Nullable comparison | C# Online Compiler

Nullable comparison by Uwe Keim

using System;
					
public class Program
{
	// Related to https://stackoverflow.com/q/15777745/107625
	
	public static void Main()
	{
		if ( true )
		{
			int? a = null;
			int? b = 1;
		
			compare(a,b);
		}

		if ( true )
		{
			int? a = null;
			int? b = null;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = 4;
			int? b = 5;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = 5;
			int? b = 5;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = 5;
			int? b = 4;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = 5;
			int b = 4;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = null;
			int b = 4;
		
			compare(a,b);
		}
		
		if ( true )
		{
			int? a = null;
			int b = 0;
		
			compare(a,b);
		}
	}
	
	private static void compare(int? a, int? b)
	{
		if (a < b)
			Console.WriteLine("'{0}' is bigger than '{1}'.", b, a);
		else if (a > b)
			Console.WriteLine("'{0}' is bigger than '{1}'.", a, b);
		else if ( a == b )
			Console.WriteLine("Both '{0}' and '{1}' are equal.", a, b);
		else
			Console.WriteLine("'{0}' and '{1}' are not equal.", a, b);

		Console.WriteLine("--------------------------------------");
	}
	
	private static void compare(int a, int? b)
	{
		if (a < b)
			Console.WriteLine("'{0}' is bigger than '{1}'.", b, a);
		else if (a > b)
			Console.WriteLine("'{0}' is bigger than '{1}'.", a, b);
		else if ( a == b )
			Console.WriteLine("Both '{0}' and '{1}' are equal.", a, b);
		else
			Console.WriteLine("'{0}' and '{1}' are not equal.", a, b);

		Console.WriteLine("--------------------------------------");
	}
}

​x
 
using System;
                    
public class Program
{
    // Related to https://stackoverflow.com/q/15777745/107625
    
    public static void Main()
    {
        if ( true )
        {
            int? a = null;
            int? b = 1;
        
            compare(a,b);
        }
​
        if ( true )
        {
            int? a = null;
            int? b = null;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = 4;
            int? b = 5;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = 5;
            int? b = 5;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = 5;
            int? b = 4;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = 5;
            int b = 4;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = null;
            int b = 4;
        
            compare(a,b);
        }
        
        if ( true )
        {
            int? a = null;
            int b = 0;
        
            compare(a,b);
        }
    }
    
    private static void compare(int? a, int? b)
    {
        if (a < b)
            Console.WriteLine("'{0}' is bigger than '{1}'.", b, a);
        else if (a > b)
            Console.WriteLine("'{0}' is bigger than '{1}'.", a, b);
        else if ( a == b )
            Console.WriteLine("Both '{0}' and '{1}' are equal.", a, b);
        else
            Console.WriteLine("'{0}' and '{1}' are not equal.", a, b);
​
        Console.WriteLine("--------------------------------------");
    }
    
    private static void compare(int a, int? b)
    {
        if (a < b)
            Console.WriteLine("'{0}' is bigger than '{1}'.", b, a);
        else if (a > b)
            Console.WriteLine("'{0}' is bigger than '{1}'.", a, b);
        else if ( a == b )
            Console.WriteLine("Both '{0}' and '{1}' are equal.", a, b);
        else
            Console.WriteLine("'{0}' and '{1}' are not equal.", a, b);
​
        Console.WriteLine("--------------------------------------");
    }
}

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