{"id":309,"date":"2006-09-08T17:36:08","date_gmt":"2006-09-08T09:36:08","guid":{"rendered":"https:\/\/t.n-years.com\/?p=309"},"modified":"2021-01-06T19:40:57","modified_gmt":"2021-01-06T11:40:57","slug":"%e8%81%8c%e4%b8%9ac%e9%9d%9e%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%9a%84%e7%89%b9%e5%be%811c%e9%9d%9e%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%9a%84%e7%89%b9%e5%be%81","status":"publish","type":"post","link":"https:\/\/t.n-years.com\/?p=309","title":{"rendered":"[\u804c\u4e1a]C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81#1 C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81"},"content":{"rendered":"

<P>C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81#1 C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81<\/P>
<P>C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81<BR>1.\u6ce8\u91ca\u884c<BR>\u5728C\u8bed\u8a00\u4e2d\uff0c\u6211\u4eec\u7528\u201c\/*\u2026\u2026*\/\u201d\u8fdb\u884c\u6ce8\u91ca\uff0c\u5982\/*This is a test*\/<BR>\u5728C++\u4e2d\uff0c\u4fdd\u7559\u4e86\u8fd9\u79cd\u6ce8\u91ca\u65b9\u5f0f\uff0c\u4f46\u662fC++\u4e2d\u65b0\u52a0\u5165\u4e86\u4e00\u79cd\u66f4\u6709\u6548\u7684\u6ce8\u91ca\u65b9\u5f0f\uff0c\u8be5\u6ce8\u91ca\u4ee5\u201c\/\/\u201d\u5f00\u5934\uff0c\u76f4\u5230\u884c\u5c3e\u3002\u201c\/\/\u201d\u7528\u5728\u5355\u884c\u6ce8\u91ca\u7279\u522b\u5408\u9002\u3002\u5982\uff1a<BR>x=y+z; \/\/ This is a comment<BR>2.\u65b0\u7684I\/O\u6d41<BR>\u5728C\u4e2d\u5982\u679c\u7528\u4e0b\u9762\u7684\u8f93\u5165\u65b9\u5f0f\u5c31\u4f1a\u51fa\u9519\uff0cC\u7f16\u8bd1\u5668\u68c0\u67e5\u4e0d\u51fa\u8fd9\u79cd\u9519\u8bef\u3002\u5982scanf(\u201c%f\u201d,i)\u3002<BR>C++\u91c7\u7528\u4e86\u66f4\u65b9\u4fbf\u66f4\u5b89\u5168\u7684I\/O\u65b9\u5f0f\uff0c\u5373\u7528\u201dcin&gt;&gt;\u201d\u8fdb\u884c\u8f93\u5165\uff0c\u7528\u201dcout&lt;&lt;\u201d\u8fdb\u884c\u8f93\u51fa\u3002<BR>\u4f8b\u5982\uff1a<BR>int I;<BR>cin&gt;&gt;i;<BR>cout&lt;&lt;I;<BR>\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u8fde\u7eed\u8fdb\u884c\u8f93\u5165\u8f93\u51fa\uff0c\u4f8b\u5982\uff1a<BR>cin&gt;&gt;I&gt;&gt;j&gt;&gt;k;<BR>cout&lt;&lt;I&lt;&lt;j&lt;&lt;k;<BR>\u8fd8\u53ef\u4ee5\u8f93\u51fa\u8868\u8fbe\u5f0f\u5982\uff1a<BR>cout&lt;&lt;a+b+c;<BR>3.\u7075\u6d3b\u7684\u53d8\u91cf\u8bf4\u660e<BR>C++\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u7684\u4efb\u4f55\u5730\u65b9\u8bf4\u660e\u5c40\u90e8\u53d8\u91cf\uff0c\u5b83\u6240\u8bf4\u660e\u7684\u53d8\u91cf\u4ece\u5176\u8bf4\u660e\u70b9\u5230\u8be5\u53d8\u91cf\u6240\u5728\u7684\u6700\u5c0f\u5206\u7a0b\u5e8f\u672b\u7684\u8303\u56f4\u5185\u6709\u6548\u3002<BR>4 Const \u4fee\u9970\u7b26<BR>\u5728C\u4e2d\u7528#define\u6765\u5b9a\u4e49\u5e38\u91cf\uff0c\u5982\uff1a#define LIMIT 