{"id":171,"date":"2009-07-12T14:38:00","date_gmt":"2009-07-12T06:38:00","guid":{"rendered":"http:\/\/gsakd878.wordpress.com\/2009\/07\/12\/%e9%ab%98%e8%b4%a8%e9%87%8fc%e6%95%99%e7%a8%8b-%e7%ac%ac6%e7%ab%a0-%e5%87%bd%e6%95%b0%e8%ae%be%e8%ae%a1"},"modified":"2009-07-12T14:38:00","modified_gmt":"2009-07-12T06:38:00","slug":"%e9%ab%98%e8%b4%a8%e9%87%8fc%e6%95%99%e7%a8%8b-%e7%ac%ac6%e7%ab%a0-%e5%87%bd%e6%95%b0%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/www.keyboardmeow.com\/?p=171","title":{"rendered":"\u9ad8\u8d28\u91cfC++\u6559\u7a0b — \u7b2c6\u7ae0 \u51fd\u6570\u8bbe\u8ba1"},"content":{"rendered":"
\u9ad8\u8d28\u91cfC++\u6559\u7a0b -- \u7b2c6\u7ae0 \u51fd\u6570\u8bbe\u8ba1<\/span><\/div>\n
\n\u6765\u6e90:www.vcworld.net<\/font><\/a>\u3000<\/div>\n
\n

\u51fd\u6570\u662fC++\/C\u7a0b\u5e8f\u7684\u57fa\u672c\u529f\u80fd\u5355\u5143\uff0c\u5176\u91cd\u8981\u6027\u4e0d\u8a00\u800c\u55bb\u3002\u51fd\u6570\u8bbe\u8ba1\u7684\u7ec6\u5fae\u7f3a\u70b9\u5f88\u5bb9\u6613\u5bfc\u81f4\u8be5\u51fd\u6570\u88ab\u9519\u7528\uff0c\u6240\u4ee5\u5149\u4f7f\u51fd\u6570\u7684\u529f\u80fd\u6b63\u786e\u662f\u4e0d\u591f\u7684\u3002\u672c\u7ae0\u91cd\u70b9\u8bba\u8ff0\u51fd\u6570\u7684\u63a5\u53e3\u8bbe\u8ba1\u548c\u5185\u90e8\u5b9e\u73b0\u7684\u4e00\u4e9b\u89c4\u5219\u3002<\/span><\/p>\n

\u51fd\u6570\u63a5\u53e3\u7684\u4e24\u4e2a\u8981\u7d20\u662f\u53c2\u6570\u548c\u8fd4\u56de\u503c\u3002C\u8bed\u8a00\u4e2d\uff0c\u51fd\u6570\u7684\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7684\u4f20\u9012\u65b9\u5f0f\u6709\u4e24\u79cd\uff1a\u503c\u4f20\u9012\uff08pass by
\nvalue\uff09\u548c\u6307\u9488\u4f20\u9012\uff08pass by pointer\uff09\u3002C++ \u8bed\u8a00\u4e2d\u591a\u4e86\u5f15\u7528\u4f20\u9012\uff08pass by
\nreference\uff09\u3002\u7531\u4e8e\u5f15\u7528\u4f20\u9012\u7684\u6027\u8d28\u8c61\u6307\u9488\u4f20\u9012\uff0c\u800c\u4f7f\u7528\u65b9\u5f0f\u5374\u8c61\u503c\u4f20\u9012\uff0c\u521d\u5b66\u8005\u5e38\u5e38\u8ff7\u60d1\u4e0d\u89e3\uff0c\u5bb9\u6613\u5f15\u8d77\u6df7\u4e71\uff0c\u8bf7\u5148\u9605\u8bfb6.6\u8282\u201c\u5f15\u7528\u4e0e\u6307\u9488\u7684\u6bd4\u8f83\u201d\u3002<\/p>\n

\u00a0<\/p>\n

6.1 \u53c2\u6570\u7684\u89c4\u5219<\/font><\/strong><\/p>\n

\u25cf\u3010\u89c4\u52196-1-1\u3011\u53c2\u6570\u7684\u4e66\u5199\u8981\u5b8c\u6574\uff0c\u4e0d\u8981\u8d2a\u56fe\u7701\u4e8b\u53ea\u5199\u53c2\u6570\u7684\u7c7b\u578b\u800c\u7701\u7565\u53c2\u6570\u540d\u5b57\u3002\u5982\u679c\u51fd\u6570\u6ca1\u6709\u53c2\u6570\uff0c\u5219\u7528void\u586b\u5145\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

void SetValue(int width, int height); \/\/ \u826f\u597d\u7684\u98ce\u683c<\/p>\n

void SetValue(int, int); \/\/ \u4e0d\u826f\u7684\u98ce\u683c<\/p>\n

float GetValue(void); \/\/ \u826f\u597d\u7684\u98ce\u683c<\/p>\n

float GetValue(); \/\/ \u4e0d\u826f\u7684\u98ce\u683c<\/p>\n

\u25cf\u3010\u89c4\u52196-1-2\u3011\u53c2\u6570\u547d\u540d\u8981\u6070\u5f53\uff0c\u987a\u5e8f\u8981\u5408\u7406\u3002<\/p>\n

\u4f8b\u5982\u7f16\u5199\u5b57\u7b26\u4e32\u62f7\u8d1d\u51fd\u6570StringCopy\uff0c\u5b83\u6709\u4e24\u4e2a\u53c2\u6570\u3002\u5982\u679c\u628a\u53c2\u6570\u540d\u5b57\u8d77\u4e3astr1\u548cstr2\uff0c\u4f8b\u5982<\/p>\n

void StringCopy(char *str1, char *str2);<\/p>\n

\u90a3\u4e48\u6211\u4eec\u5f88\u96be\u641e\u6e05\u695a\u7a76\u7adf\u662f\u628astr1\u62f7\u8d1d\u5230str2\u4e2d\uff0c\u8fd8\u662f\u521a\u597d\u5012\u8fc7\u6765\u3002<\/p>\n

