{"id":2053,"date":"2010-02-17T02:00:02","date_gmt":"2010-02-16T18:00:02","guid":{"rendered":"http:\/\/wp.chunhsin.idv.tw\/?p=2053"},"modified":"2010-02-18T21:41:07","modified_gmt":"2010-02-18T13:41:07","slug":"%e5%be%9ec%e5%88%b0c%e5%ad%b8%e7%bf%92%e5%bf%83%e5%be%97","status":"publish","type":"post","link":"https:\/\/wp.chunhsin.idv.tw\/?p=2053","title":{"rendered":"\u5f9eC\u5230C++\u5b78\u7fd2\u5fc3\u5f97"},"content":{"rendered":"
1.\u5ba3\u544a\u8b8a\u6578<\/h5>\n

\u53ef\u5728\u4efb\u610f\u4f4d\u7f6e\u5ba3\u544a\u8b8a\u6578\u3002\u6307\u5b9a\u521d\u503c\u9664\u4e86\u4f7f\u7528\u6307\u5b9a\u6558\u8ff0\uff0c\u4e5f\u53ef\u4ee5\u5728\u62ec\u865f\u4e2d\u6307\u5b9a\u521d\u503c\u3002<\/p>\n

\u5982\uff1a<\/p>\n

\n

int a (10);
\nint b=20;<\/p>\n<\/blockquote>\n

2.\u578b\u614b\u8f49\u63db<\/h5>\n

\u9664\u4e86\u652f\u63f4C\u7684\u5f37\u8feb\u578b\u614b\u8f49\u63db\u7684\u65b9\u5f0f\u5916\uff0cC++\u65b0\u589e\u4e00\u7a2e\u578b\u614b\u8f49\u63db\u65b9\u5f0f\uff1a<\/p>\n

int i;
\nfloat f=3.1415;
\ni = int (f);<\/p><\/blockquote>\n

3.\u578b\u614b\u8feb\u63db\u904b\u7b97\u5b50<\/h5>\n

\u4e3b\u8981\u662f\u7528\u5728\u985e\u5225\u7684\u578b\u614b\u8f49\u63db\uff0c\u53e6\u6709\u4e00\u7a2estatic_cast\u53ef\u7528\u5728\u57fa\u672c\u578b\u614b\u7684\u8f49\u63db\uff0c\u4f46\u6bd4\u8d77\u50b3\u7d71\u8f49\u63db\u65b9\u5f0f\u8981\u9ebb\u7169\u5f97\u591a\uff0c\u61c9\u8a72\u9084\u662f\u4e0d\u5e38\u7528\u624d\u662f\u3002<\/p>\n

(1)reinsterpret_cast<\/p>\n

(2)static_cast<\/p>\n

(3)dynamic_cast<\/p>\n

(4)const_cast<\/p>\n

\u5176\u4e2d\u7684static_cast\u4e5f\u53ef\u4f7f\u7528\u5728\u57fa\u672c\u8cc7\u6599\u578b\u614b\u7684\u8f49\u63db\u3002\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

static_cast<\u57fa\u672c\u8cc7\u6599\u578b\u614b>(\u904b\u7b97\u5f0f);<\/p>\n

ex:<\/p>\n

\n

double pi=3.14159265;<\/p>\n

int j=static_cast<int>(pi);<\/p>\n<\/blockquote>\n

4.\u6a94\u982d\u6a94<\/h5>\n

\u5728C++\u7a0b\u5f0f\u542b\u62ec<iostream>\u6a19\u982d\u6a94\u5c31\u53ef\u4ee5\u4f7f\u7528cin\u548ccout\u7269\u4ef6\u4f86\u8f38\u5165\u548c\u8f38\u51fa\u8cc7\u6599\u3002cin\u548ccout\u7684c\u4ee3\u8868\u63a7\u5236\u53f0\uff0c\u5373console\uff0c\u6b64\u5169\u500b\u7269\u4ef6\u662fC++\u63d0\u4f9b\u7528\u4f86\u53d6\u4ee3C\u7684\u6a19\u6e96\u8f38\u5165\u51fd\u6578scanf\u53caprintf\u3002<\/p>\n

5.\u53c3\u8003\u8b8a\u6578<\/h5>\n

\u53c3\u8003\u8b8a\u6578\u5c31\u662f\u8b8a\u6578\u7684\u5225\u540d\u3002\u5ba3\u544a\u65b9\u5f0f\uff1a<\/p>\n

int &ref=num;<\/p><\/blockquote>\n

\u9019\u6a23\u5c31\u4ee3\u8868ref\u662fnum\u7684\u5225\u540d\uff0c\u7576\u6307\u5b9aref\u7684\u503c\u6642\uff0cnum\u7684\u503c\u4e5f\u6703\u8b8a\uff0c\u53cd\u4e4b\u76f8\u540c\u3002<\/p>\n

