c#简易计算器源代码!
{
if (textBox1.Text == "0" || flag == 1)
{
textBox1.Text = "1"; flag = 0;
}
else
{ textBox1.Text = textBox1.Text + "1"; }
}
private void button2_Click(object sender, EventArgs e)
{
if (textBox1.Text == "0" || flag == 1)
{
textBox1.Text = "2"; flag = 0;
}
else
{ textBox1.Text = textBox1.Text + "2"; }
button16.Focus();
}
private void button3_Click(object sender, EventArgs e)
{
if (textBox1.Text == "0" || flag == 1)
{
textBox1.Text = "3"; flag = 0;
}
else
{ textBox1.Text = textBox1.Text + "3"; }
button16.Focus();
}
private void button4_Click(object sender, EventArgs e)
{
if (textBox1.Text == "0" || flag == 1)
{
textBox1.Text = "4"; flag = 0;
}
else
{ textBox1.Text = textBox1.Text + "4"; }
button16.Focus();
}
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