{"id":215,"date":"2023-08-18T18:04:49","date_gmt":"2023-08-18T10:04:49","guid":{"rendered":"http:\/\/blog.xjfvps.top\/index.php\/2023\/08\/18\/%e3%80%8ac%e5%a4%a7%e5%ad%a6%e6%95%99%e7%a8%8b%e3%80%8b%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0-%ef%bc%88%e7%ac%ac13%e7%ab%a0-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%ef%bc%89\/"},"modified":"2023-08-18T21:25:32","modified_gmt":"2023-08-18T13:25:32","slug":"%e3%80%8ac%e5%a4%a7%e5%ad%a6%e6%95%99%e7%a8%8b%e3%80%8b%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0-%ef%bc%88%e7%ac%ac13%e7%ab%a0-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%ef%bc%89","status":"publish","type":"post","link":"https:\/\/blog.fs.cloudns.biz\/index.php\/2023\/08\/18\/%e3%80%8ac%e5%a4%a7%e5%ad%a6%e6%95%99%e7%a8%8b%e3%80%8b%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0-%ef%bc%88%e7%ac%ac13%e7%ab%a0-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%ef%bc%89\/","title":{"rendered":"\u300ac++\u5927\u5b66\u6559\u7a0b\u300b\u8bfb\u4e66\u7b14\u8bb0 \uff08\u7b2c13\u7ae0 \u5f02\u5e38\u5904\u7406\uff09"},"content":{"rendered":"


      \u8fd9\u4e00\u7ae0\u6240\u4ecb\u7ecd\u7684\u4f3c\u4e4e\u7b80\u7565\u4e86\u4e00\u4e9b\u3002\u5f53\u7136\uff0c\u6211\u4e5f\u4e0d\u77e5\u8be5\u600e\u4e48\u6837\u5199\u624d\u7b97\u8bf4\u5f97\u6e05\u695a\uff0c\u6bd5\u7adf\u6211\u624d\u521d\u5b66C++\uff0c\u53ea\u662f\u770b\u5f97\u6211\u4e0d\u592a\u723d\uff0c\u6709\u4e9b\u5730\u65b9\u4e0d\u660e\u767d\u3002

\u8fd9\u7ae0\u603b\u7684\u6709\u4e24\u70b9\u4e0d\u8db3\uff1a1.\u8bf4\u5f97\u4e0d\u591f\u6df1\u5165\u30022.\u4f8b\u5b50\u4e0d\u591f\u7cbe\u8f9f\u3002

      \u5176\u4e2d\u6709\u4e2a\u4f8b\u5b50\uff08\u56e0\u4e3a\u5185\u5b58\u6bd4\u8f83\u5927\uff0c\u505a\u4e86\u70b9\u4fee\u6539\uff09\u6211\u5728\u4e0a\u673a\u7684\u65f6\u5019\u5c31\u53d1\u751f\u9519\u8bef\uff0cabort\u4e86\u3002\u4e00\u5f00\u59cb\u5c31new\u5931\u8d25\u3002\uff08VC6.0)

\n


\n
#include <\/SPAN><<\/SPAN>iostream<\/SPAN>><\/SPAN>
#include <\/SPAN><<\/SPAN>new<\/SPAN>><\/SPAN>
<\/SPAN>using<\/SPAN> <\/SPAN>namespace<\/SPAN> std;


<\/SPAN>void<\/SPAN> customNewHandler()
<\/SPAN><\/SPAN>{
    cerr<\/SPAN><<<\/SPAN>“<\/SPAN>customNewHandler was called <\/SPAN>“<\/SPAN>    abort();
}<\/SPAN><\/SPAN>

<\/SPAN>int<\/SPAN> main()
<\/SPAN><\/SPAN>{
    <\/SPAN>double<\/SPAN> <\/SPAN>*<\/SPAN>ptr[<\/SPAN>9999<\/SPAN>    set_new_handler(customNewHandler);

    

        <\/SPAN>for<\/SPAN>(<\/SPAN>int<\/SPAN> i<\/SPAN>=<\/SPAN>0<\/SPAN><9999<\/SPAN>++<\/SPAN>)
     <\/SPAN>{
            ptr[i]<\/SPAN>=<\/SPAN>new<\/SPAN> <\/SPAN>double<\/SPAN>[<\/SPAN>5000000<\/SPAN>
            cout<\/SPAN><<<\/SPAN>“<\/SPAN>Allocated 5000000 double s in ptr[<\/SPAN>“<\/SPAN><<<\/SPAN>i<\/SPAN><<<\/SPAN>“<\/SPAN>]n<\/SPAN>“<\/SPAN>        }<\/SPAN><\/SPAN>
    