\n\u53ef\u4ee5\u628a\u53c2\u6570\u540d\u5b57\u8d77\u5f97\u66f4\u6709\u610f\u4e49\uff0c\u5982\u53ebstrSource\u548cstrDestination\u3002\u8fd9\u6837\u4ece\u540d\u5b57\u4e0a\u5c31\u53ef\u4ee5\u770b\u51fa\u5e94\u8be5\u628astrSource\u62f7\u8d1d\u5230strDestination\u3002<\/p>\n

\n\u8fd8\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u8fd9\u4e24\u4e2a\u53c2\u6570\u90a3\u4e00\u4e2a\u8be5\u5728\u524d\u90a3\u4e00\u4e2a\u8be5\u5728\u540e\uff1f\u53c2\u6570\u7684\u987a\u5e8f\u8981\u9075\u5faa\u7a0b\u5e8f\u5458\u7684\u4e60\u60ef\u3002\u4e00\u822c\u5730\uff0c\u5e94\u5c06\u76ee\u7684\u53c2\u6570\u653e\u5728\u524d\u9762\uff0c\u6e90\u53c2\u6570\u653e\u5728\u540e\u9762\u3002<\/p>\n

\u5982\u679c\u5c06\u51fd\u6570\u58f0\u660e\u4e3a\uff1a<\/p>\n

void StringCopy(char *strSource, char *strDestination);<\/p>\n

\u522b\u4eba\u5728\u4f7f\u7528\u65f6\u53ef\u80fd\u4f1a\u4e0d\u5047\u601d\u7d22\u5730\u5199\u6210\u5982\u4e0b\u5f62\u5f0f\uff1a<\/p>\n

char str[20];<\/p>\n

StringCopy(str, \u201cHello World\u201d); \/\/ \u53c2\u6570\u987a\u5e8f\u98a0\u5012<\/p>\n

\u25cf\u3010\u89c4\u52196-1-3\u3011\u5982\u679c\u53c2\u6570\u662f\u6307\u9488\uff0c\u4e14\u4ec5\u4f5c\u8f93\u5165\u7528\uff0c\u5219\u5e94\u5728\u7c7b\u578b\u524d\u52a0const\uff0c\u4ee5\u9632\u6b62\u8be5\u6307\u9488\u5728\u51fd\u6570\u4f53\u5185\u88ab\u610f\u5916\u4fee\u6539\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

void StringCopy(char *strDestination\uff0cconst char *strSource);<\/p>\n

\u25cf\u3010\u89c4\u52196-1-4\u3011\u5982\u679c\u8f93\u5165\u53c2\u6570\u4ee5\u503c\u4f20\u9012\u7684\u65b9\u5f0f\u4f20\u9012\u5bf9\u8c61\uff0c\u5219\u5b9c\u6539\u7528\u201cconst
\n&\u201d\u65b9\u5f0f\u6765\u4f20\u9012\uff0c\u8fd9\u6837\u53ef\u4ee5\u7701\u53bb\u4e34\u65f6\u5bf9\u8c61\u7684\u6784\u9020\u548c\u6790\u6784\u8fc7\u7a0b\uff0c\u4ece\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n

\u25cf\u3010\u5efa\u8bae6-1-1\u3011\u907f\u514d\u51fd\u6570\u6709\u592a\u591a\u7684\u53c2\u6570\uff0c\u53c2\u6570\u4e2a\u6570\u5c3d\u91cf\u63a7\u5236\u57285\u4e2a\u4ee5\u5185\u3002\u5982\u679c\u53c2\u6570\u592a\u591a\uff0c\u5728\u4f7f\u7528\u65f6\u5bb9\u6613\u5c06\u53c2\u6570\u7c7b\u578b\u6216\u987a\u5e8f\u641e\u9519\u3002<\/p>\n

\u25cf\u3010\u5efa\u8bae6-1-2\u3011\u5c3d\u91cf\u4e0d\u8981\u4f7f\u7528\u7c7b\u578b\u548c\u6570\u76ee\u4e0d\u786e\u5b9a\u7684\u53c2\u6570\u3002<\/p>\n

C\u6807\u51c6\u5e93\u51fd\u6570printf\u662f\u91c7\u7528\u4e0d\u786e\u5b9a\u53c2\u6570\u7684\u5178\u578b\u4ee3\u8868\uff0c\u5176\u539f\u578b\u4e3a\uff1a<\/p>\n

int printf(const chat *format[, argument]\u2026);<\/p>\n

\u8fd9\u79cd\u98ce\u683c\u7684\u51fd\u6570\u5728\u7f16\u8bd1\u65f6\u4e27\u5931\u4e86\u4e25\u683c\u7684\u7c7b\u578b\u5b89\u5168\u68c0\u67e5\u3002<\/p>\n

\u00a0<\/p>\n

6.2 \u8fd4\u56de\u503c\u7684\u89c4\u5219<\/font><\/strong><\/p>\n

\u25cf\u3010\u89c4\u52196-2-1\u3011\u4e0d\u8981\u7701\u7565\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u3002<\/p>\n

C\u8bed\u8a00\u4e2d\uff0c\u51e1\u4e0d\u52a0\u7c7b\u578b\u8bf4\u660e\u7684\u51fd\u6570\uff0c\u4e00\u5f8b\u81ea\u52a8\u6309\u6574\u578b\u5904\u7406\u3002\u8fd9\u6837\u505a\u4e0d\u4f1a\u6709\u4ec0\u4e48\u597d\u5904\uff0c\u5374\u5bb9\u6613\u88ab\u8bef\u89e3\u4e3avoid\u7c7b\u578b\u3002<\/p>\n

C++\u8bed\u8a00\u6709\u5f88\u4e25\u683c\u7684\u7c7b\u578b\u5b89\u5168\u68c0\u67e5\uff0c\u4e0d\u5141\u8bb8\u4e0a\u8ff0\u60c5\u51b5\u53d1\u751f\u3002\u7531\u4e8eC++\u7a0b\u5e8f\u53ef\u4ee5\u8c03\u7528C\u51fd\u6570\uff0c\u4e3a\u4e86\u907f\u514d\u6df7\u4e71\uff0c\u89c4\u5b9a\u4efb\u4f55C++\/
\nC\u51fd\u6570\u90fd\u5fc5\u987b\u6709\u7c7b\u578b\u3002\u5982\u679c\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u90a3\u4e48\u5e94\u58f0\u660e\u4e3avoid\u7c7b\u578b\u3002<\/p>\n

