{"id":108204,"date":"2026-09-21T08:16:51","date_gmt":"2026-09-21T00:16:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/108204.html"},"modified":"2026-09-21T08:16:51","modified_gmt":"2026-09-21T00:16:51","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3c-%e9%87%8d%e8%bd%bd-%ef%bc%9c%e5%9b%9b%ef%bc%9e-%e9%87%8d%e8%bd%bd%e5%8a%a0%e5%8f%b7%e8%bf%90%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/108204.html","title":{"rendered":"\u6df1\u5165\u7406\u89e3C++ \u91cd\u8f7d \uff1c\u56db\uff1e \u91cd\u8f7d\u52a0\u53f7\u8fd0\u7b97\u7b26"},"content":{"rendered":"<p>\u5728 C&#043;&#043; \u4e2d&#xff0c;\u91cd\u8f7d &#043; \u8fd0\u7b97\u7b26\u7684\u672c\u8d28\u662f\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a operator&#043; \u7684\u51fd\u6570\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u8ba9\u81ea\u5b9a\u4e49\u7c7b\u578b\u652f\u6301\u7c7b\u4f3c\u5185\u7f6e\u7c7b\u578b\u7684\u52a0\u6cd5\u5199\u6cd5&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>Point a(1, 2);<br \/>\nPoint b(3, 4);<br \/>\nPoint c &#061; a &#043; b;   \/\/ \u5e0c\u671b\u5f97\u5230 (4, 6)<\/p>\n<p>&#043; \u65e2\u53ef\u4ee5\u91cd\u8f7d\u4e3a\u6210\u5458\u51fd\u6570&#xff0c;\u4e5f\u53ef\u4ee5\u91cd\u8f7d\u4e3a\u975e\u6210\u5458\u51fd\u6570\u3002\u4e8c\u5143 &#043; \u7684\u4e24\u79cd\u57fa\u672c\u5f62\u5f0f\u5982\u4e0b\u3002<\/p>\n<hr \/>\n<h3>1. \u6210\u5458\u51fd\u6570\u5f62\u5f0f<\/h3>\n<p>\u5728\u7c7b\u5185\u58f0\u660e&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>class Point {<br \/>\npublic:<br \/>\n    Point operator&#043;(const Point&amp; rhs) const;<br \/>\n};<\/p>\n<p>\u542b\u4e49&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5de6\u64cd\u4f5c\u6570\u662f\u5f53\u524d\u5bf9\u8c61 *this&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u53f3\u64cd\u4f5c\u6570\u662f\u53c2\u6570 rhs&#xff1b;<\/p>\n<\/li>\n<li>\n<p>const \u8868\u793a\u4e0d\u4f1a\u4fee\u6539\u5f53\u524d\u5bf9\u8c61&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8fd4\u56de\u7c7b\u578b\u901a\u5e38\u662f\u65b0\u5bf9\u8c61 Point&#xff0c;\u800c\u4e0d\u662f\u5f15\u7528&#xff1b;<\/p>\n<\/li>\n<li>\n<p>a &#043; b \u7b49\u4ef7\u4e8e a.operator&#043;(b)\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5b9e\u73b0&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>Point Point::operator&#043;(const Point&amp; rhs) const {<br \/>\n    return Point(x_ &#043; rhs.x_, y_ &#043; rhs.y_);<br \/>\n}<\/p>\n<p>\u6ce8\u610f&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u53c2\u6570\u7528 const Point&amp;&#xff0c;\u907f\u514d\u62f7\u8d1d&#xff0c;\u4e5f\u8868\u660e\u4e0d\u4fee\u6539\u53f3\u64cd\u4f5c\u6570&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8fd4\u56de\u503c\u7528 Point&#xff0c;\u56e0\u4e3a a &#043; b \u4ea7\u751f\u4e00\u4e2a\u4e34\u65f6\u65b0\u5bf9\u8c61&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u8981\u8fd4\u56de\u5c40\u90e8\u5bf9\u8c61\u7684\u5f15\u7528&#xff0c;\u5426\u5219\u4f1a\u60ac\u7a7a\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>2. \u975e\u6210\u5458\u51fd\u6570\u5f62\u5f0f<\/h3>\n<p>\u4e5f\u53ef\u4ee5\u5199\u6210\u7c7b\u5916\u51fd\u6570&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>Point operator&#043;(const Point&amp; lhs, const Point&amp; rhs);<\/p>\n<p>\u5982\u679c\u8be5\u51fd\u6570\u9700\u8981\u8bbf\u95ee