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简单计算器，连续加减乘除运算。不过等号做的不完善，等过一次后需重来。
namespace Calcutator
{
public partial class CalculatorForm : Form
{
int pos=0;//标记加减乘除
double showNum1 = 0;//记录运算符前一个数
double showNum2 = 0;//记录运算符后一个数
int pointNum = 0;//标记小数点次数
//标记是否是运算符
int a = 0;
//标记是否是等号
int b = 0;
//判断是否是数字
int c = 0;
double d;
/// <summary>
/// 向显示屏中添加数字
/// </summary>
/// <param name="num"></param>
public void addNum(int num)
{
textNum2.Text = "";
if (textNum.Text == "0")
{
textNum.Clear();
}
if (a == 1)
{
textNum.Text = "";
a = 0;
}
if (b == 1)
{
textNum.Text = "";
b = 0;
}
textNum.Text = textNum.Text Convert.ToString(num);
}
public CalculatorForm()
{
InitializeComponent();
}
private void btnPoint_Click(object sender, EventArgs e)
{
if (pointNum == 0)
{
textNum.Text = textNum.Text ".";
pointNum = 1;
}
else
{
textNum.Text = textNum.Text;
}
}
/// <summary>
/// 加法
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnAdd_Click(object sender, EventArgs e)
{
textNum2.Text = " ";
if (c == 1)
{
pointNum = 0;
//if (b == 1)
//{
//}
//标记是否是运算符
a = 1;
//if (a == 1)
//{
btnEqual.PerformClick();
//}
//获取运算符前显示屏上的数字
showNum1 = Convert.ToDouble(textNum.Text);
//用1表示加法
pos = 1;
c = 0;
}
else
{
pos = 1;
}
}
private void btnEqual_Click(object sender, EventArgs e)
{
if (b != 1)
{
//获取运算符后显示屏上的数字
showNum2 = Convert.ToDouble(textNum.Text);
d = showNum2;
//判断加、减、乘、除
switch (pos)
{
case 1:
textNum.Text = Convert.ToString(showNum1 showNum2);
break;
case 2:
textNum.Text = Convert.ToString(showNum1 - showNum2);
break;
case 3:
textNum.Text = Convert.ToString(showNum1 * showNum2);
break;
case 4:
if (showNum2 == 0)
{
textNum.Text = "除数不能为零！";
}
else
{
textNum.Text = Convert.ToString(showNum1 / showNum2);
}
break;
default:
break;
}
b = 1;
}
else
{
//获取运算符后显示屏上的数字
showNum2 = Convert.ToDouble(textNum.Text);
//判断加、减、乘、除
switch (pos)
{
case 1:
textNum.Text = Convert.ToString(showNum2 d);
break;
case 2:
textNum.Text = Convert.ToString(showNum2-d);
break;
case 3:
textNum.Text = Convert.ToString(showNum2*d);
break;
case 4:
if (showNum2 == 0)
{
textNum.Text = "除数不能为零！";
}
else
{
textNum.Text = Convert.ToString(showNum2/d);
}
break;
default:
break;
}
}
}
private void btnSubtract_Click(object sender, EventArgs e)
{
textNum2.Text = "-";
if (c == 1)
{
pointNum = 0;
//标记是否是运算符
a = 1;
//if (a == 1)
//{
btnEqual.PerformClick();
//}
//获取运算符前显示屏上的数字
showNum1 = Convert.ToDouble(textNum.Text);
//用2表示减法
pos = 2;
c = 0;
}
else
{
pos = 2;
}
}
private void btnMultiply_Click(object sender, EventArgs e)
{
textNum2.Text = "*";
if (c == 1)
{
pointNum = 0;
//标记是否是运算符
a = 1;
//if (a == 1)
//{
btnEqual.PerformClick();
//}
//获取运算符前显示屏上的数字
showNum1 = Convert.ToDouble(textNum.Text);
//用3表示乘法
pos = 3;
c = 0;
}
else
{
pos = 3;
}
}
private void btnDivid_Click(object sender, EventArgs e)
{
textNum2.Text = "/";
if (c == 1)
{
pointNum = 0;
//标记是否是运算符
a = 1;
//if (a == 1)
//{
btnEqual.PerformClick();
//}
//获取运算符前显示屏上的数字
showNum1 = Convert.ToDouble(textNum.Text);
//用4表示除法
pos = 4;
c = 0;
}
else
{
pos = 4;
}
}
private void btnZF_Click(object sender, EventArgs e)
{
if (c == 1)
{
textNum.Text = Convert.ToString(0 - Convert.ToDouble(textNum.Text));
}
}
/// <summary>
/// 清零
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnC_Click(object sender, EventArgs e)
{
textNum.Text = "0";
textNum2.Text = "";
showNum1 = 0;
showNum2 = 0;
pointNum = 0;
pos = 0;
a = 0;
b = 0;
c = 0;
}
private void btnNum1_Click(object sender, EventArgs e)
{
c = 1;
addNum(1);
}
private void btnNum2_Click(object sender, EventArgs e)
{
c = 1;
addNum(2);
}
private void btnNum3_Click(object sender, EventArgs e)
{
c = 1;
addNum(3);
}
private void btnNum4_Click(object sender, EventArgs e)
{
c = 1;
addNum(4);
}
private void btnNum5_Click(object sender, EventArgs e)
{
c = 1;
addNum(5);
}
private void btnNum6_Click(object sender, EventArgs e)
{
c = 1;
addNum(6);
}
private void btnNum7_Click(object sender, EventArgs e)
{
c = 1;
addNum(7);
}
private void btnNum8_Click(object sender, EventArgs e)
{
c = 1;
addNum(8);
}
private void btnNum9_Click(object sender, EventArgs e)
{
c = 1;
addNum(9);
}
private void btnNum0_Click(object sender, EventArgs e)
{
c = 1;
addNum(0);
}
private void textNum2_TextChanged(object sender, EventArgs e)
{
}
private void textNum_TextChanged(object sender, EventArgs e)
{
}
}
}