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Simultaneous update of Simplified Chinese documentation
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <?xml-stylesheet type="text/xsl" href="../helpproject.xsl" ?> | ||
| <topic template="Default" modified="2024-12-04T00:07:55.077+08:00" lasteditedby="niuji" version="2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../helpproject.xsd"> | ||
| <title>__InterpolatedStrings</title> | ||
| <body> | ||
| <header> | ||
| <para styleclass="Heading1">__InterpolatedStrings</para> | ||
| </header> | ||
| <para styleclass="Normal">插值字符串是一种允许将局部变量、实例变量或其他表达式嵌入字面字符串的功能。X# 支持两种插值字符串：</para> | ||
| <para styleclass="Normal"></para> | ||
| <para styleclass="Heading2"><text style="font-weight:bold;">1.</text><tab /><text style="font-weight:bold;">常规插值字符串： i"...."</text></para> | ||
| <para styleclass="Normal"><tab /></para> | ||
| <para styleclass="Normal">其工作方式与普通 X# 字符串类似，内嵌表达式：</para> | ||
| <para styleclass="Normal"></para> | ||
| <para styleclass="Code Example"><tab /><text style="font-weight:bold; font-style:normal; color:#3366ff;">FUNCTION</text><text style="font-weight:normal; font-style:normal; color:#000000;"> Start </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">VOID</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">LOCAL</text><text style="font-weight:normal; font-style:normal; color:#000000;"> Who </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">STRING</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Who := </text><text style="font-weight:bold; font-style:normal; color:#993366;">"World"</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Writeline( i</text><text style="font-weight:bold; font-style:normal; color:#993366;">"Hello {Who}"</text><text style="font-weight:normal; font-style:normal; color:#000000;">)</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Read()</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">RETURN</text></para> | ||
| <para styleclass="Heading2">2.<tab />扩展插值字符串： ie"..." 和 ei"...."</para> | ||
| <para styleclass="Normal">这是插值字符串和扩展字符串的组合。在下面的示例中，\t 将被 tab 字符替换：</para> | ||
| <para styleclass="Normal"></para> | ||
| <para styleclass="Code Example"><text style="font-weight:normal; font-style:normal; color:#000000;">   </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">FUNCTION</text><text style="font-weight:normal; font-style:normal; color:#000000;"> Start </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">VOID</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">LOCAL</text><text style="font-weight:normal; font-style:normal; color:#000000;"> Who </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">STRING</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Who := </text><text style="font-weight:bold; font-style:normal; color:#993366;">"World"</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Writeline( ie</text><text style="font-weight:bold; font-style:normal; color:#993366;">"Hello\t{Who}"</text><text style="font-weight:normal; font-style:normal; color:#000000;">)</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Read()</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">RETURN</text></para> | ||
| <para styleclass="Heading2">注意：</para> | ||
| <para styleclass="" style="text-align:left; text-indent:0px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; line-height:1.00; background-color:transparent; white-space:normal; page-break-inside:auto; page-break-after:auto; border:none; tabstops:none;"><text styleclass="" style="font-family:Arial; font-size:10pt; color:#000000;">X# 内的插值字符串可以包含以下形式的表达式</text></para> | ||
| <para styleclass="Code Example"><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#3366ff;">{<interpolationExpression>[,<alignment>][::<formatString>]}</text></para> | ||
| <para styleclass="Body Text">在 C# 中，formatString 的前缀是单冒号。请注意，由于在 X# 中，冒号（:）操作符是实例字段、属性和方法的默认成员访问操作符，因此并不总是可以使用该操作符来分隔表达式和格式字符串。因此，我们将该操作符改为双冒号（::）。如果使用 /allowdot+ 进行编译，也可以使用单冒号作为格式分隔符。</para> | ||
| <para styleclass="Body Text"></para> | ||
| <para styleclass="Body Text">要表示字面上的“{”或“}”字符，必须在字符串中复制它们。本例中字符串内的表达式用斜体表示。</para> | ||
| <para styleclass="Code Example"><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">  </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">FUNCTION</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> Start() </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">AS</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">VOID</text><br/><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">   </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">local</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> X := 2 </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">as</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">INT</text><br/><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">   </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">local</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> Y := 3 </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">as</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">INT</text><br/><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">   </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">var</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;"> pointMessage := i</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#3366ff;">"The point {{{</text><text style="font-weight:bold; font-style:italic; text-decoration:none; color:#3366ff;">X</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#3366ff;">}, {</text><text style="font-weight:bold; font-style:italic; text-decoration:none; color:#3366ff;">Y</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#3366ff;">}}} is {</text><text style="font-weight:bold; font-style:italic; text-decoration:none; color:#3366ff;">Math.Sqrt(X * X + Y * Y)</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#3366ff;">::F3} from the origin"</text><br/><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">   </text><text style="font-weight:bold; font-style:normal; text-decoration:none; color:#ff0000;">Console</text><text style="font-weight:normal; font-style:normal; text-decoration:none; color:#000000;">.WriteLine(pointMessage)</text><br/><tab /><text style="font-style:italic; text-decoration:none; color:#339966;">// 输出结果:</text><br/><tab /><text style="font-style:italic; text-decoration:none; color:#339966;">// The point {2, 3} is 3.606 from the origin</text></para> | ||
| <para styleclass="Body Text"></para> | ||
| <para styleclass="Normal">字符串内的表达式元素可以使用格式化符号，就像 String.Format() 符号一样。例如：</para> | ||
| <para styleclass="Normal"></para> | ||
| <para styleclass="Code Example"><tab /><text style="font-weight:bold; font-style:normal; color:#3366ff;">FUNCTION</text><text style="font-weight:normal; font-style:normal; color:#000000;"> Start </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">VOID</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">LOCAL</text><text style="font-weight:normal; font-style:normal; color:#000000;"> i </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">AS</text><text style="font-weight:normal; font-style:normal; color:#000000;"> INT</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      i := 42</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Writeline( i</text><text style="font-weight:bold; font-style:normal; color:#993366;">"Hello {i:x}"</text><text style="font-weight:normal; font-style:normal; color:#000000;">)   </text><text style="font-weight:normal; font-style:italic; color:#339966;">// i 用十六进制表示，所以输出 Hello 2a</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">      Console.Read()</text><br/><text style="font-weight:normal; font-style:normal; color:#000000;">     </text><text style="font-weight:bold; font-style:normal; color:#3366ff;">RETURN</text></para> | ||
| </body> | ||
| </topic> |
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