\u25cf\u3010\u89c4\u52196-2-2\u3011\u51fd\u6570\u540d\u5b57\u4e0e\u8fd4\u56de\u503c\u7c7b\u578b\u5728\u8bed\u4e49\u4e0a\u4e0d\u53ef\u51b2\u7a81\u3002<\/p>\n

\u8fdd\u53cd\u8fd9\u6761\u89c4\u5219\u7684\u5178\u578b\u4ee3\u8868\u662fC\u6807\u51c6\u5e93\u51fd\u6570getchar\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

char c;<\/p>\n

c = getchar();<\/p>\n

if (c == EOF)<\/p>\n

\u2026<\/p>\n

\n\u6309\u7167getchar\u540d\u5b57\u7684\u610f\u601d\uff0c\u5c06\u53d8\u91cfc\u58f0\u660e\u4e3achar\u7c7b\u578b\u662f\u5f88\u81ea\u7136\u7684\u4e8b\u60c5\u3002\u4f46\u4e0d\u5e78\u7684\u662fgetchar\u7684\u786e\u4e0d\u662fchar\u7c7b\u578b\uff0c\u800c\u662fint\u7c7b\u578b\uff0c\u5176\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n

int getchar(void);<\/p>\n

\n\u7531\u4e8ec\u662fchar\u7c7b\u578b\uff0c\u53d6\u503c\u8303\u56f4\u662f[-128\uff0c127]\uff0c\u5982\u679c\u5b8fEOF\u7684\u503c\u5728char\u7684\u53d6\u503c\u8303\u56f4\u4e4b\u5916\uff0c\u90a3\u4e48if\u8bed\u53e5\u5c06\u603b\u662f\u5931\u8d25\uff0c\u8fd9\u79cd\u201c\u5371\u9669\u201d\u4eba\u4eec\u4e00\u822c\u54ea\u91cc\u6599\u5f97\u5230\uff01\u5bfc\u81f4\u672c\u4f8b\u9519\u8bef\u7684\u8d23\u4efb\u5e76\u4e0d\u5728\u7528\u6237\uff0c\u662f\u51fd\u6570getchar\u8bef\u5bfc\u4e86\u4f7f\u7528\u8005\u3002<\/p>\n

\u25cf\u3010\u89c4\u52196-2-3\u3011\u4e0d\u8981\u5c06\u6b63\u5e38\u503c\u548c\u9519\u8bef\u6807\u5fd7\u6df7\u5728\u4e00\u8d77\u8fd4\u56de\u3002\u6b63\u5e38\u503c\u7528\u8f93\u51fa\u53c2\u6570\u83b7\u5f97\uff0c\u800c\u9519\u8bef\u6807\u5fd7\u7528return\u8bed\u53e5\u8fd4\u56de\u3002<\/p>\n

\u56de\u987e\u4e0a\u4f8b\uff0cC\u6807\u51c6\u5e93\u51fd\u6570\u7684\u8bbe\u8ba1\u8005\u4e3a\u4ec0\u4e48\u8981\u5c06getchar\u58f0\u660e\u4e3a\u4ee4\u4eba\u8ff7\u7cca\u7684int\u7c7b\u578b\u5462\uff1f\u4ed6\u4f1a\u90a3\u4e48\u50bb\u5417\uff1f<\/p>\n

\n\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0cgetchar\u7684\u786e\u8fd4\u56de\u5355\u4e2a\u5b57\u7b26\u3002\u4f46\u5982\u679cgetchar\u78b0\u5230\u6587\u4ef6\u7ed3\u675f\u6807\u5fd7\u6216\u53d1\u751f\u8bfb\u9519\u8bef\uff0c\u5b83\u5fc5\u987b\u8fd4\u56de\u4e00\u4e2a\u6807\u5fd7EOF\u3002\u4e3a\u4e86\u533a\u522b\u4e8e\u6b63\u5e38\u7684\u5b57\u7b26\uff0c\u53ea\u597d\u5c06EOF\u5b9a\u4e49\u4e3a\u8d1f\u6570\uff08\u901a\u5e38\u4e3a\u8d1f1\uff09\u3002\u56e0\u6b64\u51fd\u6570getchar\u5c31\u6210\u4e86int\u7c7b\u578b\u3002<\/p>\n

\n\u6211\u4eec\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u78b0\u5230\u4e0a\u8ff0\u4ee4\u4eba\u4e3a\u96be\u7684\u95ee\u9898\u3002\u4e3a\u4e86\u907f\u514d\u51fa\u73b0\u8bef\u89e3\uff0c\u6211\u4eec\u5e94\u8be5\u5c06\u6b63\u5e38\u503c\u548c\u9519\u8bef\u6807\u5fd7\u5206\u5f00\u3002\u5373\uff1a\u6b63\u5e38\u503c\u7528\u8f93\u51fa\u53c2\u6570\u83b7\u5f97\uff0c\u800c\u9519\u8bef\u6807\u5fd7\u7528return\u8bed\u53e5\u8fd4\u56de\u3002<\/p>\n

\u51fd\u6570getchar\u53ef\u4ee5\u6539\u5199\u6210 BOOL GetChar(char *c);<\/p>\n

\u867d\u7136gechar\u6bd4GetChar\u7075\u6d3b\uff0c\u4f8b\u5982 putchar(getchar());
\n\u4f46\u662f\u5982\u679cgetchar\u7528\u9519\u4e86\uff0c\u5b83\u7684\u7075\u6d3b\u6027\u53c8\u6709\u4ec0\u4e48\u7528\u5462\uff1f<\/p>\n

\u25cf\u3010\u5efa\u8bae6-2-1\u3011\u6709\u65f6\u5019\u51fd\u6570\u539f\u672c\u4e0d\u9700\u8981\u8fd4\u56de\u503c\uff0c\u4f46\u4e3a\u4e86\u589e\u52a0\u7075\u6d3b\u6027\u5982\u652f\u6301\u94fe\u5f0f\u8868\u8fbe\uff0c\u53ef\u4ee5\u9644\u52a0\u8fd4\u56de\u503c\u3002<\/p>\n