100;<BR>C++\u7528\u4e00\u79cd\u66f4\u7075\u6d3b\u5b89\u5168\u7684\u65b9\u6cd5\u6765\u5b9a\u4e49\u5e38\u91cf\uff0c\u5373\u7528const\u4fee\u9970\u7b26\u6765\u5b9a\u4e49\u5e38\u91cf\uff0c\u5982\uff1a<BR>const int LIMIT=100;<BR>const\u53ef\u4ee5\u4e0e\u6307\u9488\u4e00\u8d77\u4f7f\u7528\uff0c\u4ed6\u4eec\u7684\u7ec4\u5408\u53ef\u5f52\u7eb3\u4e3a\u4e09\u79cd\uff1a<BR>(1)\u6307\u5411\u5e38\u91cf\u7684\u6307\u9488<BR>\u6307\u5411\u5e38\u91cf\u7684\u6307\u9488\u662f\u4e00\u4e2a\u6307\u5411\u5e38\u91cf\u7684\u6307\u9488\u53d8\u91cf\u5982\uff1a const char *name=\u201dchen\u201d;<BR>\u542b\u4e49\u4e3a\uff1a\u58f0\u660e\u4e00\u4e2a\u540d\u4e3aname\u7684\u6307\u9488\u53d8\u91cf\uff0c\u4ed6\u6307\u5411\u4e00\u4e2a\u5b57\u7b26\u578b\u5e38\u91cf\uff0c\u521d\u59cb\u5316\u4e3a\u201cchen\u201d\uff0c\u4ece\u540d\u5b57\u53ef\u4ee5\u770b\u51fa\u6307\u9488\u6307\u7684 \u662f\u4e00\u4e2a\u5e38\u91cf\uff0c\u6240\u4ee5\u4e0d\u80fd\u6539\u53d8\u5e38\u91cf\u7684\u503c\uff0c\u5982\uff1aname[3]=\u2019a\u2019; \u662f\u9519\u8bef\u7684\u3002\u4f46\u662f\u53ea\u8981\u6307\u9488\u6307\u5411\u7684\u662f\u5e38\u91cf\u5c31\u884c\uff0c\u5373\uff1a\u53ef\u4ee5\u628a\u6307\u9488\u6307\u5411\u522b\u7684\u5e38\u91cf\uff0c\u5982\uff1aname=\u201dzhang \u201d\u3002<BR>(2)\u5e38\u6307\u9488<BR>\u5e38\u6307\u9488\u662f\u628a\u6307\u9488\u58f0\u660e\u4e3a\u5e38\u91cf\uff0c\u5982\uff1achar *const \/\/\u5408\u6cd5\uff0c<BR>name=\u201dzhang \u201d; \/\/\u975e\u6cd5<BR>(3)\u6307\u5411\u5e38\u91cf\u7684\u5e38\u6307\u9488<BR>\u58f0\u660e\u4e3a\uff1aconst char *const \/\/\u975e\u6cd5<BR>nane=\u201dzhang\u201d \/\/\u975e\u6cd5<\/P>
<P>5. \u5185\u7f6e\u51fd\u6570<BR>\u5728\u51fd\u6570\u8bf4\u660e\u4e4b\u524d\uff0c\u51a0\u4ee5\u5173\u952e\u4e4binline\uff0c\u6539\u51fd\u6570\u5c31\u88ab\u8bf4\u660e\u4e3a\u5185\u7f6e\u51fd\u6570\u3002\u5f53\u7a0b\u5e8f\u4e2d\u51fa\u73b0\u5bf9\u8be5\u51fd\u6570\u7684\u8c03\u7528\u65f6\uff0cC\uff0b\uff0b\u7f16\u8bd1\u5668\u4f7f\u7528\u51fd\u6570\u4f53\u4e2d\u7684\u4ee3\u7801\u66ff\u4ee3\u51fd\u6570\u8c03\u7528\u8868\u8fbe\u5f0f\uff0c\u8fd9\u6837\u80fd\u52a0\u5feb\u4ee3\u7801\u7684\u6267\u884c\uff0c\u51cf\u5c0f\u8c03\u7528\u5f00\u9500\uff1b\u6d88\u9664#vdefine \u7684\u4e0d\u5b89\u5168\u56e0\u7d20\u3002\u5982\uff1a<BR>#include&lt;iostream.h&gt;<BR>inline float circle(floar r)<BR>{return 3.1416*r*r;}<\/P>
<P>int main()<BR>{<BR>for(int I=1;I&lt;=3;I++)<BR>cout&lt;&lt;I&lt;&lt;circle(i)&lt;&lt;endl;<BR>return 0;}<BR>\u8fd0\u884c\u7ed3\u679c\u4e3a\uff1a<BR>1 3.1416<BR>2 12.5664<BR>3 28.4401<BR>6. \u5e26\u7f3a\u7701\u53c2\u6570\u7684\u51fd\u6570<BR>C\uff0b\uff0b\u5728\u8bf4\u660e\u51fd\u6570\u539f\u578b\u65f6\uff0c\u53ef\u4e3a\u4e00\u4e2a\u6216\u591a\u4e2a\u53c2\u6570\u6307\u5b9a\u7f3a\u7701\u53c2\u6570\u503c\uff0c\u8c03\u7528\u65f6\uff0c\u82e5\u7701\u7565\u5176\u4e2d\u67d0\u4e00\u53c2\u6570\uff0c\u4f1a\u81ea\u52a8\u5730\u4ee5\u5374\u50e7\u53c2\u6570\u4f5c\u4e3a\u76f8\u5e94\u5730\u53c2\u6570\u503c\u3002\u5982\uff1a<BR>int special(int x=5,float=3);<BR>\u4ee5\u4e0b\u8c03\u7528\u53c2\u6570\u4e3a\uff1a<BR>special(100,34.4); \/\/x=100,y=34.4<BR>special(25); \/\/x=25,y=3<BR>special(); \/\/x=100,y=3<\/P>