Point \u7684\u79c1\u6709\u6210\u5458&#xff0c;\u53ef\u4ee5\u5728\u7c7b\u5185\u58f0\u660e\u4e3a\u53cb\u5143&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>class Point {<br \/>\n    friend Point operator&#043;(const Point&amp; lhs, const Point&amp; rhs);<br \/>\n};<\/p>\n<p>\u5b9e\u73b0&#xff1a;<\/p>\n<p>cpp<\/p>\n<p>Point operator&#043;(const Point&amp; lhs, const Point&amp; rhs) {<br \/>\n    return Point(lhs.x_ &#043; rhs.x_, lhs.y_ &#043; rhs.y_);<br \/>\n}<\/p>\n<p>\u975e\u6210\u5458\u51fd\u6570\u7684\u597d\u5904\u662f\u5de6\u53f3\u64cd\u4f5c\u6570\u5730\u4f4d\u5bf9\u79f0\u3002\u4f8b\u5982\u5982\u679c Point \u6709\u975e explicit \u7684\u6784\u9020\u51fd\u6570&#xff0c;\u90a3\u4e48 5 &#043; p \u548c p &#043; 5 \u90fd\u53ef\u80fd\u652f\u6301\u3002\u6210\u5458\u51fd\u6570\u5f62\u5f0f\u901a\u5e38\u8981\u6c42\u5de6\u64cd\u4f5c\u6570\u5df2\u7ecf\u662f Point \u7c7b\u578b\u3002<\/p>\n<p>\u4f46\u6ce8\u610f&#xff1a;\u4e0d\u8981\u540c\u65f6\u5bf9\u540c\u4e00\u4e2a\u7c7b\u578b\u5b9a\u4e49\u6210\u5458\u7248\u548c\u975e\u6210\u5458\u7248\u7684\u540c\u4e00\u4e2a operator&#043;&#xff0c;\u5426\u5219 a &#043; b \u4f1a\u4ea7\u751f\u4e8c\u4e49\u6027\u3002<\/p>\n<hr \/>\n<h3>3. \u5173\u952e\u89c4\u5219<\/h3>\n<li>\n<p>\u4e0d\u80fd\u6539\u53d8\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u3001\u7ed3\u5408\u6027\u548c\u64cd\u4f5c\u6570\u4e2a\u6570\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u80fd\u91cd\u8f7d\u5185\u7f6e\u7c7b\u578b\u4e4b\u95f4\u7684 &#043;&#xff0c;\u4f8b\u5982 int operator&#043;(int, int) \u662f\u975e\u6cd5\u7684\u3002<\/p>\n<\/li>\n<li>\n<p>\u81f3\u5c11\u6709\u4e00\u4e2a\u64cd\u4f5c\u6570\u5fc5\u987b\u662f\u7528\u6237\u5b9a\u4e49\u7c7b\u578b\u6216\u679a\u4e3e\u7c7b\u578b\u3002<\/p>\n<\/li>\n<li>\n<p>operator&#043; \u901a\u5e38\u4e0d\u4fee\u6539\u64cd\u4f5c\u6570&#xff0c;\u8fd4\u56de\u4e00\u4e2a\u65b0\u5bf9\u8c61\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u662f\u6210\u5458\u51fd\u6570&#xff0c;\u5efa\u8bae\u52a0 const&#xff0c;\u5426\u5219 const Point \u5bf9\u8c61\u65e0\u6cd5\u4f7f\u7528 &#043;\u3002<\/p>\n<\/li>\n<li>\n<p>\u53c2\u6570\u5efa\u8bae\u7528 const T&amp;&#xff0c;\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u62f7\u8d1d\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd4\u56de\u503c\u5efa\u8bae\u7528\u503c\u7c7b\u578b T&#xff0c;\u800c\u4e0d\u662f T&amp;\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u5e38\u53ef\u4ee5\u5148\u5b9e\u73b0 operator&#043;&#061;&#xff0c;\u518d\u57fa\u4e8e\u5b83\u5b9e\u73b0 operator&#043;&#xff0c;\u4f46\u7b80\u5355\u573a\u666f\u76f4\u63a5\u6784\u9020\u65b0\u5bf9\u8c61\u5373\u53ef\u3002<\/p>\n<\/li>\n<p>#include &lt;iostream&gt;<\/p>\n<p>class Point {<br \/>\npublic:<br \/>\n    Point(int x &#061; 0, int y &#061; 0) : x_(x), y_(y) {}<\/p>\n<p>    \/\/ \u91cd\u8f7d\u4e8c\u5143 &#043;&#xff1a;\u6210\u5458\u51fd\u6570\u7248\u672c<br \/>\n    \/\/ a &#043; b \u7b49\u4ef7\u4e8e a.operator&#043;(b)<br \/>\n    Point operator&#043;(const Point&amp; rhs) const {<br \/>\n        return Point(x_ &#043; rhs.x_, y_ &#043; rhs.y_);<br \/>\n    }<\/p>\n<p>    \/\/ \u91cd\u8f7d &#043;&#061;&#xff1a;\u4fee\u6539\u5f53\u524d\u5bf9\u8c61&#xff0c;\u8fd4\u56de\u81ea\u8eab\u5f15\u7528<br \/>\n    Point&amp; operator&#043;&#061;(const Point&amp; rhs) {<br \/>\n        