\u4f8b\u5982\u5b57\u7b26\u4e32\u62f7\u8d1d\u51fd\u6570strcpy\u7684\u539f\u578b\uff1a<\/p>\n

char *strcpy(char *strDest\uff0cconst char *strSrc);<\/p>\n

\nstrcpy\u51fd\u6570\u5c06strSrc\u62f7\u8d1d\u81f3\u8f93\u51fa\u53c2\u6570strDest\u4e2d\uff0c\u540c\u65f6\u51fd\u6570\u7684\u8fd4\u56de\u503c\u53c8\u662fstrDest\u3002\u8fd9\u6837\u505a\u5e76\u975e\u591a\u6b64\u4e00\u4e3e\uff0c\u53ef\u4ee5\u83b7\u5f97\u5982\u4e0b\u7075\u6d3b\u6027\uff1a<\/p>\n

char str[20];<\/p>\n

int length = strlen( strcpy(str, \u201cHello World\u201d) );<\/p>\n

\n\u25cf\u3010\u5efa\u8bae6-2-2\u3011\u5982\u679c\u51fd\u6570\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6709\u4e9b\u573a\u5408\u7528\u201c\u5f15\u7528\u4f20\u9012\u201d\u66ff\u6362\u201c\u503c\u4f20\u9012\u201d\u53ef\u4ee5\u63d0\u9ad8\u6548\u7387\u3002\u800c\u6709\u4e9b\u573a\u5408\u53ea\u80fd\u7528\u201c\u503c\u4f20\u9012\u201d\u800c\u4e0d\u80fd\u7528\u201c\u5f15\u7528\u4f20\u9012\u201d\uff0c\u5426\u5219\u4f1a\u51fa\u9519\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

class String<\/p>\n

{\u2026<\/p>\n

\/\/ \u8d4b\u503c\u51fd\u6570<\/p>\n

String & operate=(const String
\n&other);<\/p>\n

\/\/ \u76f8\u52a0\u51fd\u6570\uff0c\u5982\u679c\u6ca1\u6709friend\u4fee\u9970\u5219\u53ea\u8bb8\u6709\u4e00\u4e2a\u53f3\u4fa7\u53c2\u6570<\/p>\n

friend String operate+( const String &s1, const
\nString &s2);<\/p>\n

private:<\/p>\n

char *m_data;<\/p>\n

}<\/p>\n

String\u7684\u8d4b\u503c\u51fd\u6570operate = \u7684\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n

String & String::operate=(const String
\n&other)<\/p>\n

{<\/p>\n

if (this == &other)<\/p>\n

return *this;<\/p>\n

delete m_data;<\/p>\n

m_data = new char[strlen(other.data)+1];<\/p>\n

strcpy(m_data, other.data);<\/p>\n

return *this; \/\/ \u8fd4\u56de\u7684\u662f *this\u7684\u5f15\u7528\uff0c\u65e0\u9700\u62f7\u8d1d\u8fc7\u7a0b<\/p>\n

}<\/p>\n

\u5bf9\u4e8e\u8d4b\u503c\u51fd\u6570\uff0c\u5e94\u5f53\u7528\u201c\u5f15\u7528\u4f20\u9012\u201d\u7684\u65b9\u5f0f\u8fd4\u56deString\u5bf9\u8c61\u3002\u5982\u679c\u7528\u201c\u503c\u4f20\u9012\u201d\u7684\u65b9\u5f0f\uff0c\u867d\u7136\u529f\u80fd\u4ecd\u7136\u6b63\u786e\uff0c\u4f46\u7531\u4e8ereturn\u8bed\u53e5\u8981\u628a
\n*this\u62f7\u8d1d\u5230\u4fdd\u5b58\u8fd4\u56de\u503c\u7684\u5916\u90e8\u5b58\u50a8\u5355\u5143\u4e4b\u4e2d\uff0c\u589e\u52a0\u4e86\u4e0d\u5fc5\u8981\u7684\u5f00\u9500\uff0c\u964d\u4f4e\u4e86\u8d4b\u503c\u51fd\u6570\u7684\u6548\u7387\u3002\u4f8b\u5982\uff1a<\/p>\n

String a,b,c;<\/p>\n

\u2026<\/p>\n

a = b; \/\/ \u5982\u679c\u7528\u201c\u503c\u4f20\u9012\u201d\uff0c\u5c06\u4ea7\u751f\u4e00\u6b21 *this \u62f7\u8d1d<\/p>\n

a = b = c; \/\/ \u5982\u679c\u7528\u201c\u503c\u4f20\u9012\u201d\uff0c\u5c06\u4ea7\u751f\u4e24\u6b21 *this \u62f7\u8d1d<\/p>\n

String\u7684\u76f8\u52a0\u51fd\u6570operate + \u7684\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n

String operate+(const String &s1, const String
\n&s2)<\/p>\n

{<\/p>\n

String temp;<\/p>\n

delete temp.data; \/\/ temp.data\u662f\u4ec5\u542b\u2018\u2019\u7684\u5b57\u7b26\u4e32<\/p>\n

temp.data = new char[strlen(s1.data) + strlen(s2.data) +1];<\/p>\n

strcpy(temp.data, s1.data);<\/p>\n

strcat(temp.data, s2.data);<\/p>\n

return temp;<\/p>\n

}<\/p>\n

\n\u5bf9\u4e8e\u76f8\u52a0\u51fd\u6570\uff0c\u5e94\u5f53\u7528\u201c\u503c\u4f20\u9012\u201d\u7684\u65b9\u5f0f\u8fd4\u56deString\u5bf9\u8c61\u3002\u5982\u679c\u6539\u7528\u201c\u5f15\u7528\u4f20\u9012\u201d\uff0c\u90a3\u4e48\u51fd\u6570\u8fd4\u56de\u503c\u662f\u4e00\u4e2a\u6307\u5411\u5c40\u90e8\u5bf9\u8c61temp\u7684\u201c\u5f15\u7528\u201d\u3002\u7531\u4e8etemp\u5728\u51fd\u6570\u7ed3\u675f\u65f6\u88ab\u81ea\u52a8\u9500\u6bc1\uff0c\u5c06\u5bfc\u81f4\u8fd4\u56de\u7684\u201c\u5f15\u7528\u201d\u65e0\u6548\u3002\u4f8b\u5982\uff1a<\/p>\n

c = a + b;<\/p>\n

\u6b64\u65f6 a + b \u5e76\u4e0d\u8fd4\u56de\u671f\u671b\u503c\uff0cc\u4ec0\u4e48\u4e5f\u5f97\u4e0d\u5230\uff0c\u6d41\u4e0b\u4e86\u9690\u60a3\u3002<\/p>\n

