{"id":393,"date":"2020-04-05T22:10:34","date_gmt":"2020-04-05T14:10:34","guid":{"rendered":"https:\/\/www.notown.club\/?p=393"},"modified":"2023-05-29T10:21:04","modified_gmt":"2023-05-29T02:21:04","slug":"c%e5%8a%a8%e6%80%81%e5%86%85%e5%ad%98%ef%bc%88%e7%ac%94%e8%ae%b0%e4%ba%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=393","title":{"rendered":"C++\u52a8\u6001\u5185\u5b58\uff08\u7b14\u8bb0\u4e8c\uff09"},"content":{"rendered":"\n

\u4e00\u3001\u76f4\u63a5\u5185\u5b58\u7ba1\u7406<\/strong><\/p>\n\n\n\n

c++\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e24\u4e2a\u8fd0\u7b97\u7b26\u6765\u5206\u914d\u548c\u91ca\u653e\u52a8\u6001\u5185\u5b58\u3002\u8fd0\u7b97\u7b26new\u5206\u914d\u5185\u5b58\uff0cdelete\u91ca\u653enew\u5206\u914d\u7684\u5185\u5b58\u3002<\/p>\n\n\n\n

\u4f7f\u7528new\u52a8\u6001\u5206\u914d\u548c\u521d\u59cb\u5316\u5bf9\u8c61
int *pi =new int;\/\/\u5728\u81ea\u7531\u7a7a\u95f4\u6784\u9020\u4e00\u4e2aint\u578b\u5bf9\u8c61\uff0c\u5e76\u8fd4\u56de\u6307\u5411\u5bf9\u8c61\u7684\u6307\u9488\u3002<\/code>
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u52a8\u6001\u5206\u914d\u7684\u5bf9\u8c61\u662f\u9ed8\u8ba4\u521d\u59cb\u5316\u7684\uff0c\u5373\u4e0a\u9762\u7684pi\u6307\u5411\u4e00\u4e2a\u672a\u521d\u59cb\u5316\u7684int(\u8bfb\u503c\u5373\u51fa\u9519)
int *pi =new int();\/\/\u4f46\u52a0\u4e2a\u62ec\u53f7\u5c31\u662f\u503c\u521d\u59cb\u5316\uff0c\u867d\u7136\u62ec\u53f7\u91cc\u9762\u6ca1\u503c\uff0c\u4f46\u662f\u4f1a\u76f8\u5f53\u4e8e*pi\u8d4b0\u3002<\/code><\/p>\n\n\n\n

\u53ef\u4ee5\u4f7f\u7528\u76f4\u63a5\u521d\u59cb\u5316
int *pi=new int(1024);\/\/pi\u6307\u5411\u7684\u5bf9\u8c61\u7684\u503c\u4e3a1024
string *ps =new string(10,\u20199\u2019);ps\u6307\u5411\u7684\u503c\u4e3a\u201d 9999999999\u201d<\/code><\/p>\n\n\n\n

\u4e3a\u4e86\u9632\u6b62\u5185\u5b58\u8017\u5c3d\uff0c\u5728\u52a8\u6001\u5185\u5b58\u4f7f\u7528\u5b8c\u6bd5\u540e\uff0c\u5fc5\u987b\u5c06\u5176\u5f52\u8fd8\u7ed9\u7cfb\u7edf\u3002\u6211\u4eec\u901a\u8fc7delete\u8868\u8fbe\u5f0f\u6765\u5c06\u52a8\u6001\u5185\u5b58\u5f52\u8fd8\u7ed9\u7cfb\u7edf\u3002delete\u8868\u8fbe\u5f0f\u63a5\u53d7\u4e00\u4e2a\u6307\u9488\uff0c\u6307\u5411\u6211\u4eec\u60f3\u8981\u91ca\u653e\u7684\u5bf9\u8c61\u3002
delete p;\/\/p\u5fc5\u987b\u6307\u5411\u4e00\u4e2a\u52a8\u6001\u5206\u914d\u7684\u5bf9\u8c61\u6216\u662f\u4e00\u4e2a\u7a7a\u6307\u9488<\/p>\n\n\n\n

