{"id":222,"date":"2018-12-06T22:13:43","date_gmt":"2018-12-06T14:13:43","guid":{"rendered":"https:\/\/103.249.111.182\/?p=222"},"modified":"2024-08-17T22:48:12","modified_gmt":"2024-08-17T14:48:12","slug":"%e7%ac%94%e8%ae%b0c%e8%af%ad%e8%a8%80%e6%8c%87%e9%92%88%e5%ad%a6%e4%b9%a0%e5%b0%8f%e7%bb%9320181206","status":"publish","type":"post","link":"https:\/\/7gugu.com\/index.php\/2018\/12\/06\/%e7%ac%94%e8%ae%b0c%e8%af%ad%e8%a8%80%e6%8c%87%e9%92%88%e5%ad%a6%e4%b9%a0%e5%b0%8f%e7%bb%9320181206\/","title":{"rendered":"[\u7b14\u8bb0][C\u8bed\u8a00]\u6307\u9488\u5b66\u4e60\u5c0f\u7ed3[20181206]"},"content":{"rendered":"<h2>C\u8bed\u8a00\u5b66\u4e60\u5c0f\u7ed3:<\/h2>\n<h4>\u6307\u9488\u7684\u521d\u59cb\u5316<\/h4>\n<p>\u6307\u9488\u53d8\u91cf\u53ef\u4ee5\u521d\u59cb\u5316\u4e3a0,NULL\u6216\u4e00\u4e2a\u5730\u5740[16\u8fdb\u5236]<br \/>\n0\u548cNULL\u7b49\u4ef7,\u76f8\u5f53\u4e8e\u4e00\u4e2a\u7a7a\u5730\u5740<\/p>\n<pre>\/\/\u4f7f\u7528(\u53d8\u91cf\u7c7b\u578b *\u53d8\u91cf\u540d)\u8fd9\u6837\u4e00\u4e2a\u7ec4\u5408\u5c31\u53ef\u4ee5\u58f0\u660e\u4e00\u4e2a\u6307\u5b9a\u7c7b\u578b\u7684\u6307\u9488\u53d8\u91cf\nint *a;\n<\/pre>\n<ul>\n<li>\u6307\u9488\u53d8\u91cf\u5c31\u662f\u7528\u6765\u5b58\u50a8<strong><span style=\"color: #ff9900;\">\u53d8\u91cf\u5730\u5740<\/span><\/strong>\u7684\u4e00\u79cd\u53d8\u91cf<\/li>\n<li>\u6307\u9488\u7684\u5b58\u50a8\u7684\u5730\u5740\u6307\u7684\u662f\u8be5<strong><span style=\"color: #ff9900;\">\u53d8\u91cf\u7684\u8d77\u59cb\u4f4d\u7f6e<\/span><\/strong><\/li>\n<\/ul>\n<h4>\u6307\u9488\u8fd0\u7b97\u7b26<\/h4>\n<ul>\n<li>*\u6307\u9488\u8fd0\u7b97\u7b26,\u7528\u4e8e\u628a\u6307\u9488\u6307\u5411\u53d8\u91cf,\u53ef\u7528\u4e8e\u83b7\u53d6\u53d8\u91cf\u7684\u503c<\/li>\n<li>&amp;\u53d6\u5740\u8fd0\u7b97\u7b26,\u7528\u4e8e\u83b7\u53d6\u53d8\u91cf\u7684\u5730\u5740<\/li>\n<li>*(&amp;a)\u548c&amp;(*a)\u7684\u6548\u679c\u76f8\u540c,\u90fd\u662f\u83b7\u53d6\u53d8\u91cf\u7684\u5730\u5740,\u53ea\u662f\u5904\u7406\u7684\u6b21\u5e8f\u4e0d\u540c<\/li>\n<\/ul>\n<p>\u4f8b\u5b50:<\/p>\n<pre>#include &amp;lt;iostream&amp;gt;\nint main(){\nint *a,i=100;\nprintf(\"a\u7684\u4f4d\u7f6e%p,i\u7684\u503c:%d\\n\",a,i);\na=&amp;amp;i;\nprintf(\"a\u7684\u4f4d\u7f6e%p,a\u7684\u503c\u662f%d\\n\",&amp;amp;a,*a);\n}\n<\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-223\" src=\"https:\/\/103.249.111.182\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-1024x190.jpg\" sizes=\"auto, (max-width: 525px) 85vw, 525px\" srcset=\"https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-1024x190.jpg 1024w, https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-300x56.jpg 300w, https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-768x142.jpg 768w, https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-1536x285.jpg 1536w, https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018-1200x222.jpg 1200w, https:\/\/7gugu.com\/wp-content\/uploads\/2018\/12\/QQ\u622a\u56fe20181206205018.jpg 1926w\" alt=\"\" width=\"525\" height=\"97\" \/><\/p>\n<hr \/>\n<h4>\u4e3a\u4ec0\u4e48\u8981\u6307\u5b9a\u6307\u9488\u53d8\u91cf\u7684\u7c7b\u578b?