\u00a0<\/p>\n

6.3 \u51fd\u6570\u5185\u90e8\u5b9e\u73b0\u7684\u89c4\u5219<\/font><\/strong><\/p>\n

\n\u4e0d\u540c\u529f\u80fd\u7684\u51fd\u6570\u5176\u5185\u90e8\u5b9e\u73b0\u5404\u4e0d\u76f8\u540c\uff0c\u770b\u8d77\u6765\u4f3c\u4e4e\u65e0\u6cd5\u5c31\u201c\u5185\u90e8\u5b9e\u73b0\u201d\u8fbe\u6210\u4e00\u81f4\u7684\u89c2\u70b9\u3002\u4f46\u6839\u636e\u7ecf\u9a8c\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u51fd\u6570\u4f53\u7684\u201c\u5165\u53e3\u5904\u201d\u548c\u201c\u51fa\u53e3\u5904\u201d\u4ece\u4e25\u628a\u5173\uff0c\u4ece\u800c\u63d0\u9ad8\u51fd\u6570\u7684\u8d28\u91cf\u3002<\/p>\n

\u25cf\u3010\u89c4\u52196-3-1\u3011\u5728\u51fd\u6570\u4f53\u7684\u201c\u5165\u53e3\u5904\u201d\uff0c\u5bf9\u53c2\u6570\u7684\u6709\u6548\u6027\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n

\n\u5f88\u591a\u7a0b\u5e8f\u9519\u8bef\u662f\u7531\u975e\u6cd5\u53c2\u6570\u5f15\u8d77\u7684\uff0c\u6211\u4eec\u5e94\u8be5\u5145\u5206\u7406\u89e3\u5e76\u6b63\u786e\u4f7f\u7528\u201c\u65ad\u8a00\u201d\uff08assert\uff09\u6765\u9632\u6b62\u6b64\u7c7b\u9519\u8bef\u3002\u8be6\u89c16.5\u8282\u201c\u4f7f\u7528\u65ad\u8a00\u201d\u3002<\/p>\n

\u25cf\u3010\u89c4\u52196-3-2\u3011\u5728\u51fd\u6570\u4f53\u7684\u201c\u51fa\u53e3\u5904\u201d\uff0c\u5bf9return\u8bed\u53e5\u7684\u6b63\u786e\u6027\u548c\u6548\u7387\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n

\n\u5982\u679c\u51fd\u6570\u6709\u8fd4\u56de\u503c\uff0c\u90a3\u4e48\u51fd\u6570\u7684\u201c\u51fa\u53e3\u5904\u201d\u662freturn\u8bed\u53e5\u3002\u6211\u4eec\u4e0d\u8981\u8f7b\u89c6return\u8bed\u53e5\u3002\u5982\u679creturn\u8bed\u53e5\u5199\u5f97\u4e0d\u597d\uff0c\u51fd\u6570\u8981\u4e48\u51fa\u9519\uff0c\u8981\u4e48\u6548\u7387\u4f4e\u4e0b\u3002<\/p>\n

\u6ce8\u610f\u4e8b\u9879\u5982\u4e0b\uff1a<\/p>\n

\uff081\uff09return\u8bed\u53e5\u4e0d\u53ef\u8fd4\u56de\u6307\u5411\u201c\u6808\u5185\u5b58\u201d\u7684\u201c\u6307\u9488\u201d\u6216\u8005\u201c\u5f15\u7528\u201d\uff0c\u56e0\u4e3a\u8be5\u5185\u5b58\u5728\u51fd\u6570\u4f53\u7ed3\u675f\u65f6\u88ab\u81ea\u52a8\u9500\u6bc1\u3002\u4f8b\u5982<\/p>\n

char * Func(void)<\/p>\n

{<\/p>\n

char str[] = \u201chello world\u201d; \/\/ str\u7684\u5185\u5b58\u4f4d\u4e8e\u6808\u4e0a<\/p>\n

\u2026<\/p>\n

return str; \/\/ \u5c06\u5bfc\u81f4\u9519\u8bef<\/p>\n

}<\/p>\n

\uff082\uff09\u8981\u641e\u6e05\u695a\u8fd4\u56de\u7684\u7a76\u7adf\u662f\u201c\u503c\u201d\u3001\u201c\u6307\u9488\u201d\u8fd8\u662f\u201c\u5f15\u7528\u201d\u3002<\/p>\n

\uff083\uff09\u5982\u679c\u51fd\u6570\u8fd4\u56de\u503c\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8981\u8003\u8651return\u8bed\u53e5\u7684\u6548\u7387\u3002\u4f8b\u5982<\/p>\n

return String(s1 + s2);<\/p>\n

\n\u8fd9\u662f\u4e34\u65f6\u5bf9\u8c61\u7684\u8bed\u6cd5\uff0c\u8868\u793a\u201c\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u5bf9\u8c61\u5e76\u8fd4\u56de\u5b83\u201d\u3002\u4e0d\u8981\u4ee5\u4e3a\u5b83\u4e0e\u201c\u5148\u521b\u5efa\u4e00\u4e2a\u5c40\u90e8\u5bf9\u8c61temp\u5e76\u8fd4\u56de\u5b83\u7684\u7ed3\u679c\u201d\u662f\u7b49\u4ef7\u7684\uff0c\u5982<\/p>\n

