C#实现计算器
最终效果图：
编辑器：Visual Studio 2022
具体步骤：
1、创建窗体应用
2、拖拽公共组件 label
并且 修改 字体
（name）labelout
font 宋体 常规 一号
Text 0
textalign BottomRight
autoSize false （可以任意拖拽大小 位置）
3、复制窗体1
（name）labelbefore
font 宋体 常规 二号
4、复制窗体2 最上面的
（name）labelmode
然后将 第一行 第二行 的 text 文本0 置空
5、拖拽公共组件button
（name）num1
text 1
然后复制 将对应的name text 改成对应的数字
6、双击数字 添加对应数字的点击事件（运行 保存完 双击才能加事件 ）
7、选中数字，点击工具箱中的公共组件 指针 复制 按钮
Text 改为 清除
name clean
双击清除 添加事件
number = 0;
label2.Text = Convert.ToString(number);
8、复制 清除按钮 添加 加减乘除，并且双击添加事件
plus +
minus -
multiplication *
division /
9、添加事件
double number = 0, number2 = 0;
int inputNumber;
enum Operator { none,plus,minus,multiplication,divsion }
Operator mode = Operator.none;
bool ismode = false;
public void calll(int an)
{
if (ismode == false) {
number = number * 10 + an;
label2.Text = Convert.ToString(number);
}
else
{
number2 = number2 * 10 + an;
label2.Text = Convert.ToString(number2);
}
}
inputNumber = 1;
calll(inputNumber);
10、添加 等于号 equal
text =
name equal
定义变量
添加事件
源代码：
namespace call
{
public partial class labelout : Form
{
double number = 0, number2 = 0, result;
int inputNumber;
enum Operator { none,plus,minus,multiplication,divsion }
Operator mode = Operator.none;
bool isequal = false;
public void calll(int an)
{
if (mode == Operator.none) {
number = number * 10 + an;
label2.Text = Convert.ToString(number);
}
else
{
number2 = number2 * 10 + an;
label2.Text = Convert.ToString(number2);
}
}
public labelout()
{
InitializeComponent();
}
private void num1_Click(object sender, EventArgs e)
{
inputNumber = 1;
calll(inputNumber);
}
private void num2_Click(object sender, EventArgs e)
{
inputNumber = 2;
calll(inputNumber);
}
private void num3_Click(object sender, EventArgs e)
{
inputNumber = 3;
calll(inputNumber);
}
private void num4_Click(object sender, EventArgs e)
{
inputNumber = 4;
calll(inputNumber);
}
private void num5_Click(object sender, EventArgs e)
{
inputNumber = 5;
calll(inputNumber);
}
private void num6_Click(object sender, EventArgs e)
{
inputNumber = 6;
calll(inputNumber);
}
private void num7_Click(object sender, EventArgs e)
{
inputNumber = 7;
calll(inputNumber);
}
private void num8_Click(object sender, EventArgs e)
{
inputNumber = 8;
calll(inputNumber);
}
private void num9_Click(object sender, EventArgs e)
{
inputNumber = 9;
calll(inputNumber);
}
private void num0_Click(object sender, EventArgs e)
{
inputNumber = 0;
calll(inputNumber);
}
private void clean_Click(object sender, EventArgs e)
{
//清除
//第一次代码
//number = 0;
//label2.Text = Convert.ToString(number);
//第二次代码
cleanall();
}
private void minus_Click(object sender, EventArgs e)
{
// -
mode = Operator.minus;
switchmode();
}
private void plus_Click(object sender, EventArgs e)
{
// +
mode = Operator.plus;
switchmode();
}
private void multiplication_Click(object sender, EventArgs e)
{
// *
mode = Operator.multiplication;
switchmode();
}
private void equal_Click(object sender, EventArgs e)
{
//等于
switch (mode)
{
case Operator.plus:
result = number + number2;
break;
case Operator.minus:
result = number - number2;
break;
case Operator.multiplication:
result = number * number2;
break;
case Operator.divsion:
result = number / number2;
break;
}
number = 0;
number2= 0;
isequal = true;
labelbefore.Text = "";
labelmode.Text = "";
label2.Text = Convert.ToString(result);
}
private void division_Click(object sender, EventArgs e)
{
// /
mode = Operator.divsion;
switchmode();
}
//清空
public void cleanall()
{
number = 0;
number2 = 0;
label2.Text = Convert.ToString(number);
labelbefore.Text = "";
labelmode.Text = "";
isequal = false;
mode = Operator.none;
}
//
public void switchmode()
{
switch (mode)
{
case Operator.plus:
labelmode.Text = "+";
break;
case Operator.minus:
labelmode.Text = "-";
break;
case Operator.multiplication:
labelmode.Text = "*";
break;
case Operator.divsion:
labelmode.Text = "/";
break;
}
if (isequal == true)
{
number = result;
}
labelbefore.Text = Convert.ToString(number);
label2.Text = Convert.ToString(number2);
}
}
}
namespace call
{
partial class labelout
{
///