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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Text;
  4. // using System.Linq;
  5.  
  6. class Program
  7. {
  8.     delegate void Operation();
  9.  
  10.     static void Main(string[] args)
  11.     {
  12.         // присваивание адреса метода через контруктор
  13.         Operation del = new Operation(First); // делегат указывает на метод Add
  14.  
  15.         Console.WriteLine( del.Invoke());
  16.  
  17.         del = Second; // теперь делегат указывает на метод Multiply
  18.  
  19.         Console.WriteLine(del.Invoke());
  20.  
  21.         Console.Read();
  22.     }
  23.             public static void First ()
  24.     {
  25.         double y, x, a;
  26.  
  27.  
  28.                 Console.WriteLine("Введите значение x:");
  29.                 x = int.Parse(Console.ReadLine());
  30.                 Console.WriteLine("Введите значение y:");
  31.                 y = int.Parse(Console.ReadLine());
  32.  
  33.                 a =(Math.Cos(x)/Math.PI-2*x)+16*x*Math.Cos(x*y)-2;
  34.  
  35.                     Console.WriteLine("a = "+ a);
  36.  
  37.     }
  38.         public static void Second ()
  39.     {
  40.         double r, p, h;
  41.         r = p = h = 0;
  42.         bool input = false;
  43.         while (!input)
  44.         {
  45.             Console.WriteLine("Введите значение r:");
  46.             r = int.Parse(Console.ReadLine());
  47.             if (r >= 0)
  48.             {
  49.                 input = true;
  50.             }
  51.             else
  52.             {
  53.                 Console.WriteLine("r меньше нуля!");
  54.             }
  55.         }
  56.  
  57.         input = false;
  58.         while (!input)
  59.         {
  60.  
  61.             Console.WriteLine("Введите значение h:");
  62.             h = int.Parse(Console.ReadLine());
  63.             if (h >= 0)
  64.             {
  65.                 input = true;
  66.             }
  67.             else
  68.             {
  69.                 Console.WriteLine("h меньше нуля!");
  70.             }
  71.         }
  72.  
  73.         p = 9.8 * r * h;
  74.         Console.WriteLine("p = " + p);
  75.  
  76.         }
  77.  
  78. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
prog.cs(15,17): error CS1502: The best overloaded method match for `System.Console.WriteLine(bool)' has some invalid arguments
/usr/lib/mono/4.5/mscorlib.dll (Location of the symbol related to previous error)
prog.cs(15,32): error CS1503: Argument `#1' cannot convert `void' expression to type `bool'
prog.cs(19,17): error CS1502: The best overloaded method match for `System.Console.WriteLine(bool)' has some invalid arguments
/usr/lib/mono/4.5/mscorlib.dll (Location of the symbol related to previous error)
prog.cs(19,31): error CS1503: Argument `#1' cannot convert `void' expression to type `bool'
Compilation failed: 4 error(s), 0 warnings
stdout
copy 
Standard output is empty
https://ideone.com/dzpETT
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
public

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