String temp(s1 + s2);<\/p>\n

return temp;<\/p>\n

\n\u5b9e\u8d28\u4e0d\u7136\uff0c\u4e0a\u8ff0\u4ee3\u7801\u5c06\u53d1\u751f\u4e09\u4ef6\u4e8b\u3002\u9996\u5148\uff0ctemp\u5bf9\u8c61\u88ab\u521b\u5efa\uff0c\u540c\u65f6\u5b8c\u6210\u521d\u59cb\u5316\uff1b\u7136\u540e\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u628atemp\u62f7\u8d1d\u5230\u4fdd\u5b58\u8fd4\u56de\u503c\u7684\u5916\u90e8\u5b58\u50a8\u5355\u5143\u4e2d\uff1b\u6700\u540e\uff0ctemp\u5728\u51fd\u6570\u7ed3\u675f\u65f6\u88ab\u9500\u6bc1\uff08\u8c03\u7528\u6790\u6784\u51fd\u6570\uff09\u3002\u7136\u800c\u201c\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u5bf9\u8c61\u5e76\u8fd4\u56de\u5b83\u201d\u7684\u8fc7\u7a0b\u662f\u4e0d\u540c\u7684\uff0c\u7f16\u8bd1\u5668\u76f4\u63a5\u628a\u4e34\u65f6\u5bf9\u8c61\u521b\u5efa\u5e76\u521d\u59cb\u5316\u5728\u5916\u90e8\u5b58\u50a8\u5355\u5143\u4e2d\uff0c\u7701\u53bb\u4e86\u62f7\u8d1d\u548c\u6790\u6784\u7684\u5316\u8d39\uff0c\u63d0\u9ad8\u4e86\u6548\u7387\u3002<\/p>\n

\u7c7b\u4f3c\u5730\uff0c\u6211\u4eec\u4e0d\u8981\u5c06<\/p>\n

return int(x + y); \/\/ \u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u5e76\u8fd4\u56de\u5b83<\/p>\n

\u5199\u6210<\/p>\n

int temp = x + y;<\/p>\n

return temp;<\/p>\n

\n\u7531\u4e8e\u5185\u90e8\u6570\u636e\u7c7b\u578b\u5982int,float,double\u7684\u53d8\u91cf\u4e0d\u5b58\u5728\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570\uff0c\u867d\u7136\u8be5\u201c\u4e34\u65f6\u53d8\u91cf\u7684\u8bed\u6cd5\u201d\u4e0d\u4f1a\u63d0\u9ad8\u591a\u5c11\u6548\u7387\uff0c\u4f46\u662f\u7a0b\u5e8f\u66f4\u52a0\u7b80\u6d01\u6613\u8bfb\u3002<\/p>\n

\u00a0<\/p>\n

6.4 \u5176\u5b83\u5efa\u8bae<\/font><\/strong><\/p>\n

\u25cf\u3010\u5efa\u8bae6-4-1\u3011\u51fd\u6570\u7684\u529f\u80fd\u8981\u5355\u4e00\uff0c\u4e0d\u8981\u8bbe\u8ba1\u591a\u7528\u9014\u7684\u51fd\u6570\u3002<\/p>\n

\u25cf\u3010\u5efa\u8bae6-4-2\u3011\u51fd\u6570\u4f53\u7684\u89c4\u6a21\u8981\u5c0f\uff0c\u5c3d\u91cf\u63a7\u5236\u572850\u884c\u4ee3\u7801\u4e4b\u5185\u3002<\/p>\n

\u25cf\u3010\u5efa\u8bae6-4-3\u3011\u5c3d\u91cf\u907f\u514d\u51fd\u6570\u5e26\u6709\u201c\u8bb0\u5fc6\u201d\u529f\u80fd\u3002\u76f8\u540c\u7684\u8f93\u5165\u5e94\u5f53\u4ea7\u751f\u76f8\u540c\u7684\u8f93\u51fa\u3002<\/p>\n

\n\u5e26\u6709\u201c\u8bb0\u5fc6\u201d\u529f\u80fd\u7684\u51fd\u6570\uff0c\u5176\u884c\u4e3a\u53ef\u80fd\u662f\u4e0d\u53ef\u9884\u6d4b\u7684\uff0c\u56e0\u4e3a\u5b83\u7684\u884c\u4e3a\u53ef\u80fd\u53d6\u51b3\u4e8e\u67d0\u79cd\u201c\u8bb0\u5fc6\u72b6\u6001\u201d\u3002\u8fd9\u6837\u7684\u51fd\u6570\u65e2\u4e0d\u6613\u7406\u89e3\u53c8\u4e0d\u5229\u4e8e\u6d4b\u8bd5\u548c\u7ef4\u62a4\u3002\u5728C\/C++\u8bed\u8a00\u4e2d\uff0c\u51fd\u6570\u7684static\u5c40\u90e8\u53d8\u91cf\u662f\u51fd\u6570\u7684\u201c\u8bb0\u5fc6\u201d\u5b58\u50a8\u5668\u3002\u5efa\u8bae\u5c3d\u91cf\u5c11\u7528static\u5c40\u90e8\u53d8\u91cf\uff0c\u9664\u975e\u5fc5\u9700\u3002<\/p>\n

\n\u25cf\u3010\u5efa\u8bae6-4-4\u3011\u4e0d\u4ec5\u8981\u68c0\u67e5\u8f93\u5165\u53c2\u6570\u7684\u6709\u6548\u6027\uff0c\u8fd8\u8981\u68c0\u67e5\u901a\u8fc7\u5176\u5b83\u9014\u5f84\u8fdb\u5165\u51fd\u6570\u4f53\u5185\u7684\u53d8\u91cf\u7684\u6709\u6548\u6027\uff0c\u4f8b\u5982\u5168\u5c40\u53d8\u91cf\u3001\u6587\u4ef6\u53e5\u67c4\u7b49\u3002<\/p>\n

\u25cf\u3010\u5efa\u8bae6-4-5\u3011\u7528\u4e8e\u51fa\u9519\u5904\u7406\u7684\u8fd4\u56de\u503c\u4e00\u5b9a\u8981\u6e05\u695a\uff0c\u8ba9\u4f7f\u7528\u8005\u4e0d\u5bb9\u6613\u5ffd\u89c6\u6216\u8bef\u89e3\u9519\u8bef\u60c5\u51b5\u3002<\/p>\n

