null problem | C# Online Compiler

null problem by Anonymous

using System;
using System.Collections.Generic;
using System.Linq;
					
public class Program
{
	public class Book
	{
		public int Id {get; set;}
		public string Name {get; set;}
		public decimal Price {get; set;}
	}
	
	public static void Main()
	{
		List<Book> books = new()
		{
			new Book
			{
				Id = 1,
				Name = "AA",
				Price = 19.0000M
			},
			new Book
			{
				Id = 2,
				Name= "BB",
				Price = 18.0000M
			},
			new Book
			{
				Id = 3,
				Name = "CC",
				Price = 30.0000M
			},
			new Book
			{
				Id = 4,
				Name = "DD",
				Price = 9.0000M,
			},
		};
		
		List<(decimal Category, List<Book> Books)> groupedBooks = books
			.GroupBy(book => Math.Ceiling(book.Price / 10) * 10,
				(category, booksInCategory) => ( 
					Category: category, 
					Books: booksInCategory.ToList() ))
			.OrderBy(gr => gr.Category)
			.ToList();
		
		foreach (var gr in groupedBooks)
		{
			Console.WriteLine($"Category: {gr.Category}");
			
			foreach (var book in gr.Books)
			{
				Console.WriteLine($"\tBook: {{ Id: {book.Id}\tName: {book.Name}\tPrice: {book.Price} }}");
			}
			
			Console.WriteLine();
		}
	}
}

 
using System;
using System.Collections.Generic;
using System.Linq;
                    
public class Program
{
    public class Book
    {
        public int Id {get; set;}
        public string Name {get; set;}
        public decimal Price {get; set;}
    }
    
    public static void Main()
    {
        List<Book> books = new()
        {
            new Book
            {
                Id = 1,
                Name = "AA",
                Price = 19.0000M
            },
            new Book
            {
                Id = 2,
                Name= "BB",
                Price = 18.0000M
            },
            new Book
            {
                Id = 3,
                Name = "CC",
                Price = 30.0000M
            },
            new Book
            {
                Id = 4,
                Name = "DD",
                Price = 9.0000M,
            },
        };
        
        List<(decimal Category, List<Book> Books)> groupedBooks = books
            .GroupBy(book => Math.Ceiling(book.Price / 10) * 10,
                (category, booksInCategory) => ( 
                    Category: category, 
                    Books: booksInCategory.ToList() ))
            .OrderBy(gr => gr.Category)
            .ToList();
        
        foreach (var gr in groupedBooks)
        {
            Console.WriteLine($"Category: {gr.Category}");
            
            foreach (var book in gr.Books)
            {
                Console.WriteLine($"\tBook: {{ Id: {book.Id}\tName: {book.Name}\tPrice: {book.Price} }}");
            }
            
            Console.WriteLine();
        }
    }
}

  OS

---------------------

int Data_1;
float Data_2;

double Data_3 = 3;

int main(int a, int b, float X, double Y2)
{
    int    Data_A;
    double Data_B = 25.45;

    if(x > y)
        if(x < y)
            int a = b;
        else
            int a = c;

    return 0;
};

void f1(void)
{
    int a = 5;

goto Lb_1;
    return;
};

------------------

      TOKEN LIST:

   TYPE         VALUE

BuildInType     "int"
Identifier      "Data_1"
Punctuator      ";"
BuildInType     "float"
Identifier      "Data_2"
Punctuator      ";"
BuildInType     "double"
Identifier      "Data_3"
Operation       "="
Number          "3"
Punctuator      ";"
BuildInType     "int"
Identifier      "main"
Punctuator      "("
BuildInType     "int"
Identifier      "a"
Punctuator      ","
BuildInType     "int"
Identifier      "b"
Punctuator      ","
BuildInType     "float"
Identifier      "X"
Punctuator      ","
BuildInType     "double"
Identifier      "Y2"
Punctuator      ")"
Punctuator      "{"
BuildInType     "int"
Identifier      "Data_A"
Punctuator      ";"
BuildInType     "double"
Identifier      "Data_B"
Operation       "="
Number          "25.45"
Punctuator      ";"
ControlKeyWord  "if"
Punctuator      "("
Identifier      "x"
Operation       ">"
Identifier      "y"
Punctuator      ")"
ControlKeyWord  "if"
Punctuator      "("
Identifier      "x"
Operation       "<"
Identifier      "y"
Punctuator      ")"
BuildInType     "int"
Identifier      "a"
Operation       "="
Identifier      "b"
Punctuator      ";"
ControlKeyWord  "else"
BuildInType     "int"
Identifier      "a"
Operation       "="
Identifier      "c"
Punctuator      ";"
ControlKeyWord  "return"
Number          "0"
Punctuator      ";"
Punctuator      "}"
Punctuator      ";"
BuildInType     "void"
Identifier      "f1"
Punctuator      "("
BuildInType     "void"
Punctuator      ")"
Punctuator      "{"
BuildInType     "int"
Identifier      "a"
Operation       "="
Number          "5"
Punctuator      ";"
ControlKeyWord  "goto"
Identifier      "Lb_1"
Punctuator      ";"
ControlKeyWord  "return"
Punctuator      ";"
Punctuator      "}"
Punctuator      ";"
EOF             ""

int Data_1;
float Data_2;
double Data_3 = 3;

int main(int a, int b, float X, double Y2)
{
    int Data_A;
    double Data_B = 25.45;

    if(x > y)
    {

        if(x < y)
        {
            int a = b;

        }
        else
        {

            int a = c;
        }

    }

    return 0;
}

void f1()
{
    int a = 5;
    goto Lb_1;
    return;
}
  OS

Command exited with non-zero status 58

Cached Result
Last Run:	3:07:17 pm
Compile:	0.021s
Execute:	0.06s
Memory:	3.09Mb
CPU:	0.081s

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