C#實現簡單的計算器

功能描述：只實現加減法

C#不放設計圖就是耍流氓啦

【myform.cs】
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 實驗一
{
     
    public partial class Myform : Form
    {
        //不加的話會報錯
        public static void Main(string[] args)
        {
            // Starts the application.
            Application.Run(new Myform());//FormXXX是你定義的窗口類
        }

        public static List<char> inputStr = new List<char>(1000);    //用戶的輸入
        public Myform()
        {
            InitializeComponent();
                 
        }

        private void button12_Click(object sender, EventArgs e)
        {
            //等號代碼

            textBox1.AppendText("=");

            //textBox1.Text = textBox1.Text;

            textBox1.Text = DataOp.DataMain();

            string temp = DataOp.DataMain();

            inputStr.Clear();

            for (int i = 0; i < temp.Length; i++)
            {
                inputStr.Add(temp[i]);
            }
        }
        private void button13_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            inputStr.Clear(); //清空鏈表的所有元素
        }
        private void button1_Click_1(object sender, EventArgs e)
        {
            inputStr.Add('1');
            textBox1.AppendText("1");

        }
        private void button2_Click(object sender, EventArgs e)
        {
            inputStr.Add('2');
            textBox1.AppendText("2");
        }
        private void button10_Click(object sender, EventArgs e)
        {
            inputStr.Add('+');
            textBox1.AppendText("+");
        }
        private void button11_Click(object sender, EventArgs e)
        {
            inputStr.Add('-');
            textBox1.AppendText("-");
        }
        private void button3_Click(object sender, EventArgs e)
        {
            inputStr.Add('3');
            textBox1.AppendText("3");
        }
        private void button4_Click(object sender, EventArgs e)
        {
            inputStr.Add('4');
            textBox1.AppendText("4");
        }
        private void button5_Click(object sender, EventArgs e)
        {
            inputStr.Add('5');
            textBox1.AppendText("5");
        }
        private void button6_Click(object sender, EventArgs e)
        {
            inputStr.Add('6');
            textBox1.AppendText("6");
        }
        private void button7_Click(object sender, EventArgs e)
        {
            inputStr.Add('7');
            textBox1.AppendText("7");
        }
        private void button8_Click(object sender, EventArgs e)
        {
            inputStr.Add('8');
            textBox1.AppendText("8");
        }
        private void button9_Click(object sender, EventArgs e)
        {
            inputStr.Add('9');
            textBox1.AppendText("9");
        }
        private void button13_Click_1(object sender, EventArgs e)
        {
            inputStr.Add('0');
            textBox1.AppendText("0");
        }


    }
}
【program.cs】
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 實驗一
{
    
    class DataOp : Myform
    {
        static Stack<int> m = new Stack<int>();//數字棧,數字類型爲int
        static Stack<char> s = new Stack<char>();//符號棧
        public static void Read()   //Read()從inputStr輸入流中讀值
        {
            for (int i = 0; i < inputStr.Count; i++)
            {
                if (!IsOperator(inputStr[i]))   //數字
                {
                    string s = null;
                    while (i < inputStr.Count && !IsOperator(inputStr[i]))
                    {
                        s += inputStr[i];
                        i++;
                    }
                    i--;
                    int mm = Convert.ToInt16(s);
                    m.Push(mm);
                }
                else if (IsOper(inputStr[i]))   //+ - * / 
                {
                    if (s.Count.Equals(0))
                    {
                        s.Push(inputStr[i]);
                    }

                    else
                    {
                        int n1, n2;
                        char s1;
                        n2 = m.Pop();
                        n1 = m.Pop();
                        s1 = s.Pop();
                        int sum = Operat(n1, n2, s1);
                        m.Push(sum);
                        s.Push(inputStr[i]);
                    }
                }

            }
        }


        public static int PopStack()
        {
            int sum = 0;
            while (s.Count != 0)
            {
                int n1, n2;
                char s1;
                n2 = m.Pop();
                n1 = m.Pop();
                
                s1= s.Pop();
                sum = Operat(n1, n2, s1);
                m.Push(sum);
            }
            return sum;
        }
        public static bool IsOperator(char c)   //是否是操作符
        {
            if (c.Equals('+') || c.Equals('-'))
                return true;
            return false;
        }
        public static bool IsOper(char c)   //是否是運算符符
        {
            if (c.Equals('+') || c.Equals('-'))
                return true;
            return false;
        }
       
        public static int Operat(int n1, int n2, char s1)
        {
            int sum = 0;
            switch (s1)
            {
                case '+': sum = n1 + n2; break;
                case '-': sum = n1 - n2; break;

            }
            return sum;
        }
        public static string DataMain()
        {
            Read();
            return PopStack().ToString();
        } 
    }
}

PS：應付實驗課，之前沒學過照着其他大佬的寫的 ……入門的可以參考