48 lines
1.8 KiB
HTML
48 lines
1.8 KiB
HTML
<html>
|
|
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
|
|
<title></title>
|
|
<link rel="StyleSheet" href="../../default.css">
|
|
</head>
|
|
|
|
<body>
|
|
<H1>Ðàñøèðåííûå îïåðàòîðû ïðèñâàèâàíèÿ</H1>
|
|
Ðàñøèðåííûé îïåðàòîð ïðèñâàèâàíèÿ èìååò âèä:
|
|
<blockquote>
|
|
<p><code class="codeit">ïåðåìåííàÿ</code> <code>op</code> <code class="codeit">âûðàæåíèå</code></p>
|
|
</blockquote>
|
|
<p>ãäå <code>op</code> - îäèí èç çíà÷êîâ ðàñøèðåííîãî ïðèñâàèâàíèÿ
|
|
<code>+=</code>, <code>-=</code>,
|
|
<code>*=</code>, <code>/=</code>.</p>
|
|
<p> êà÷åñòâå ïåðåìåííîé ìîæåò áûòü ïðîñòàÿ ïåðåìåííàÿ, ðàçûìåíîâàííûé
|
|
óêàçàòåëü, ïåðåìåííàÿ ñ èíäåêñàìè èëè êîìïîíåíò ïåðåìåííîé òèïà çàïèñü, à òàêæå
|
|
ñâîéñòâî êëàññà. </p>
|
|
<p>Ðàñøèðåííûå îïåðàòîðû ïðèñâàèâàíèÿ èìåþò
|
|
ñëåäóþùèé ñìûñë: <code>a #= b</code> îçíà÷àåò
|
|
<code>a := a # b</code>, ãäå <code>#</code> -
|
|
çíàê îïåðàöèè
|
|
<code>+</code>, <code>-</code>,
|
|
<code>*</code>, <code>/</code>. </p>
|
|
<p>Ðàñøèðåííûå îïåðàòîðû ïðèñâàèâàíèÿ èñïîëüçóþòñÿ ïðåæäå âñåãî äëÿ ÷èñëîâûõ
|
|
òèïîâ. Íàïðèìåð:</p>
|
|
<blockquote>
|
|
<p><code>a += 3; // a := a + 3; - óâåëè÷èòü a íà 3<br>
|
|
b *= 2; // b := b * 2; - óâåëè÷èòü b â 2 ðàçà</code></p>
|
|
</blockquote>
|
|
<p>Îïåðàòîð <code>/=</code> íåïðèìåíèì
|
|
åñëè ëåâûé îïåðàíä - öåëûé.</p>
|
|
|
|
<p>Èñïîëüçîâàíèå îïåðàòîðîâ <code>+=</code> è <code>*=</code> äëÿ ñòðîê îïèñàíî
|
|
<a href="../Types/string.html">çäåñü</a><span lang="ru">.</span></p>
|
|
<p><span lang="ru">Èñïîëüçîâàíèå îïåðàòîðîâ </span><code>
|
|
+=</code><span lang="ru">, </span><code>-=</code><span lang="ru"> è </span>
|
|
<code>*=</code><span lang="ru"> äëÿ ìíîæåñòâ îïèñàíî
|
|
<a href="../Operations_Expressions/setop.html">çäåñü</a>. </span></p>
|
|
<p><span lang="ru"> Äåéñòâèå îïåðàòîðîâ <code>
|
|
+=</code>, <code>-=</code> äëÿ
|
|
ïðîöåäóðíûõ ïåðåìåííûõ îïèñàíî <a href="plusequal.html">çäåñü</a>. </span></p>
|
|
</body>
|
|
|
|
</html>
|