c# - 标点符号预期错误-c#

Question

我是 c# 的新手。我试着写基本的平均计算器。我得到 60 错误其中大多数

） 预期的

; 预期的

我检查过，但我认为一切都是正确的。我使用 Visual Studio 2010 会有问题吗？

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;

    namespace WindowsFormsApplication3
    {

            public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }

            private void button1_Click(object sender, EventArgs e)
            {
                double a;
                a = ((Convert.ToInt16(textBox1.Text) * 0.4) + (Convert.ToInt16(textBox2.Text) * 0.6));
                if (a >= 50 & a < 60 & Convert.ToInt64(textBox2.Text) >= 50)
                {
                    label4.Text = "Geçti";
                    label5.Text = "CC";
                    textBox3.Text = a.ToString();
                }

                else
                {
                    label4.Text = "KALDI";
                    label5.Text = "FF";
                    textBox3.Text = a.ToString();            
                }

            }



                private void button2_Click_1(object sender, EventArgs e)
                {
                textBox1.Text = "";
                textBox2.Text = "";
                textBox3.Text = "";
                label4.Text = "Durum";
                label5.Text = "Sonuc";
                }


        }



        }

Answer 1

代码中有 HTML 实体，必须将其转换回真实字符。

例如：

if (a >= 50 & a < 60 & Convert.ToInt64(textBox2.Text) >= 50)

应该：

if (a >= 50 & a < 60 & Convert.ToInt64(textBox2.Text) >= 50)

Answer 2

private void button1_Click(object sender, EventArgs e)
{
    double a;
    a = ((Convert.ToInt16(textBox1.Text) * 0.4) + (Convert.ToInt16(textBox2.Text) * 0.6));
    if (a >= 50 && a < 60 && Convert.ToInt64(textBox2.Text) >= 50)
    {
        label4.Text = "Ge&ccedil;ti";
        label5.Text = "CC";
        textBox3.Text = a.ToString();
    }
    else
    {
        label4.Text = "KALDI";
        label5.Text = "FF";
        textBox3.Text = a.ToString();            
    }
}

private void button2_Click_1(object sender, EventArgs e)
{
    textBox1.Text = "";
    textBox2.Text = "";
    textBox3.Text = "";
    label4.Text = "Durum";
    label5.Text = "Sonuc";
}