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  1. using System;
  2. using System.Diagnostics;
  3. using System.Collections.Generic;
  4.  
  5.  
  6. public class Tarjeta {
  7. 	public /*required*/ int Num {
  8. 		get => this._num;
  9. 		init {
  10. 			Debug.Assert( value > 0, "num. de tarjeta debe ser positivo" );
  11. 			this._num = value;
  12. 			this.calculaCVC();
  13. 		}
  14. 	}
  15.  
  16. 	public /*required*/ DateOnly Caduca {
  17. 		get => this._caduca;
  18. 		init {
  19. 			Debug.Assert( value > DateOnly.FromDateTime( DateTime.Now ), "caducidad debe ser a futuro" );
  20. 			this._caduca = value;
  21. 		}
  22. 	}
  23.  
  24. 	public int CVC { get; private set; }
  25.  
  26. 	public Tarjeta(int num, DateOnly caduca)
  27. 	{
  28. 		Debug.Assert( num > 0, "num. de tarjeta debe ser positivo" );
  29. 		Debug.Assert( caduca > DateOnly.FromDateTime( DateTime.Now ), "caducidad debe ser a futuro" );
  30.  
  31. 		this.Num = num;
  32. 		this.Caduca = caduca;
  33. 		this.calculaCVC();
  34. 	}
  35.  
  36. 	private void calculaCVC()
  37. 	{
  38. 		this.CVC = this.Num % 1000;
  39. 	}
  40.  
  41. 	public override string ToString()
  42. 	{
  43. 		return $"{this.Num} ({this.Caduca}, {this.CVC})";
  44. 	}
  45.  
  46. 	private int _num;
  47. 	private DateOnly _caduca;
  48. }
  49.  
  50.  
  51. public class Test
  52. {
  53. 	public static void Main()
  54. 	{
  55. 	/*
  56. 		var t1 = new Tarjeta {
  57. 			Num = 548901687,
  58. 			Caduca = new DateOnly( 2034, 11, 5 )
  59. 		};
  60. 	*/	
  61. 		var t2 = new Tarjeta( 548901687, new DateOnly( 2034, 11, 5 ) );
  62.  
  63. 		// Console.WriteLine( t1 );
  64. 		Console.WriteLine( t2 );
  65. 	}
  66. }
  67.  
Success #stdin #stdout 0.07s 32560KB
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548901687 (11/5/2034, 687)
https://ideone.com/ihqdXQ
C# init properties.
language:
C# (NET 6.0)
created:
51 days ago
visibility:
public

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