperator != "Q" && myOperator != "F" && myOperator != "K"&&!this.textBox1.Text.Contains("参数错误")&&!this.textBox1.Text.Contains("非数字"))                {                    str.Append(myOperator);                }                if(sText==str.ToString())//判定是否执行过相关运算                {                    this.textBox1.Text = "参数错误";                }                else                {                    this.textBox1.Text = str.ToString();                }                           }            else            {                this.textBox1.Text = myOperator;            }        }        public Form1()        {            InitializeComponent();        }        //简述：判断是否是计算完毕后的再次点击。  2016-5-13 张杨        //修改：废除。 2016-5-13 张杨        //private void textboxIsNull()        //{        //    if (this.textBox1.Text.Contains("结果为"))        //    {        //        this.textBox1.Text = "";        //    }        //}        #region 数字类        private void button1_Click(object sender, EventArgs e)        {            CheckTextbox("1");        }        private void button2_Click(object sender, EventArgs e)        {            CheckTextbox("2");        }        private void button3_Click(object sender, EventArgs e)        {            CheckTextbox("3");        }        private void button4_Click(object sender, EventArgs e)        {            CheckTextbox("4");        }        private void button5_Click(object sender, EventArgs e)        {            CheckTextbox("5");        }        private void button6_Click(object sender, EventArgs e)        {            CheckTextbox("6");        }        private void button7_Click(object sender, EventArgs e)        {            CheckTextbox("7");        }        private void button8_Click(object sender, EventArgs e)        {            CheckTextbox("8");        }        private void button9_Click(object sender, EventArgs e)        {            CheckTextbox("9");        }        #endregion        #region 加减乘除运算        //简述：下面的为加减乘除功能。        //2016-5-13 张杨        private void button10_Click(object sender, EventArgs e)        {            CheckYunSuan("+");        }        private void button11_Click(object sender, EventArgs e)        {            CheckYunSuan("-");        }        private void button12_Click(object sender, EventArgs e)        {            CheckYunSuan("*");        }        private void button13_Click(object sender, EventArgs e)        {            CheckYunSuan("/");        }        #endregion        private void button14_Click(object sender, EventArgs e)        {            this.textBox1.Text = String.Empty;        }        //简述：判断字符是否为运算符。 2016-5-13  张杨        public bool isOperator(char key)        {            if (key == '+' || key == '-' || key == '*' || key == '/')            {                return true;            }            else            {                return false;            }        }        //简述：计算结果。  2016-5-13    张杨        private void ShowResult(string Operator = "")        {            string strText = this.textBox1.Text;            char myOperator = 'A';            if (Operator != "")            {                myOperator = Operator[0];            }            int flag = 0;            string result = "";            OperatorV1_1 newResult = new OperatorV1_1();            //取负、分数、开方的运算对象            OPeratorV1_2 newResult2 = new OPeratorV1_2();            if (strText[0] == '-')//针对为多位负数开方的情况。            {                num1.Append('-');            }            foreach (char key in strText)            {                if (strText[0] == key && key == '-')                {                    continue;                }                if (isOperator(key))                {                    flag = 1;                    myOperator = key;                    continue;                }                else                {                    switch (flag)                    {                        case 0:                            num1.Append(key);                            break;                        case 1: num2.Append(key); break;                    }                }            }            switch (myOperator)            {                case '+': newResult = new plusOperatorV1_1(); break;                case '-': newResult = new jianOperatorV1_1(); break;                case '*': newResult = new chenOperatorV1_1(); break;                case '/': newResult = new chuOperatorV1_1(); break;                case 'Q': newResult2 = new quFuOperatorV1_2(); break;                case 'K': newResult2 = new kaiFangOperatorV1_2(); break;                case 'F': newResult2 = new fenShuOperatorV1_2(); break;            }            if (myOperator == 'Q' || myOperator == 'K' || myOperator == 'F')            {                if (num1.ToString() != null)                {                    result = newResult2.GetResult(double.Parse(num1.ToString()));                }                else                {                    result = "参数错误";                }            }            else            {                string s1 = num1.ToString();                string s2 = num2.ToString();                if (s1.Length>0&& s2.Length>0)                {                    if (!isOperator(s1[0]) && !isOperator(s2[0]))                        result = newResult.GetResult(double.Parse(num1.ToString()), double.Parse(num2.ToString()));                }                else                {                    result = "参数错误";                }            }            //result = OperatorFactory.GetResult(myOperator, double.Parse(num1.ToString()), double.Parse(num2.ToString()));            num1 = num1.Remove(0, num1.Length);            num2 = num2.Remove(0, num2.Length);            this.textBox1.Text = result;        }        private void button15_Click(object sender, EventArgs e)        {            ShowResult();        }        #region 取负，分数，开方        //开方        private void button16_Click(object sender, EventArgs e)        {            string s = this.textBox1.Text;            if (textBox1.Text.Contains("+") || s[0] != '-' && textBox1.Text.Contains("-") || textBox1.Text.Contains("*") || textBox1.Text.Contains("/"))            {                ShowResult();            }            CheckYunSuan("K");        }        //分数        private void button17_Click(object sender, EventArgs e)        {            string s = this.textBox1.Text;            if (textBox1.Text.Contains("+") || s[0] != '-' && textBox1.Text.Contains("-") || textBox1.Text.Contains("*") || textBox1.Text.Contains("/"))            {                ShowResult();            }            CheckYunSuan("F");        }        //取负        private void button18_Click(object sender, EventArgs e)        {            string s = this.textBox1.Text;            if (textBox1.Text.Contains("+") || s[0] != '-' && textBox1.Text.Contains("-") || textBox1.Text.Contains("*") || textBox1.Text.Contains("/"))            {                ShowResult();            }            CheckYunSuan("Q");        }        #endregion    }}

控件设计形式：

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