\u4e8c\u3001\u52a8\u6001\u6570\u7ec4<\/strong><\/p>\n\n\n\n

int *pia = new int[get_size()];<\/code>\n\/\/pia\u6307\u5411\u7b2c\u4e00\u4e2aint\uff0cget_size\u662f\u4e00\u4e2a\u80fd\u8fd4\u56de\u9700\u8981\u521b\u5efa\u7684\u6570\u7ec4\u7684\u5927\u5c0f\u7684\u51fd\u6570<\/code><\/pre>\n\n\n\n
\u91ca\u653e\u52a8\u6001\u6570\u7ec4
\u4e3a\u4e86\u91ca\u653e\u52a8\u6001\u6570\u7ec4\uff0c\u6211\u4eec\u4f7f\u7528\u4e00\u79cd\u7279\u6b8a\u5f62\u5f0f\u7684delete\uff08\u5c31\u662f\u5728delete\u540e\u9762\u52a0\u4e0a\u4e00\u4e2a\u7a7a\u62ec\u53f7\uff09
 delete p;\/\/p\u5fc5\u987b\u6307\u5411\u4e00\u4e2a\u52a8\u6001\u5206\u914d\u7684\u5bf9\u8c61\u6216\u4e3a\u7a7a<\/code>
 delete [] pa;\/\/pa\u5fc5\u987b\u6307\u5411\u4e00\u4e2a\u52a8\u6001\u5206\u914d\u7684\u6570\u7ec4\u6216\u4e3a\u7a7a<\/code><\/p>\n\n\n\n
\u52a8\u6001\u5206\u914d\u4e0e\u91ca\u653e\u4e8c\u7ef4\u6570\u7ec4<\/strong><\/p>\n\n\n\n
\u2460\u4e24\u7ef4\u90fd\u4e0d\u6e05\u695a\u65f6<\/p>\n\n\n\n
int *a = NULL;\/\/\u6307\u9488\u7684\u6307\u9488<\/code>
int Xlength, Ylength;<\/code>
cin >> Xlength >> Ylength;\/\u4e8c\u7ef4\u6570\u7ec4\u7684\u52a8\u6001\u5206\u914d*\/
a = new int *[Xlength];
for (int i = 0; i < Xlength; i++)
    a[i] = new int[Ylength];
\/\u91ca\u653e\/
for (int i = 0; i < Xlength; i++)
    delete [] a[i];
delete a;<\/code><\/pre>\n\n\n\n
\u2461\u5f53\u77e5\u9053\u7b2c\u4e8c\u7ef4y=2\u65f6\uff0c<\/p>\n\n\n\n
int (*p)[2]=new int[x][2];\/\/\u7b49\u53f7\u5de6\u8fb9\u4e3a\u521b\u5efa\u4e00\u4e2a\u6307\u9488\uff0c\u5b83\u6307\u5411\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53f3\u8fb9\u5c31\u6709\u70b9\u7eb5\u5411\u6269\u5c55\u7684\u610f\u601d\u3002
 delete[] p;<\/code><\/p>\n\n\n\n
\u2462\u5f53\u77e5\u9053\u7b2c\u4e00\u7ef4x=4\u65f6\uff0c<\/p>\n\n\n\n
int *p[4];\/\/\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4p\uff0c\u5b83\u6709\u56db\u4e2aint\u6307\u9488\u5143\u7d20
for (int i = 0; i < 4; ++i)
{
    p[i] = new int[y];\/\/\u6bcf\u4e2a\u6307\u9488\u5206\u914d\u5185\u5b58
}
for (int i = 0; i < 4; ++i)
{
         delete[] p[i];<\/code>
}<\/code><\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001\u76f4\u63a5\u5185\u5b58\u7ba1\u7406 c++\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e24\u4e2a\u8fd0\u7b97\u7b26\u6765\u5206\u914d\u548c\u91ca\u653e\u52a8\u6001\u5185\u5b58\u3002\u8fd0\u7b97\u7b26new\u5206\u914d\u5185\u5b58\uff0cdelete\u91ca\u653enew…Continue reading C++\u52a8\u6001\u5185\u5b58\uff08\u7b14\u8bb0\u4e8c\uff09<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-393","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=393"}],"version-history":[{"count":10,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/393\/revisions"}],"predecessor-version":[{"id":636,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/393\/revisions\/636"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}