简单计算器

char fln; double mumble, temp; #region//数字键 private void button1_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "1"; } private void button2_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "2"; } private void button3_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "3"; } private void button4_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "4"; } private void button5_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "5"; } private void button6_Click(object sender, EventArgs e) { textBox1.Text = textBox1.Text + "6"; } textBox1.Text = textBox1.Text + ".";