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  1. using System;
  2. using System.Text;
  3.  
  4. public struct Magma<T>
  5. {
  6.     public readonly Func<T, T, T> op;
  7.     public Magma(Func<T, T, T> op)
  8.     {
  9.         this.op = op;
  10.     }
  11. }
  12.  
  13. public static class Magma
  14. {
  15.     public static readonly Magma<float> FloatSum =
  16.         new Magma<float>((a, b) => a + b);
  17.     public static readonly Magma<int> IntSum =
  18.         new Magma<int>((a, b) => a + b);        
  19. }
  20.  
  21. public struct Matrix<T>
  22. {
  23.     public readonly T[] Elems;
  24.     public readonly int Dim;
  25.  
  26.     public Matrix(int dim)
  27.     {
  28.         Dim = dim;
  29.         Elems = new T[dim * dim];
  30.     }
  31.  
  32.     public Matrix(T[] elems)
  33.     {
  34.         Dim = (int)Math.Sqrt(elems.Length);
  35.         Elems = elems;
  36.     }
  37.  
  38.     public override string ToString() 
  39.     {
  40.     	var sb = new StringBuilder();
  41.     	for (int i = 0; i < Dim; ++i)
  42.     	{
  43.     		for (int j = 0; j < Dim; ++j)
  44.     			sb.Append(Elems[i*Dim + j]).Append(' ');
  45.     		sb.AppendLine();
  46.     	}
  47.     	return sb.ToString();
  48.     }
  49. }
  50.  
  51. public static class Matrix
  52. {
  53.     public static Matrix<T> Sum<T>(Matrix<T> lhs, Matrix<T> rhs, Magma<T> sum)
  54.     {
  55.         var result = new Matrix<T>(lhs.Dim);
  56.         for (int i = 0; i < lhs.Elems.Length; ++i)
  57.         {
  58.             result.Elems[i] = sum.op(lhs.Elems[i], rhs.Elems[i]);
  59.         }
  60.         return result;
  61.     }
  62. }
  63.  
  64. public class Test
  65. {
  66. 	public static void Main()
  67. 	{
  68. 		var a = new Matrix<float>(new float[] { 1.1f, 2.2f, 3.3f, 4.4f });
  69. 		Console.WriteLine(Matrix.Sum(a, a, Magma.FloatSum));
  70. 		var b = new Matrix<int>(new int[] { 3, 5, 4, 9 });
  71. 		Console.WriteLine(Matrix.Sum(b, b, Magma.IntSum));
  72. 	}
  73. }
Success #stdin #stdout 0.04s 24000KB
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https://ideone.com/fsQSkw
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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