\u00a0<\/p>\n

6.5 \u4f7f\u7528\u65ad\u8a00<\/font><\/strong><\/p>\n

\u7a0b\u5e8f\u4e00\u822c\u5206\u4e3aDebug\u7248\u672c\u548cRelease\u7248\u672c\uff0cDebug\u7248\u672c\u7528\u4e8e\u5185\u90e8\u8c03\u8bd5\uff0cRelease\u7248\u672c\u53d1\u884c\u7ed9\u7528\u6237\u4f7f\u7528\u3002<\/p>\n

\n\u65ad\u8a00assert\u662f\u4ec5\u5728Debug\u7248\u672c\u8d77\u4f5c\u7528\u7684\u5b8f\uff0c\u5b83\u7528\u4e8e\u68c0\u67e5\u201c\u4e0d\u5e94\u8be5\u201d\u53d1\u751f\u7684\u60c5\u51b5\u3002\u793a\u4f8b6-5\u662f\u4e00\u4e2a\u5185\u5b58\u590d\u5236\u51fd\u6570\u3002\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679cassert\u7684\u53c2\u6570\u4e3a\u5047\uff0c\u90a3\u4e48\u7a0b\u5e8f\u5c31\u4f1a\u4e2d\u6b62\uff08\u4e00\u822c\u5730\u8fd8\u4f1a\u51fa\u73b0\u63d0\u793a\u5bf9\u8bdd\uff0c\u8bf4\u660e\u5728\u4ec0\u4e48\u5730\u65b9\u5f15\u53d1\u4e86assert\uff09\u3002<\/p>\n

\u00a0<\/p>\n\n\n\n
\n

void *memcpy(void *pvTo, const void *pvFrom, size_t size)<\/p>\n

{<\/p>\n

assert((pvTo != NULL) && (pvFrom
\n!= NULL)); \/\/ \u4f7f\u7528\u65ad\u8a00<\/p>\n

byte *pbTo = (byte *) pvTo; \/\/ \u9632\u6b62\u6539\u53d8pvTo\u7684\u5730\u5740<\/p>\n

byte *pbFrom = (byte *) pvFrom; \/\/ \u9632\u6b62\u6539\u53d8pvFrom\u7684\u5730\u5740<\/p>\n

while(size -- > 0 )<\/p>\n

*pbTo ++ = *pbFrom ++ ;<\/p>\n

return pvTo;<\/p>\n

}<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u793a\u4f8b6-5 \u590d\u5236\u4e0d\u91cd\u53e0\u7684\u5185\u5b58\u5757<\/p>\n

\u00a0<\/p>\n

\nassert\u4e0d\u662f\u4e00\u4e2a\u4ed3\u4fc3\u62fc\u51d1\u8d77\u6765\u7684\u5b8f\u3002\u4e3a\u4e86\u4e0d\u5728\u7a0b\u5e8f\u7684Debug\u7248\u672c\u548cRelease\u7248\u672c\u5f15\u8d77\u5dee\u522b\uff0cassert\u4e0d\u5e94\u8be5\u4ea7\u751f\u4efb\u4f55\u526f\u4f5c\u7528\u3002\u6240\u4ee5assert\u4e0d\u662f\u51fd\u6570\uff0c\u800c\u662f\u5b8f\u3002\u7a0b\u5e8f\u5458\u53ef\u4ee5\u628aassert\u770b\u6210\u4e00\u4e2a\u5728\u4efb\u4f55\u7cfb\u7edf\u72b6\u6001\u4e0b\u90fd\u53ef\u4ee5\u5b89\u5168\u4f7f\u7528\u7684\u65e0\u5bb3\u6d4b\u8bd5\u624b\u6bb5\u3002\u5982\u679c\u7a0b\u5e8f\u5728assert\u5904\u7ec8\u6b62\u4e86\uff0c\u5e76\u4e0d\u662f\u8bf4\u542b\u6709\u8be5assert\u7684\u51fd\u6570\u6709\u9519\u8bef\uff0c\u800c\u662f\u8c03\u7528\u8005\u51fa\u4e86\u5dee\u9519\uff0cassert\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u627e\u5230\u53d1\u751f\u9519\u8bef\u7684\u539f\u56e0\u3002<\/p>\n

\n\u5f88\u5c11\u6709\u6bd4\u8ddf\u8e2a\u5230\u7a0b\u5e8f\u7684\u65ad\u8a00\uff0c\u5374\u4e0d\u77e5\u9053\u8be5\u65ad\u8a00\u7684\u4f5c\u7528\u66f4\u8ba9\u4eba\u6cae\u4e27\u7684\u4e8b\u4e86\u3002\u4f60\u5316\u4e86\u5f88\u591a\u65f6\u95f4\uff0c\u4e0d\u662f\u4e3a\u4e86\u6392\u9664\u9519\u8bef\uff0c\u800c\u53ea\u662f\u4e3a\u4e86\u5f04\u6e05\u695a\u8fd9\u4e2a\u9519\u8bef\u5230\u5e95\u662f\u4ec0\u4e48\u3002\u6709\u7684\u65f6\u5019\uff0c\u7a0b\u5e8f\u5458\u5076\u5c14\u8fd8\u4f1a\u8bbe\u8ba1\u51fa\u6709\u9519\u8bef\u7684\u65ad\u8a00\u3002\u6240\u4ee5\u5982\u679c\u641e\u4e0d\u6e05\u695a\u65ad\u8a00\u68c0\u67e5\u7684\u662f\u4ec0\u4e48\uff0c\u5c31\u5f88\u96be\u5224\u65ad\u9519\u8bef\u662f\u51fa\u73b0\u5728\u7a0b\u5e8f\u4e2d\uff0c\u8fd8\u662f\u51fa\u73b0\u5728\u65ad\u8a00\u4e2d\u3002\u5e78\u8fd0\u7684\u662f\u8fd9\u4e2a\u95ee\u9898\u5f88\u597d\u89e3\u51b3\uff0c\u53ea\u8981\u52a0\u4e0a\u6e05\u6670\u7684\u6ce8\u91ca\u5373\u53ef\u3002\u8fd9\u672c\u662f\u663e\u800c\u6613\u89c1\u7684\u4e8b\u60c5\uff0c\u53ef\u662f\u5f88\u5c11\u6709\u7a0b\u5e8f\u5458\u8fd9\u6837\u505a\u3002\u8fd9\u597d\u6bd4\u4e00\u4e2a\u4eba\u5728\u68ee\u6797\u91cc\uff0c\u770b\u5230\u6811\u4e0a\u9489\u7740\u4e00\u5757\u201c\u5371\u9669\u201d\u7684\u5927\u724c\u5b50\u3002\u4f46\u5371\u9669\u5230\u5e95\u662f\u4ec0\u4e48\uff1f\u6811\u8981\u5012\uff1f\u6709\u5e9f\u4e95\uff1f\u6709\u91ce\u517d\uff1f\u9664\u975e\u544a\u8bc9\u4eba\u4eec\u201c\u5371\u9669\u201d\u662f\u4ec0\u4e48\uff0c\u5426\u5219\u8fd9\u4e2a\u8b66\u544a\u724c\u96be\u4ee5\u8d77\u5230\u79ef\u6781\u6709\u6548\u7684\u4f5c\u7528\u3002\u96be\u4ee5\u7406\u89e3\u7684\u65ad\u8a00\u5e38\u5e38\u88ab\u7a0b\u5e8f\u5458\u5ffd\u7565\uff0c\u751a\u81f3\u88ab\u5220\u9664\u3002[Maguire,
\np8-p30]<\/p>\n

