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How to implement call-by-reference in C# ?

Posted on 2003-03-16
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Last Modified: 2009-08-31
plz look at the following code.

class Test
{
     public static void swap(int &a,int &b)
     {
          int c=a; a=b; b=c;
     }
     public static void Main()
     {
          int x=10,y=20;
          swap(x,y);
          System.Console.WriteLine("x={0} and y={1}",x,y);
     }
};

   It is not working. I tried the same
swap function using pointers too as follows

     public static void swap(int *p,int *q)
     {
          int c=*p; *p=*q; *q=c;
     }
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Question by:balakiran_bs
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3 Comments
 

Accepted Solution

by:
Lagi earned 200 total points
ID: 8146890
You should use

void swap(ref int a, ref int b)
{
  int c = a;
  a = b;
  b = c;
}

static void main()
{
  int a = 10;
  int b = 20;
  swap(ref a, ref b);
}
0

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