C# 如何调试C中的“}预期错误”？

这是我在课堂上编写的代码。我在virtual studio 2015中创建了该代码，它出现了2}个预期错误，一个在第31行末尾，另一个在第38行末尾

我是C新手，需要一些帮助来解释为什么我的代码无法运行，并且出现了预期的错误

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MultiConversion
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("this program can convert between units in different settings like currency, speed, and weight");
            //define vars
            double miles, kilometers, pounds, kilograms, euros, dollars;
            Int16 number, first, second, third;
            //get user input
            Console.WriteLine("please choose what you want to convert and enter the number associated with it 1speed, 2weight, 3currency.");
            number = Convert.ToInt16(Console.ReadLine());
            if (number == 1)
            { { {   //speed conversion
                        Console.WriteLine("you have chosen to convert speed between miles and kilometers");
                        Console.WriteLine("which would you like to convert from 1miles, or 2kilometers ?");
                        first = Convert.ToInt16(Console.ReadLine());
                        if (first == 1)
                            Console.Write("enter miles: ");
                        miles = Convert.ToDouble(Console.ReadLine());
                        kilometers = miles * 1.60934;

                        Console.WriteLine("your speed in kilometers per hour is" + kilometers + "per hour");
                    }
            else 
                    {
                        Console.Write("enter kilometers: ");
                        kilometers = Convert.ToDouble(Console.ReadLine());
                        miles = kilometers * .621;

                        Console.WriteLine("your speed in miles per hour is" + miles + "per hour"); } }
            else 
                if (number == 2)
                { {  //weight conversion
                        Console.WriteLine("you have chosen to convert weight between US pounds and kilograms");
                        Console.WriteLine("which would you like to convert from 1pounds, or 2kilograms ?");
                        second = Convert.ToInt16(Console.ReadLine()); }
                    if (second == 1)
                    {
                        Console.Write("enter pounds: ");
                        pounds = Convert.ToDouble(Console.ReadLine());
                        kilograms = pounds * 2.20462;

                        Console.WriteLine("your weight in kilograms is" + kilograms + "."); }
                    else
                    {
                        Console.Write("enter kilograms: ");
                        kilograms = Convert.ToDouble(Console.ReadLine());
                        pounds = kilograms * .453592;

                        Console.WriteLine("your weight in pounds is" + pounds + "."); } }
                else
                {
                    {  //currency conversion.
                        Console.WriteLine("you have chosen to convert currency between dollars and euros using the conversion factors as of 9 - 9 - 16");
                        Console.WriteLine("which would you like to convert from 1dollars, or 2euros ?");
                        third = Convert.ToInt16(Console.ReadLine());
                    }
                    if (third == 1)
                    {
                        Console.Write("enter dollars");
                        dollars = Convert.ToDouble(Console.ReadLine());
                        euros = dollars * .89;
                        Console.WriteLine("your" + dollars + "dollars is equal to " + euros + "euros."); }
                    else
                    {
                        Console.Write("enter euros");
                        euros = Convert.ToDouble(Console.ReadLine());
                        dollars = euros * 1.12;
                        Console.WriteLine("your" + euros + "euros is equal to " + dollars + "dollars."); } } }
            Console.WriteLine("thank you and I hope you converted all that you need to.");
            Console.ReadKey();

        }
    }
}

简单的{错误

试试这个

 static void Main(string[] args)
        {
            Console.WriteLine("this program can convert between units in different settings like currency, speed, and weight");
            //define vars
            double miles, kilometers, pounds, kilograms, euros, dollars;
            Int16 number, first, second, third;
            //get user input
            Console.WriteLine("please choose what you want to convert and enter the number associated with it 1speed, 2weight, 3currency.");
            number = Convert.ToInt16(Console.ReadLine());
            if (number == 1)
            {   //speed conversion
                Console.WriteLine("you have chosen to convert speed between miles and kilometers");
                Console.WriteLine("which would you like to convert from 1miles, or 2kilometers ?");
                first = Convert.ToInt16(Console.ReadLine());
                if (first == 1)
                    Console.Write("enter miles: ");
                miles = Convert.ToDouble(Console.ReadLine());
                kilometers = miles * 1.60934;

                Console.WriteLine("your speed in kilometers per hour is" + kilometers + "per hour");
            }
            else
            {
                Console.Write("enter kilometers: ");
                kilometers = Convert.ToDouble(Console.ReadLine());
                miles = kilometers * .621;

                Console.WriteLine("your speed in miles per hour is" + miles + "per hour");
            }
           if (number == 2)
            {
                //weight conversion
                Console.WriteLine("you have chosen to convert weight between US pounds and kilograms");
                Console.WriteLine("which would you like to convert from 1pounds, or 2kilograms ?");
                second = Convert.ToInt16(Console.ReadLine());

                if (second == 1)
                {
                    Console.Write("enter pounds: ");
                    pounds = Convert.ToDouble(Console.ReadLine());
                    kilograms = pounds * 2.20462;

                    Console.WriteLine("your weight in kilograms is" + kilograms + ".");
                }
                else
                {
                    Console.Write("enter kilograms: ");
                    kilograms = Convert.ToDouble(Console.ReadLine());
                    pounds = kilograms * .453592;

                    Console.WriteLine("your weight in pounds is" + pounds + ".");
                }
            }
            else
            {
                {  //currency conversion.
                    Console.WriteLine("you have chosen to convert currency between dollars and euros using the conversion factors as of 9 - 9 - 16");
                    Console.WriteLine("which would you like to convert from 1dollars, or 2euros ?");
                    third = Convert.ToInt16(Console.ReadLine());
                }
                if (third == 1)
                {
                    Console.Write("enter dollars");
                    dollars = Convert.ToDouble(Console.ReadLine());
                    euros = dollars * .89;
                    Console.WriteLine("your" + dollars + "dollars is equal to " + euros + "euros.");
                }
                else
                {
                    Console.Write("enter euros");
                    euros = Convert.ToDouble(Console.ReadLine());
                    dollars = euros * 1.12;
                    Console.WriteLine("your" + euros + "euros is equal to " + dollars + "dollars.");
                }
            }

            Console.WriteLine("thank you and I hope you converted all that you need to.");
            Console.ReadKey();
        }

---

希望有帮助，

好吧，编译器似乎在准确地告诉您错误所在。具体来说，您在理解什么方面有困难？我建议您停止在同一行上放置多个大括号，并遵循.NET惯例，为每个大括号指定自己的行。确认匹配的大括号和缩进将更加容易用这种方式来解释代码的实际阻塞。但至少，当编译器告诉您它需要大括号字符时，您应该能够理解它的含义。