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Posted By

RichardIII on 02/11/08


Tagged

methods parameters passing out ref var


Versions (?)


Methods and Different Kind of Parameters Passing

Published in: C# 

In Delphi you have the possibility to modify Methods' Parameters (e.g. procedure AddPlus(var number: integer);) - in C# you will find the following realm of possibility:


Plain TextExpand 
  1. using System;
  2.  
  3. namespace parameters
  4. {
  5.     public static class democlass
  6.     {
  7.         //normal use
  8.         public static int Add(int left, int right)
  9.         {
  10.             return left + right;
  11.         }
  12.  
  13.         //use the ref Parameter, e.g. for increment
  14.         public static void AddPlus(ref int number)
  15.         {
  16.             number = number + 1;
  17.         }
  18.  
  19.         //use the out Parameter
  20.         public static void GetHundred(out int number)
  21.         {
  22.             number = 100;
  23.         }
  24.     }
  25.  
  26.     class Program
  27.     {
  28.         static void Main(string[] args)
  29.         {
  30.             int a = 10;
  31.             int b = 20;
  32.             int c;
  33.  
  34.             c = democlass.Add(a, b);
  35.             Console.WriteLine(c);           //30
  36.  
  37.             democlass.AddPlus(ref c);
  38.             Console.WriteLine(c);           //31
  39.  
  40.             democlass.GetHundred(out c);
  41.             Console.WriteLine(c);           //100
  42.         }
  43.     }
  44. }

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