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'深入理解C#中Checked和Unchecked关键字的作用'

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'C,中,和,U,关键,的,用'

'Checked和Unchecked关键字Checked和Unchecked关键字是C#中的控制语句，用于控制程序在编译时的行为。它们用于控制程序在溢出时的行为，以及确定程序中的数据类型转换是否可以安全'

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'2025-03-18 18:32:23'

'2025-03-18 18:32:23'

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'
                    

<h3>Checked和Unchecked关键字</h3>
<p>Checked和Unchecked关键字是C#中的控制语句，用于控制程序在编译时的行为。它们用于控制程序在溢出时的行为，以及确定程序中的数据类型转换是否可以安全进行。</p>

<h3>Checked关键字</h3>
<p>Checked关键字用于指示编译器在编译时对溢出进行检查。如果程序中存在可能导致溢出的表达式，则编译器将生成一个异常，这样可以在运行时避免溢出的发生。</p>
<pre>
int x = 100; 
int y = 200; 
int z = checked(x * y); 
</pre>
<p>上面的代码中，我们使用checked关键字来避免溢出的发生。如果x * y的结果超出了int类型可以表示的范围，则编译器将生成一个异常，以提醒程序员检查代码。</p>

<h3>Unchecked关键字</h3>
<p>Unchecked关键字用于指示编译器在编译时不对溢出进行检查。这意味着，如果程序中存在可能导致溢出的表达式，编译器将不会生成任何异常，程序在运行时可能会发生溢出。</p>
<pre>
int x = 100; 
int y = 200; 
int z = unchecked(x * y); 
</pre>
<p>上面的代码中，我们使用unchecked关键字来禁止溢出检查。如果x * y的结果超出了int类型可以表示的范围，编译器将不会生成任何异常，程序在运行时可能会发生溢出。</p>

<h3>使用方法</h3>
<p>Checked和Unchecked关键字都可以用于控制程序在编译时的行为，但是它们的用法有所不同。</p>
<ul>
<li>Checked关键字用于指示编译器在编译时对溢出进行检查，如果程序中存在可能导致溢出的表达式，则编译器将生成一个异常。</li>
<li>Unchecked关键字用于指示编译器在编译时不对溢出进行检查，这意味着，如果程序中存在可能导致溢出的表达式，编译器将不会生成任何异常，程序在运行时可能会发生溢出。</li>
</ul>                

               '

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'深入理解C#中Checked和Unchecked关键字的作用_知识百科_文汇知识网'

'C,中,和,U,关键,的,用'

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