Simple differences between C # ref and out

1 class Program2     {3        //ref and out like C + + pointers, of course, can not be used directly when the pointer, is able to reference some parameters, but not directly as an address to control parameters (approximate meaning)4         Static voidMain (string[] args)5         {6             intA, B;7Outtest ( outA outb);8Console.WriteLine ("A={0},b={1}", A, b);9             //output A = 1;b = 2;Ten  One             intc = One, d = A; AOuttest ( outC outd); -Console.WriteLine ("A={0},b={1}", A, b); -             //output c = 1;d = 2; the  -             intm = One, n = A; -             //reftest (ref m, ref N); -Reftest (refMrefn); +Console.WriteLine ("M={0},n={1}", M, n); -             //output m = 22;n = one; +  A Swap (M, n); atConsole.WriteLine ("M={0},n={1}", M, n); -             //output m = 22;n = one; -         } -  -         Static voidOuttest ( out intX out inty) -         { in             //method can be used outside the body without assigning a value to the outgoing parameter -             //The method body, must assign the value to the outgoing parameter, otherwise error, for example: x=y; to             //functions that apply to multiple return values +x =1; -y =2; the         } *  $         Static voidReftest (ref intXref inty)Panax Notoginseng         { -  the             //method Body, you must assign a value to the parameter, otherwise the error +             //within the method body, ref can assign or not assign a value to a parameter A             //suitable for referencing the original value and modifying the original value the             inttemp =x; +x =y; -y =temp; $         } $  -         Static voidSwap (intAintb) -         { the             inttemp =A; -A =b;Wuyib =temp; the         } -}

Simple differences between C # ref and out