<\/h4>\n<p>\u6307\u9488\u53d8\u91cf\u4e0d\u4ec5\u4ec5\u662f\u8981\u5b58\u50a8\u53d8\u91cf\u7684\u5730\u5740,\u540c\u65f6\u4e5f\u8981\u8bb0\u5f55\u53d8\u91cf\u7684\u7a7a\u95f4\u5927\u5c0f\u3002<br \/>\n\u56e0\u4e3aC\u8bed\u8a00\u4f20\u9012\u53d8\u91cf\u65f6\u9700\u8981\u628a\u6570\u636e\u4f20\u5165\u5df2\u786e\u5b9a\u7684\u5185\u5b58\u5730\u5740\u53ca\u5176\u6240\u5360\u7684\u7a7a\u95f4,<br \/>\n\u6240\u4ee5\u4e00\u4e2achar\u7c7b\u578b\u7684\u6307\u9488\u4e0d\u53ef\u4ee5\u76f4\u63a5\u6307\u5411\u4e00\u4e2aint\u578b\u7684\u53d8\u91cf,\u5982\u679c\u5f3a\u5236\u64cd\u4f5c\u5c06\u4f1a\u5bfc\u81f4\u8d8a\u754c\u7684bug\u3002<\/p>\n<hr \/>\n<h4>\u6307\u9488\u504f\u79fb:<\/h4>\n<pre>#include &amp;lt;iostream&amp;gt;\nvoid main() {\n\tint *a[3];\/\/\u521d\u59cb\u5316\u6574\u578b\u6307\u9488\n\tint b[3] = { 1,2,3 };\n\ta[0] = &amp;amp;b[0];\/\/\u5c06b[0]\u7684\u5730\u5740\u8d4b\u503c\u7ed9a[0]\u5b58\u50a8\n\ta[1] = &amp;amp;b[1];\n\ta[2] = &amp;amp;b[2];\n\tprintf(\"a\u7684\u539f\u6765\u6307\u5411\u7684\u503c%d\\n\", **a);\/\/*a\u4ec5\u4ec5\u662f\u83b7\u53d6\u5230b\u7684\u5730\u5740,**a\u624d\u662f\u83b7\u53d6\u5230b\u7684\u503c\n\tprintf(\"a\u7684\u53d8\u5316\u540e\u6307\u5411\u7684\u503c%d\\n\", **(a+1));\/\/a+1\u6307\u7684\u662fa[1]\u7136\u540e\u518d\u91cd\u590d\u4e0a\u4e00\u884c\u7684\u64cd\u4f5c\n}\n<\/pre>\n<h4>\u6307\u9488\u6307\u5411\u591a\u7ef4\u6570\u7ec4<\/h4>\n<pre>#include &amp;lt;iostream&amp;gt;\nvoid main(){\nint a[3][3]={1,2,3,4,5,6,7,8,9};\nint *b[3];\nb[0]=a[0];\/\/\u5728\u591a\u7ef4\u6570\u7ec4\u4e2d,b[0]=a[0]\u4f1a\u81ea\u52a8\u6307\u5411a[0]\u7684\u5730\u5740,\u4e0d\u7528\u50cf\u4e00\u7ef4\u6570\u7ec4,\u4f7f\u7528\u53d6\u5740\u7b26\u6307\u5411a[0]\nb[1]=a[1];\nb[2]=a[2];\nprintf(\"a[1][2]\u7684\u503c%d\\n\",*(*(b+1)+2));\/\/\u73b0\u5c06b\u6307\u5411b[1],\u7136\u540e\u5c06b[1]\u6307\u5411b[1][2]\n}\n<\/pre>\n<hr \/>\n<h4>\u4e3a\u5565\u6307\u9488\u6307\u5411\u4e00\u7ef4\u6570\u7ec4\u65f6,\u9700\u8981\u4f7f\u7528\u53d6\u5740\u7b26,\u4f46\u662f\u6307\u5411\u591a\u7ef4\u6570\u7ec4\u65f6\u7684\u7b2c\u4e00\u7ef4\u65f6\u4e0d\u7528\u53d6\u5740\u7b26?