<P>7\uff0enew\u548cdelete<BR>C\u8bed\u8a00\u7528\u51fd\u6570malloc()\u548cfree()\u52a8\u6001\u5730\u5206\u914d\u5185\u5b58\u548c\u91ca\u653e\u5185\u5b58\u3002C\uff0b\uff0b\u7528new\u548cdelete\u66f4\u597d\u5730\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\u3002<BR>\u4f7f\u7528\u65b9\u6cd5\u4e3a\uff1ap\uff1dnew type\uff1b delete p\uff1b<BR>\u5176\u4e2dtype\u662f\u4e00\u6570\u636e\u7c7b\u578b\u540d\uff0c\u5982int\uff1bnew \u5206\u914d\u4e00\u5757\u5927\u5c0f\u4e3asizeof\uff08type\uff09\u5b57\u8282\u5730\u5185\u5b58\uff0c\u9996\u5730\u5740\u5b58\u4e8e\u6307\u9488p\u4e2d\u3002delete\u91ca\u653e\u5185\u5b58\u3002<BR>New\u548cdelete\u7684\u4f18\u70b9\uff1a<BR>(1) new\u53ef\u4ee5\u81ea\u52a8\u8ba1\u7b97\u6240\u8981\u5206\u914d\u5730\u5185\u5b58\u5927\u5c0f\u3002<BR>(2) new\u80fd\u81ea\u52a8\u8fd4\u56de\u6b63\u786e\u5730\u6307\u9488\u7c7b\u578b\uff0c\u4e0d\u5fc5\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3002<BR>(3) \u53ef\u4ee5\u7528new\u5c06\u5206\u914d\u5730\u5bf9\u8c61\u521d\u59cb\u5316\u3002<BR>(4) new\u548cdelete\u53ef\u4ee5\u88ab\u91cd\u8f7d\u3002<\/P>
<P>8\uff0e\u5f15\u7528\u7684\u4f7f\u7528 <BR>\u5728C\u4e2d\u7528\u6307\u9488\u4f20\u9012\u53c2\u6570\u5730\u5740\uff0c\u4f46\u662f\uff0c\u6307\u9488\u7684\u4f7f\u7528\u975e\u5e38\u590d\u6742\uff0c\u5bb9\u6613\u51fa\u9519\u3002C\uff0b\uff0b\u91c7\u7528\u4e86\u5f15\u7528\u7684\u6982\u5ff5\uff0c\u5b83\u662f\u4e00\u79cd\u95f4\u63a5\u7684\u6307\u9488\u3002\u5f15\u7528\u53ef\u4e3a\u53d8\u91cf\u8d77\u522b\u540d\uff0c\u4e3b\u8981\u7528\u4e8e\u53c2\u6570\u4f20\u9012\u548c\u505a\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u3002<BR>1\uff0e\u5f15\u7528\u7684\u5b9a\u4e49<BR>\u5f15\u7528\u5b9a\u4e49\u7684\u5173\u952e\u5b57\u662f\u201ctype &amp;\u201d,\u542b\u4e49\u662f\u5b9a\u4e49\u4e00\u4e2atype\u7c7b\u7684\u5f15\u7528\uff0c\u6b64\u5f15\u7528\u53ef\u4e0etype\u7c7b\u5bf9\u8c61\u6216\u53d8\u91cf\u7684\u5730\u5740\u76f8\u8054\u7cfb\u3002\u5982\uff1a<BR>int I=5;<BR>int &amp;j=I;<BR>\u542b\u4e49\u662f\uff1a\u521b\u5efa\u4e00\u4e2a\u6574\u578b\u5f15\u7528\uff0cj\u662fI\u7684\u522b\u540d\uff0c\u5b83\u4eec\u516c\u7528\u4e00\u4e2a\u5185\u5b58\u5730\u5740\u3002<BR>\u8bf4\u660e:<BR>(1) double &amp; rr=1; \u7b49\u4ef7\u4e0e double temp\uff1b temp\uff1ddouble\uff081\uff09\uff1b double &amp; rr\uff1dtemp\uff1b<BR>(2) int *a; int * &amp; p=a; int