C#简单的写一个计算器

初学者,想编一个简单的计算器,基础不够扎实,不能灵活的运气变量,常量,还有我这里应该还需要转换数据类型,大侠们谁帮我 在我的基础上写完这个计算器

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 WindowsFormsApplication5
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void textBox1_TextChanged(object sender, EventArgs e)
    {

    }

    private void button14_Click(object sender, EventArgs e)
    {
         textBox1.Text =textBox1.Text+bnt1.Text;

    }

    private void button13_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt2.Text;
    }

    private void button12_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt3.Text;
    }

    private void button10_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt4.Text;
    }

    private void button9_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt5.Text;
    }

    private void button8_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt6.Text;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt7.Text;
    }

    private void button2_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt8.Text;
    }

    private void button3_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt9.Text;
    }

    private void button5_Click(object sender, EventArgs e)
    {
        textBox1.Text = "";
    }

    private void button15_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt0.Text;
    }

    private void button16_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text + bnt.Text;
    }

    private void button4_Click(object sender, EventArgs e)
    {

    }

    private void button17_Click(object sender, EventArgs e)
    {

    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }
}

}

http://blog.csdn.net/xianfajushi/article/details/40684551

写完?你具体的需求是什么?怎么才叫写完?建议你自己写,有具体的问题再来问。

问题是你什么都没写,无非就是画了几个数字按钮而已。而且写的都是废话,实际上,你只要一个事件处理函数就可以了。用sender区别是哪个按钮。
在你基础上继续,不如建议你找一个现成的:
参考

第一:这种简单的计算器没有思维难度!
第二:你需要多敲代码!
所以你自己可以搞定!没必要来问!