    <\/SPAN>return<\/SPAN> <\/SPAN>0<\/SPAN>
}<\/SPAN><\/SPAN><\/DIV><\/DIV>
       \u8ddf\u8e2a\u4e00\u4e0b\uff0c\u53d1\u73b0\u5728set_new_handler(customNewHandler)\u5c31\u51fa\u9519\u4e86\u3002\u4f46\u7528VC7\u548cgcc\u7f16\u8bd1\u540e\u8fd0\u884c\u6b63\u5e38\uff0c\u7ed3\u679c\u5747\u5982\u4e0b\uff1a
Allocated 5000000 double s in ptr[0]
Allocated 5000000 double s in ptr[1]
Allocated 5000000 double s in ptr[2]
Allocated 5000000 double s in ptr[3]
Allocated 5000000 double s in ptr[4]
Allocated 5000000 double s in ptr[5]
Allocated 5000000 double s in ptr[6]
Allocated 5000000 double s in ptr[7]
Allocated 5000000 double s in ptr[8]
Allocated 5000000 double s in ptr[9]
Allocated 5000000 double s in ptr[10]
Allocated 5000000 double s in ptr[11]
Allocated 5000000 double s in ptr[12]
Allocated 5000000 double s in ptr[13]
Allocated 5000000 double s in ptr[14]
Allocated 5000000 double s in ptr[15]
Allocated 5000000 double s in ptr[16]
Allocated 5000000 double s in ptr[17]
Allocated 5000000 double s in ptr[18]
Allocated 5000000 double s in ptr[19]
Allocated 5000000 double s in ptr[20]
Allocated 5000000 double s in ptr[21]
Allocated 5000000 double s in ptr[22]
Allocated 5000000 double s in ptr[23]
Allocated 5000000 double s in ptr[24]
Allocated 5000000 double s in ptr[25]
Allocated 5000000 double s in ptr[26]
Allocated 5000000 double s in ptr[27]
customNewHandler was called
<\/SPAN>
     \u53e6\u4e00\u4e2a\u4f8b\u5b50\u662f\u6d4b\u8bd5new\u6545\u969c\u629b\u51fabad_alloc\u5f02\u5e38\u3002

\n

\n
#include <\/SPAN><<\/SPAN>iostream<\/SPAN>><\/SPAN>
#include <\/SPAN><<\/SPAN>new<\/SPAN>><\/SPAN>
<\/SPAN>using<\/SPAN> <\/SPAN>namespace<\/SPAN> std;


<\/SPAN>int<\/SPAN> main()
<\/SPAN><\/SPAN>{
    <\/SPAN>double<\/SPAN> <\/SPAN>*<\/SPAN>ptr[<\/SPAN>9999<\/SPAN>

    <\/SPAN>try<\/SPAN>
    <\/SPAN><\/SPAN>{
        <\/SPAN>for<\/SPAN>(<\/SPAN>int<\/SPAN> i<\/SPAN>=<\/SPAN>0<\/SPAN><<\/SPAN>9999<\/SPAN>++<\/SPAN>)
        <\/SPAN><\/SPAN>{
            ptr[i]<\/SPAN>=<\/SPAN>new<\/SPAN> <\/SPAN>double<\/SPAN>[<\/SPAN>5000000<\/SPAN>
            cout<\/SPAN><<<\/SPAN>“<\/SPAN>Allocated 5000000 double s in ptr[<\/SPAN>“<\/SPAN><<<\/SPAN>i<\/SPAN><<<\/SPAN>“<\/SPAN>]n<\/SPAN>“<\/SPAN>        }<\/SPAN><\/SPAN>
    }<\/SPAN><\/SPAN>
    <\/SPAN>catch<\/SPAN>(bad_alloc <\/SPAN>&<\/SPAN>ex)
    <\/SPAN><\/SPAN>{
        cout<\/SPAN><<<\/SPAN>“<\/SPAN>Exception occurred:<\/SPAN>“<\/SPAN>
            <\/SPAN><<<\/SPAN>ex.what()<\/SPAN><<<\/SPAN>endl;
    }<\/SPAN><\/SPAN>


    <\/SPAN>return<\/SPAN> <\/SPAN>0<\/SPAN>
}<\/SPAN><\/SPAN>
<\/SPAN><\/DIV><\/DIV>
\n


       \u5728VC6.0\u7f16\u8bd1\u8fd0\u884c\u65f6\uff0c\u4e0d\u77e5\u8bf4\u5b83\u806a\u660e\u8fd8\u662f\u50bb\uff0c\u7adf\u7136\u5206\u914d\u52309998\u4e2a\u6570\u7ec4\uff0c\u7528\u4e86\u7cfb\u7edf\u865a\u62df\u5185\u5b58\u3002\u6240\u4ee5\u770b\u4e0d\u5230\u629b\u51fa\u5f02\u5e38\u7684\u7ed3\u679c\u3002

\u800c\u5728gcc\u548cVC7\u4e0a\u90fd\u5f97\u5230\u6ee1\u610f\u7b54\u6848\u3002gcc\u7ed3\u679c\u5982\u4e0b\uff1a

Allocated 5000000 double s in ptr[0]
Allocated 5000000 double s in ptr[1]
Allocated 5000000 double s in ptr[2]
Allocated 5000000 double s in ptr[3]
Allocated 5000000 double s in ptr[4]
Allocated 5000000 double s in ptr[5]
Allocated 5000000 double s in ptr[6]
Allocated 5000000 double s in ptr[7]
Allocated 5000000 double s in ptr[8]
Allocated 5000000 double s in ptr[9]
Allocated 5000000 double s in ptr[10]
Allocated 5000000 double s in ptr[11]
Allocated 5000000 double s in ptr[12]
Allocated 5000000 double s in ptr[13]
Allocated 5000000 double s in ptr[14]
Allocated 5000000 double s in ptr[15]
Allocated 5000000 double s in ptr[16]
Allocated 5000000 double s in ptr[17]
Allocated 5000000 double s in ptr[18]
Allocated 5000000 double s in ptr[19]
Allocated 5000000 double s in ptr[20]
Allocated 5000000 double s in ptr[21]
Allocated 5000000 double s in ptr[22]
Allocated 5000000 double s in ptr[23]
Allocated 5000000 double s in ptr[24]
Allocated 5000000 double s in ptr[25]
Allocated 5000000 double s in ptr[26]
Allocated 5000000 double s in ptr[27]
Exception occurred:St9bad_alloc<\/SPAN><\/P>
\n

  VC7\u7ed3\u679c\u5982\u4e0b\uff1a
Allocated 5000000 double s in ptr[0]
Allocated 5000000 double s in ptr[1]
Allocated 5000000 double s in ptr[2]
Allocated 5000000 double s in ptr[3]
Allocated 5000000 double s in ptr[4]
Allocated 5000000 double s in ptr[5]
Allocated 5000000 double s in ptr[6]
Allocated 5000000 double s in ptr[7]
Allocated 5000000 double s in ptr[8]
Allocated 5000000 double s in ptr[9]
Allocated 5000000 double s in ptr[10]
Allocated 5000000 double s in ptr[11]
Allocated 5000000 double s in ptr[12]
Allocated 5000000 double s in ptr[13]
Allocated 5000000 double s in ptr[14]
Allocated 5000000 double s in ptr[15]
Allocated 5000000 double s in ptr[16]
Allocated 5000000 double s in ptr[17]
Allocated 5000000 double s in ptr[18]
Allocated 5000000 double s in ptr[19]
Allocated 5000000 double s in ptr[20]
Allocated 5000000 double s in ptr[21]
Allocated 5000000 double s in ptr[22]
Allocated 5000000 double s in ptr[23]
Allocated 5000000 double s in ptr[24]
Allocated 5000000 double s in ptr[25]
Allocated 5000000 double s in ptr[26]
Allocated 5000000 double s in ptr[27]
Exception occurred:bad allocation<\/SPAN>
<\/P>
\n


     \u4e00\u4e9b\u57fa\u672c\u6982\u5ff5
<\/STRONG>\u5f02\u5e38\u53ef\u4ee5\u5904\u7406\u7684\u60c5\u51b5\uff1a<\/SPAN>
1\u3002\u5185\u5b58\u4e0d\u8db3\u4ee5\u6ee1\u8db3new\u8bf7\u6c42
2\u3002\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u3002
3\u3002\u8fd0\u7b97\u6ea2\u51fa
4\u3002\u9664\u6570\u4e3a0
5\u3002\u65e0\u6548\u51fd\u6570\u53c2\u6570

\u4e0d\u53ef\u4ee5\u5904\u7406\u60c5\u51b5\uff1a<\/SPAN>
1\u3002\u78c1\u76d8I\/O\u5b8c\u6210
2\u3002\u7f51\u7edc\u6d88\u606f\u9001\u8fbe
3\u3002\u9f20\u6807\u5355\u51fb
4\u3002\u7b49\u7b49\u3002\u3002\u3002

C++\u5f02\u5e38\u5904\u7406\u5173\u952e\u5b57\uff1a try\u3001throw\u3001catch

\u7b80\u5355\u5904\u7406\u4f8b\u5b50\uff1a\u9664\u6570\u4e3a0



<\/P><\/p>\n","protected":false},"excerpt":{"rendered":"

      \u8fd9\u4e00\u7ae0\u6240\u4ecb\u7ecd\u7684\u4f3c\u4e4e\u7b80\u7565\u4e86\u4e00\u4e9b … \u7ee7\u7eed\u9605\u8bfb →<\/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":[10,8,1],"tags":[14],"class_list":["post-215","post","type-post","status-publish","format-standard","hentry","category-c","category-8","category-uncategorized","tag-c"],"_links":{"self":[{"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/posts\/215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/comments?post=215"}],"version-history":[{"count":1,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/posts\/215\/revisions"}],"predecessor-version":[{"id":342,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/posts\/215\/revisions\/342"}],"wp:attachment":[{"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/media?parent=215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/categories?post=215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.fs.cloudns.biz\/index.php\/wp-json\/wp\/v2\/tags?post=215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}