b=8; p=&amp;b; \/\/\u6b63\u786e\uff0c\u6307\u9488\u53d8\u91cf\u7684\u5f15\u7528<BR>void &amp; a=3; \/\/\u4e0d\u6b63\u786e\uff0c\u6ca1\u6709\u53d8\u91cf\u6216\u5bf9\u8c61\u7684\u7c7b\u578b\u662fvoid<BR>int &amp; ri=NULL\uff1b \/\/\u4e0d\u6b63\u786e\uff0c\u6709\u7a7a\u6307\u9488\uff0c\u65e0\u7a7a\u5f15\u7528<BR>(3) int &amp; ra=int; \/\/\u4e0d\u6b63\u786e\uff0c\u4e0d\u80fd\u7528\u7c7b\u578b\u6765\u521d\u59cb\u5316<BR>int *p=new int; int &amp; r=*p; \/\/\u6b63\u786e<BR>(4) \u5f15\u7528\u4e0d\u540c\u4e8e\u4e00\u822c\u53d8\u91cf\uff0c\u4e0b\u9762\u7c7b\u578b\u58f0\u660e\u662f\u975e\u6cd5\u7684\uff1a<BR>int &amp;b[3]; \/\/\u4e0d\u80fd\u5efa\u7acb\u5f15\u7528\u6570\u7ec4<BR>int &amp; *p; \/\/\u4e0d\u80fd\u5efa\u7acb\u6307\u5411\u5f15\u7528\u7684\u6307\u9488<BR>int &amp;&amp;r; \/\/\u4e0d\u80fd\u5efa\u7acb\u5f15\u7528\u7684\u5f15\u7528<BR>(5) \u5f53\u4f7f\u7528&amp;\u8fd0\u7b97\u7b26\u53d6\u4e00\u4e2a\u5f15\u7528\u7684\u5730\u5740\u65f6\uff0c\u5176\u503c\u4e3a\u6240\u5f15\u7528\u53d8\u91cf\u7684\u5730\u5740\uff0c <BR>2\uff0e\u5f15\u7528\u53c2\u6570<BR>\u5f15\u7528\u7684\u4e00\u4e2a\u91cd\u8981\u5e94\u7528\u5c31\u662f\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u3002\u5728\u4f7f\u7528\u5f15\u7528\u505a\u53c2\u6570\u65f6\u4e0d\u5fc5\u4f7f\u7528*\uff0c\u5e76\u4e14\u53c8\u6ca1\u6709\u5730\u5740\u4e0e\u53d8\u91cf\u672c\u8eab\u7684\u5dee\u522b\uff0c\u4ece\u800c\u7b80\u5316\u4e86\u7a0b\u5e8f\uff0c<BR>3. \u5f15\u7528\u548c\u6307\u9488\u4f7f\u7528\u539f\u5219<BR>1.\u5728\u53ef\u4ee5\u7528\u5f15\u7528\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0d\u8981\u7528\u6307\u9488\uff1b<BR>2.\u5f15\u7528\u4e0d\u5141\u8bb8\u91cd\u65b0\u8d4b\u503c.\uff0c\u5f53\u4f7f\u7528\u4e00\u4e2a\u53d8\u91cf\u6307\u5411\u4e0d\u540c\u7684\u5bf9\u8c61\u65f6,\u5fc5\u987b\u7528\u6307\u9488\uff1b<BR>3.\u5f15\u7528\u4e0d\u5141\u8bb8\u4e3a\u7a7a\uff0c\u5f53\u5b58\u5728\u5bf9\u8c61\u4e3a\u7a7a\u65f6,\u5fc5\u987b\u4f7f\u7528\u6307\u9488\u3002 <BR><\/P> <\/p>\n","protected":false},"excerpt":{"rendered":"

<P>C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81#1 C++\u975e\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81<\/P><P>C+… <\/p>\n

\u9605\u8bfb\u66f4\u591a<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-309","post","type-post","status-publish","format-standard","hentry","category-24"],"_links":{"self":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/309","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=309"}],"version-history":[{"count":1,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions"}],"predecessor-version":[{"id":2550,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions\/2550"}],"wp:attachment":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}