в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:17:53Z

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==struct objects have the same pass by value semantics as simple intrinsics==

<source lang="csharp">using System;
class Class1 {
public static void Main(string[] args) {
int i = 0;
Console.WriteLine("Initial value of i = {0}", i);
fn_int(i);
Console.WriteLine("i after fn_int() = {0}", i);
fn_Int32(i);
Console.WriteLine("i after fn_Int32 = {0}", i);
Console.WriteLine();
Int32 i32 = 1;
Console.WriteLine("Initial value of i32 = {0}", i32);
fn_int(i32);
Console.WriteLine("i32 after fn_int() = {0}", i32);
fn_Int32(i32);
Console.WriteLine("i32 after fn_Int32 = {0}", i32);
}
public static void fn_Int32(Int32 k) {
k = 10;
}

public static void fn_int(int k) {
k = 20;
}
}</source>

==Use ref for a struct parameter==

<source lang="csharp">using System;
public struct MyStruct
{
public int val;
}
public class MainClass
{
static void Main() {
MyStruct myValue = new MyStruct();
myValue.val = 10;
PassByValue( myValue );
Console.WriteLine( "Result of PassByValue: myValue.val = {0}", myValue.val );
PassByRef( ref myValue );
Console.WriteLine( "Result of PassByRef: myValue.val = {0}", myValue.val );
}
static void PassByValue( MyStruct myValue ) {
myValue.val = 50;
}
static void PassByRef( ref MyStruct myValue ) {
myValue.val = 42;
}
}</source>
<pre class=codeResult>Result of PassByValue: myValue.val = 10
Result of PassByRef: myValue.val = 42</pre>

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Csharp/CSharp Tutorial/struct/struct parameter - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия