?1using?System;
?2
?3public?partial?class?testref?:?System.Web.UI.Page
?4{
?5????static?void?outTest(out?int?x,?out?int?y)
?6????{//離開這個函數前，必須對x和y賦值，否則會報錯。?
?7????????//y?=?x;?
?8????????//上面這行會報錯，因為使用了out后，x和y都清空了，需要重新賦值，即使調用函數前賦過值也不行?
?9????????x?=?1;
10????????y?=?2;
11????}
12????static?void?refTest(ref?int?x,?ref?int?y)
13????{
14????????x?=x+?1;
15????????y?=?y+1;
16????}?
17
18????protected?void?Page_Load(object?sender,?EventArgs?e)
19????{
20????????//out?test?
21????????int?a,?b;
22????????//out使用前，變量可以不賦值?
23????????outTest(out?a,?out?b);
24????????Response.Write("a={0};b={1}"+a+b);
25????????int?c?=?11,?d?=?22;
26????????outTest(out?c,?out?d);
27????????Response.Write("c={0};d={1}"+c+d);
28
29????????//ref?test?
30????????int?m,?n;
31????????//refTest(ref?m,?ref?n);?
32????????//上面這行會出錯，ref使用前，變量必須賦值?
33
34????????int?o?=?11,?p?=?22;
35????????refTest(ref?o,?ref?p);
36????????Response.Write("o={11};p={22}"?+?o?+?p);
37
38
39????}
40}
41

轉載于:https://www.cnblogs.com/wiyy315/archive/2008/04/15/1155078.html

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