x_ &#043;&#061; rhs.x_;<br \/>\n        y_ &#043;&#061; rhs.y_;<br \/>\n        return *this;<br \/>\n    }<\/p>\n<p>    int x() const { return x_; }<br \/>\n    int y() const { return y_; }<\/p>\n<p>private:<br \/>\n    int x_;<br \/>\n    int y_;<br \/>\n};<\/p>\n<p>\/\/ \u91cd\u8f7d\u8f93\u51fa\u8fd0\u7b97\u7b26&#xff0c;\u65b9\u4fbf\u6253\u5370<br \/>\nstd::ostream&amp; operator&lt;&lt;(std::ostream&amp; os, const Point&amp; p) {<br \/>\n    os &lt;&lt; &#034;(&#034; &lt;&lt; p.x() &lt;&lt; &#034;, &#034; &lt;&lt; p.y() &lt;&lt; &#034;)&#034;;<br \/>\n    return os;<br \/>\n}<\/p>\n<p>int main() {<br \/>\n    Point a(1, 2);<br \/>\n    Point b(3, 4);<\/p>\n<p>    Point c &#061; a &#043; b;  \/\/ \u8c03\u7528 a.operator&#043;(b)<br \/>\n    std::cout &lt;&lt; &#034;a &#061; &#034; &lt;&lt; a &lt;&lt; &#039;\\\\n&#039;;<br \/>\n    std::cout &lt;&lt; &#034;b &#061; &#034; &lt;&lt; b &lt;&lt; &#039;\\\\n&#039;;<br \/>\n    std::cout &lt;&lt; &#034;a &#043; b &#061; &#034; &lt;&lt; c &lt;&lt; &#039;\\\\n&#039;;<\/p>\n<p>    \/\/ \u652f\u6301\u94fe\u5f0f\u52a0\u6cd5<br \/>\n    Point d &#061; a &#043; b &#043; Point(10, 20);<br \/>\n    std::cout &lt;&lt; &#034;a &#043; b &#043; (10,20) &#061; &#034; &lt;&lt; d &lt;&lt; &#039;\\\\n&#039;;<\/p>\n<p>    \/\/ \u6d4b\u8bd5 &#043;&#061;<br \/>\n    a &#043;&#061; b;<br \/>\n    std::cout &lt;&lt; &#034;a &#043;&#061; b \u540e a &#061; &#034; &lt;&lt; a &lt;&lt; &#039;\\\\n&#039;;<\/p>\n<p>    return 0;<br \/>\n}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 C \u4e2d&#xff0c;\u91cd\u8f7d  \u8fd0\u7b97\u7b26\u7684\u672c\u8d28\u662f\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a operator \u7684\u51fd\u6570\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u8ba9\u81ea\u5b9a\u4e49\u7c7b\u578b\u652f\u6301\u7c7b\u4f3c\u5185\u7f6e\u7c7b\u578b\u7684\u52a0\u6cd5\u5199\u6cd5&#xff0c;\u4f8b\u5982&#xff1a;cppPoint a(1, 2);<br \/>\nPoint b(3, 4);<br \/>\nPoint c  a  b;   \/\/ \u5e0c\u671b\u5f97\u5230 (4, 6) \u65e2\u53ef\u4ee5\u91cd\u8f7d\u4e3a\u6210\u5458\u51fd\u6570&#xff0c;\u4e5f\u53ef\u4ee5\u91cd\u8f7d\u4e3a\u975e\u6210\u5458\u51fd\u6570\u3002\u4e8c\u5143  \u7684\u4e24\u79cd\u57fa\u672c\u5f62\u5f0f\u5982\u4e0b\u30021. \u6210\u5458\u51fd\u6570\u5f62\u5f0f\u5728\u7c7b\u5185\u58f0\u660e&#xff1a;cppclass Point {<br \/>\npublic<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-108204","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-190"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u6df1\u5165\u7406\u89e3C++ \u91cd\u8f7d \uff1c\u56db\uff1e \u91cd\u8f7d\u52a0\u53f7\u8fd0\u7b97\u7b26 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/108204.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6df1\u5165\u7406\u89e3C++ \u91cd\u8f7d \uff1c\u56db\uff1e \u91cd\u8f7d\u52a0\u53f7\u8fd0\u7b97\u7b26 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u5728 C \u4e2d&#xff0c;\u91cd\u8f7d \u8fd0\u7b97\u7b26\u7684\u672c\u8d28\u662f\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a operator \u7684\u51fd\u6570\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u8ba9\u81ea\u5b9a\u4e49\u7c7b\u578b\u652f\u6301\u7c7b\u4f3c\u5185\u7f6e\u7c7b\u578b\u7684\u52a0\u6cd5\u5199\u6cd5&#xff0c;\u4f8b\u5982&#xff1a;cppPoint a(1, 2); 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