C#——简易计算器的实现

梦里梦外; 2021-12-10 05:29 366阅读 0赞

### C\#——简易计算器的实现 ###

*  说明
 *  要求
 *  具体实现步骤
 *  运行结果
 *   *  运算 2+3
     *  运算 5\*6
     *  运算 8/3
     *  异常
 *  附

# 说明 #

使用C\#完成一个简易计算器。

# 要求 #

界面  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center]

# 具体实现步骤 #

1.  新建项目![在这里插入图片描述][20190715164128946.png_pic_center]
2.  选择Windows窗体应用，并命名![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 1]
3.  添加控件  
    在工具箱寻找合适的控件，通过属性修改控件名称、大小等属性  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 2]
4.  编写代码  
    PS：双击控件会进入代码编写界面  
    例子：button-数字1

private void btn1_Click(object sender, EventArgs e)
            {
        
                Button btn = (Button)sender;
                TextBox1.Text += btn.Text;
            }

核心代码：

private void btnCalculate_Click(object sender, EventArgs e)
            {
        
                Single r;
                string t = TextBox1.Text;
                int space = t.IndexOf(' ');
                string s1 = t.Substring(0, space);
                char op = Convert.ToChar(t.Substring(space + 1, 1));
                string s2 = t.Substring(space + 3);
                Single arg1 = Convert.ToSingle(s1);
    
                Single arg2 = Convert.ToSingle(s2);
    
                switch (op)
                {
        
                    case '+':
                        r = arg1 + arg2;
                        break;
                    case '-':
                        r = arg1 - arg2;
                        break;
                    case '*':
                        r = arg1 * arg2;
                        break;
                    case '/':
                        if (arg2 == 0)
                        {
        
                            throw new ApplicationException();
                        }
                        else
                        {
        
                            r = arg1 / arg2;
                            break;
                        }
                        break;
                    default:
                        throw new ApplicationException();
                }
                TextBox1.Text = r.ToString();
        }

# 运行结果 #

## 运算 2+3 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 3]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 4]

## 运算 5\*6 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 5]

## 运算 8/3 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 7]

## 异常 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMDM3NzQ2_size_16_color_FFFFFF_t_70_pic_center 8]

# 附 #

完整代码下载地址：  
后续添加

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[20190715164128946.png_pic_center]: /images/20211209/8970e0494e3f47b88e69f857e6faa39a.png
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