6.\u7bc4\u570d\u904b\u7b97\u5b50::<\/h5>\n

\u5728C\u88e1\u9762\uff0c\u540c\u540d\u7684\u5168\u57df\u8b8a\u6578\u53ca\u5340\u57df\u8b8a\u6578\u4e0d\u80fd\u540c\u6642\u5728\u540c\u4e00\u5340\u584a\u88e1\u4f7f\u7528\uff0c\u5728C++\u88e1\u53ef\u4f7f\u7528\u7bc4\u570d\u904b\u7b97\u5b50\u4f86\u5b58\u53d6\u5168\u57df\u8b8a\u6578\uff0c\u4f7f\u7528\u65b9\u5f0f\u5c31\u662f\u5728\u8b8a\u6578\u540d\u7a31\u524d\u52a0\u4e0a::\u5373\u53ef\uff0c\u4f8b\u5982\uff1a<\/p>\n

::myvar<\/p><\/blockquote>\n

7.\u904e\u8f09\u51fd\u6578<\/h5>\n

C++\u53ef\u64c1\u6709\u5169\u500b\u4ee5\u4e0a\u7684\u540c\u540d\u51fd\u6578\uff0c\u53ea\u9700\u8981\u9019\u4e9b\u51fd\u6578\u5728\u50b3\u5165\u53c3\u6578\u7684\u500b\u6578\u4e0d\u540c\u6216\u8cc7\u6599\u578b\u614b\u4e0d\u540c\u5373\u53ef\u3002\u800c\u9019\u4e9b\u540c\u540d\u51fd\u6578\u5c31\u7a31\u70ba\u904e\u8f09\u3002<\/p>\n

\u904e\u7a0b\u51fd\u6578\u56e0\u70ba\u540c\u540d\uff0c\u61c9\u8a72\u7528\u5728\u76f8\u540c\u7528\u9014\u4e0a\u3002\u5dee\u5225\u5728\u65bc\u547c\u53eb\u51fd\u6578\u6642\u7684\u50b3\u5165\u53c3\u6578\u4e0d\u540c\u6216\u8cc7\u6599\u578b\u614b\u4e0d\u540c\u3002<\/p>\n

8.inline\u51fd\u6578<\/h5>\n

\u76f4\u63a5\u5728\u547c\u53eb\u51fd\u6578\u7684\u7a0b\u5f0f\u5217\u5c55\u958b\u51fd\u6578\u5167\u5bb9\uff0c\u7528\u5728\u5c0f\u578b\u4e14\u547c\u53eb\u983b\u7e41\u7684\u51fd\u6578\u3002\u5ba3\u544ainline\u51fd\u6578\u53ea\u9700\u8981\u5728\u5ba3\u544a\u51fd\u6578\u90a3\u4e00\u5217\u6700\u524d\u9762\u52a0\u4e0ainline\u5373\u53ef\uff0c\u5982<\/p>\n

inline int getMax(int, int);<\/p><\/blockquote>\n

9.\u9810\u8a2d\u7684\u51fd\u6578\u53c3\u6578\u503c<\/h5>\n

\u9810\u8a2d\u7684\u51fd\u6578\u53c3\u6578\u503c\u53ea\u80fd\u5728\u539f\u578b\u5ba3\u544a\u6642\u52a0\u4e0a\uff0c\u51fd\u6578\u5b9a\u7fa9\u6642\u4e0d\u53ef\u52a0\u9810\u8a2d\u503c\u3002\u53e6\u5916\uff0c\u9810\u8a2d\u503c\u53ea\u53ef\u52a0\u5728\u53c3\u6578\u5217\u7684\u6700\u5f8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

1.\u5ba3\u544a\u8b8a\u6578 \u53ef\u5728\u4efb\u610f\u4f4d\u7f6e\u5ba3\u544a\u8b8a\u6578\u3002\u6307\u5b9a\u521d\u503c\u9664\u4e86\u4f7f\u7528\u6307\u5b9a\u6558\u8ff0\uff0c\u4e5f\u53ef\u4ee5\u5728\u62ec\u865f\u4e2d\u6307\u5b9a\u521d\u503c\u3002 \u5982\uff1a int a (1 … \u95b1\u8b80\u5168\u6587\u3008\u5f9eC\u5230C++\u5b78\u7fd2\u5fc3\u5f97\u3009<\/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":[172],"tags":[173],"class_list":["post-2053","post","type-post","status-publish","format-standard","hentry","category-cc","tag-173"],"_links":{"self":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/2053","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2053"}],"version-history":[{"count":7,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/2053\/revisions"}],"predecessor-version":[{"id":2066,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/2053\/revisions\/2066"}],"wp:attachment":[{"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.chunhsin.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}