本文实例为大家分享了C#实现计算器功能的具体代码，供大家参考，具体内容如下
代码：
Random rad = new Random(); // 实例化随机对象
private void Form1_Load(object sender, EventArgs e)
{
this.Left = Screen.PrimaryScreen.WorkingArea.Width / 2 - this.Width / 2;
this.Top = Screen.PrimaryScreen.WorkingArea.Height / 2 - this.Height / 2;
this.Text = "计算器";
textBox1.ReadOnly =true;// 文本框无法输入字符
foreach (Control ctl in this.Controls)
{ // 获取所有按钮 改变背景颜色和数字和符号颜色
if (ctl is Button)
{
Button btn = ctl as Button;
btn.BackColor = Color.FromArgb(rad.Next(256),rad.Next(256),rad.Next(256),rad.Next(256));
btn.ForeColor = Color.FromArgb(rad.Next(256), rad.Next(256), rad.Next(256));
}
}
}
private void 关闭ToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();// 关闭窗体
}
char fuhao;// 接收符号
double temp, num; // temp第一个值，num为第二个值
// 1
private void button1_Click(object sender, EventArgs e)
{
textBox1.Text += "1";
}
// 2
private void button2_Click(object sender, EventArgs e)
{
textBox1.Text += "2";
}
// 3
private void button3_Click(object sender, EventArgs e)
{
textBox1.Text += "3";
}
// 4
private void button5_Click(object sender, EventArgs e)
{
textBox1.Text += "4";
}
// 5
private void button6_Click(object sender, EventArgs e)
{
textBox1.Text += "5";
}
// 6
private void button7_Click(object sender, EventArgs e)
{
textBox1.Text += "6";
}
// 7
private void button9_Click(object sender, EventArgs e)
{
textBox1.Text += "7";
}
// 8
private void button10_Click(object sender, EventArgs e)
{
textBox1.Text += "8";
}
// 9
private void button11_Click(object sender, EventArgs e)
{
textBox1.Text += "9";
}
// 0
private void button15_Click(object sender, EventArgs e)
{
textBox1.Text += "0";
}
//点
private void button16_Click(object sender, EventArgs e)
{
textBox1.Text += ".";
}
// +
private void button4_Click(object sender, EventArgs e)
{
num = double.Parse(textBox1.Text);
fuhao = '+';
textBox1.Text += "+";
//textBox1.Text = null;
}
// -
private void button8_Click(object sender, EventArgs e)
{
num = double.Parse(textBox1.Text);
fuhao = '-';
textBox1.Text = null;
}
// ×
private void button12_Click(object sender, EventArgs e)
{
num = double.Parse(textBox1.Text);
fuhao = '×';
textBox1.Text = null;
}
// ÷
private void button20_Click(object sender, EventArgs e)
{
num = double.Parse(textBox1.Text);
fuhao = '÷';
textBox1.Text = null;
}
// %
private void button19_Click(object sender, EventArgs e)
{
num = double.Parse(textBox1.Text);
fuhao = '%';
textBox1.Text = null;
}
// =
private void button13_Click(object sender, EventArgs e)
{
temp = double.Parse(textBox1.Text);
switch (fuhao)
{
case '+':
num += temp;
break;
case '-':
num -= temp;
break;
case '×':
num *= temp;
break;
case '÷':
num /= temp;
break;
case '%':
num %= temp;
break;
default:
break;
}
textBox1.Text = num.ToString();
fuhao = ' ';
num = 0;
temp = 0;
}
// 删除
private void button18_Click(object sender, EventArgs e)
{
if (textBox1.Text.Length > 0)
{
textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);
}
}
//清空
private void button17_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
