c#超详细计算器代码(4)

c#简易计算器源代码!

{

if (textBox1.Text == "0" || flag == 1)

{

textBox1.Text = "9"; flag = 0;

}

else

{ textBox1.Text = textBox1.Text + "9"; }

button16.Focus();

}

private void button10_Click(object sender, EventArgs e)

{

if (textBox1.Text == "0." || flag == 1)

{

textBox1.Text = "0"; flag = 0;

}

else

{ textBox1.Text = textBox1.Text + "0"; }

button16.Focus();

}

private void button12_Click(object sender, EventArgs e)

{

flag = 1;

dh = 0;

yscs++;

num2 = Convert.ToDouble(textBox1.Text);

switch (ysf)

{

case 1: textBox1.Text = (num1 + num2).ToString(); break; case 2: textBox1.Text = (num1 - num2).ToString(); break; case 3: textBox1.Text = (num1 * num2).ToString(); break; case 4: if (num2 == 0)

{

MessageBox.Show("分母不能为0");

}

textBox1.Text = (num1 / num2).ToString(); break;

}

ysf = 1;

num1 = Convert.ToDouble(textBox1.Text);

button16.Focus();

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