<\/h4>\n<p>\u56e0\u4e3a\u6307\u9488\u6307\u5411\u4e00\u7ef4\u6570\u7ec4\u65f6,b[0]\u4ee3\u8868\u7684\u662f\u4e00\u4e2a\u503c,\u800c\u4e0d\u662f\u4e00\u4e2a\u5730\u5740,\u6240\u4ee5\u9700\u8981\u4f7f\u7528\u53d6\u5740\u7b26\u6765\u83b7\u53d6\u8fd9\u4e2a\u503c\u5f97\u5730\u5740,<br \/>\n\u4f46\u662f\u5f53\u6307\u9488\u6307\u5411\u4e8c\u7ef4\u6570\u7ec4\u65f6,b[0]\u7684\u8eab\u4efd\u662f\u4e00\u4e2a\u5730\u5740,\u6240\u4ee5\u5c31\u4e0d\u7528\u4f7f\u7528\u53d6\u5740\u7b26\u5c31\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5230\u5730\u5740\u4e86\u3002<\/p>\n<hr \/>\n<h4>One More Thing<\/h4>\n<p>\u6570\u7ec4p[i]\u662fc\u8bed\u8a00\u4e2d\u7684\u4e00\u79cd\u8bed\u6cd5\u7cd6<br \/>\n\u5373\u4f7f\u51fd\u6570\u88ab\u8bbe\u8ba1\u6210void fun(int array[5], int n)\uff0carray\u4f9d\u7136\u88ab\u770b\u6210\u662f\u6307\u9488\u3002\u4e5f\u5c31\u662f\u8bf4\u5373\u4f7f\u6570\u7ec4\u5e26\u4e86\u957f\u5ea6\uff0c\u8be5\u957f\u5ea6\u4e5f\u4f1a\u88ab\u7f16\u8bd1\u5668\u5ffd\u7565\u6389\u3002(\u5373:a[i]=&gt;*(a+i))<br \/>\n\u4e00\u53e5\u8bdd\uff1a\u5f62\u53c2\u4e2d\u7684\u6570\u7ec4\u7edf\u7edf\u770b\u6210\u6307\u9488\u3002<br \/>\n\u65e2\u7136\u5982\u6b64\uff0c\u8fd8\u4e0d\u5982\u76f4\u63a5\u5199\u6210void fun(int *array, int n)\u3002\u6307\u9488\u7684\u5f62\u5f0f\uff0c\u66f4\u80fd\u8868\u8fbe\u672c\u610f\u3002<\/p>\n<p>array\u548c&amp;array\u90fd\u662f\u6307\u9488\uff0c\u4f46\u7c7b\u578b\u4e0d\u540c\u3002array\u7684\u7c7b\u578b\u662fint*\uff0c\u800c&amp;array\u7684\u7c7b\u578b\u662fint(*)[2]\u3002array\u662f\u6307\u5411\u666e\u901aint\u7c7b\u578b\u7684\u6307\u9488\uff1b&amp;array\u662f\u6570\u7ec4\u6307\u9488\uff0c\u8be5\u6570\u7ec4\u5143\u7d20\u662fint\u7c7b\u578b\u7684\uff0c\u4e14\u6570\u7ec4\u5927\u5c0f\u662f2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u8bed\u8a00\u5b66\u4e60\u5c0f\u7ed3: \u6307\u9488\u7684\u521d\u59cb\u5316 \u6307\u9488\u53d8\u91cf\u53ef\u4ee5\u521d\u59cb\u5316\u4e3a0,NULL\u6216\u4e00\u4e2a\u5730\u5740[16\u8fdb\u5236] 0\u548cNULL\u7b49\u4ef7,\u76f8\u5f53 &hellip; <a href=\"https:\/\/7gugu.com\/index.php\/2018\/12\/06\/%e7%ac%94%e8%ae%b0c%e8%af%ad%e8%a8%80%e6%8c%87%e9%92%88%e5%ad%a6%e4%b9%a0%e5%b0%8f%e7%bb%9320181206\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201c[\u7b14\u8bb0][C\u8bed\u8a00]\u6307\u9488\u5b66\u4e60\u5c0f\u7ed3[20181206]\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,29,13],"tags":[],"class_list":["post-222","post","type-post","status-publish","format-standard","hentry","category-c","category-29","category-13"],"_links":{"self":[{"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/posts\/222","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/comments?post=222"}],"version-history":[{"count":1,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/posts\/222\/revisions"}],"predecessor-version":[{"id":3616,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/posts\/222\/revisions\/3616"}],"wp:attachment":[{"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/media?parent=222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/categories?post=222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/7gugu.com\/index.php\/wp-json\/wp\/v2\/tags?post=222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}