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 Cal
{
public partial class Form1 : Form
{
public double num1;
public int temp = 0;
public Form1()
{
InitializeComponent();
}
private void eq_Click(object sender, EventArgs e)
{
switch (temp)
{
case 1:
try
{
result.Text = (num1 + double.Parse(result.Text)).ToString();
}
catch (Exception)
{
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
temp = 0;
}
break;
case 2:
try
{
result.Text = (num1 - double.Parse(result.Text)).ToString();
}
catch (Exception)
{
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
temp = 0;
}
break;
case 3:
try
{
result.Text = (num1 * double.Parse(result.Text)).ToString();
}
catch (Exception)
{
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
temp = 0;
}
break;
case 4:
if (double.Parse(result.Text)==0)
{
MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
result.ResetText();
}
else
{
result.Text = (num1 / double.Parse(result.Text)).ToString(); temp = 0;
}
break;
case 5:
try
{
result.Text = (num1 % double.Parse(result.Text)).ToString();
}
catch (Exception)
{
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally
{
temp = 0;
}
break;
}
}
private void empty_Click(object sender, EventArgs e)
{
result.Text = "0";
num1 = 0;
temp = 0;
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