\u00a0<\/p>\n

\n\u25cf\u3010\u89c4\u52196-5-1\u3011\u4f7f\u7528\u65ad\u8a00\u6355\u6349\u4e0d\u5e94\u8be5\u53d1\u751f\u7684\u975e\u6cd5\u60c5\u51b5\u3002\u4e0d\u8981\u6df7\u6dc6\u975e\u6cd5\u60c5\u51b5\u4e0e\u9519\u8bef\u60c5\u51b5\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u540e\u8005\u662f\u5fc5\u7136\u5b58\u5728\u7684\u5e76\u4e14\u662f\u4e00\u5b9a\u8981\u4f5c\u51fa\u5904\u7406\u7684\u3002<\/p>\n

\u25cf\u3010\u89c4\u52196-5-2\u3011\u5728\u51fd\u6570\u7684\u5165\u53e3\u5904\uff0c\u4f7f\u7528\u65ad\u8a00\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\uff08\u5408\u6cd5\u6027\uff09\u3002<\/p>\n

\n\u25cf\u3010\u5efa\u8bae6-5-1\u3011\u5728\u7f16\u5199\u51fd\u6570\u65f6\uff0c\u8981\u8fdb\u884c\u53cd\u590d\u7684\u8003\u67e5\uff0c\u5e76\u4e14\u81ea\u95ee\uff1a\u201c\u6211\u6253\u7b97\u505a\u54ea\u4e9b\u5047\u5b9a\uff1f\u201d\u4e00\u65e6\u786e\u5b9a\u4e86\u7684\u5047\u5b9a\uff0c\u5c31\u8981\u4f7f\u7528\u65ad\u8a00\u5bf9\u5047\u5b9a\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n

\n\u25cf\u3010\u5efa\u8bae6-5-2\u3011\u4e00\u822c\u6559\u79d1\u4e66\u90fd\u9f13\u52b1\u7a0b\u5e8f\u5458\u4eec\u8fdb\u884c\u9632\u9519\u8bbe\u8ba1\uff0c\u4f46\u8981\u8bb0\u4f4f\u8fd9\u79cd\u7f16\u7a0b\u98ce\u683c\u53ef\u80fd\u4f1a\u9690\u7792\u9519\u8bef\u3002\u5f53\u8fdb\u884c\u9632\u9519\u8bbe\u8ba1\u65f6\uff0c\u5982\u679c\u201c\u4e0d\u53ef\u80fd\u53d1\u751f\u201d\u7684\u4e8b\u60c5\u7684\u786e\u53d1\u751f\u4e86\uff0c\u5219\u8981\u4f7f\u7528\u65ad\u8a00\u8fdb\u884c\u62a5\u8b66\u3002<\/p>\n

\u00a0<\/p>\n

6.6 \u5f15\u7528\u4e0e\u6307\u9488\u7684\u6bd4\u8f83<\/font><\/strong><\/p>\n

\n\u5f15\u7528\u662fC++\u4e2d\u7684\u6982\u5ff5\uff0c\u521d\u5b66\u8005\u5bb9\u6613\u628a\u5f15\u7528\u548c\u6307\u9488\u6df7\u6dc6\u4e00\u8d77\u3002\u4e00\u4e0b\u7a0b\u5e8f\u4e2d\uff0cn\u662fm\u7684\u4e00\u4e2a\u5f15\u7528\uff08reference\uff09\uff0cm\u662f\u88ab\u5f15\u7528\u7269\uff08referent\uff09\u3002<\/p>\n

int m;<\/p>\n

int &n = m;<\/p>\n

\nn\u76f8\u5f53\u4e8em\u7684\u522b\u540d\uff08\u7ef0\u53f7\uff09\uff0c\u5bf9n\u7684\u4efb\u4f55\u64cd\u4f5c\u5c31\u662f\u5bf9m\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\u6709\u4eba\u540d\u53eb\u738b\u5c0f\u6bdb\uff0c\u4ed6\u7684\u7ef0\u53f7\u662f\u201c\u4e09\u6bdb\u201d\u3002\u8bf4\u201c\u4e09\u6bdb\u201d\u600e\u4e48\u600e\u4e48\u7684\uff0c\u5176\u5b9e\u5c31\u662f\u5bf9\u738b\u5c0f\u6bdb\u8bf4\u4e09\u9053\u56db\u3002\u6240\u4ee5n\u65e2\u4e0d\u662fm\u7684\u62f7\u8d1d\uff0c\u4e5f\u4e0d\u662f\u6307\u5411m\u7684\u6307\u9488\uff0c\u5176\u5b9en\u5c31\u662fm\u5b83\u81ea\u5df1\u3002<\/p>\n

\u5f15\u7528\u7684\u4e00\u4e9b\u89c4\u5219\u5982\u4e0b\uff1a<\/p>\n

\uff081\uff09\u5f15\u7528\u88ab\u521b\u5efa\u7684\u540c\u65f6\u5fc5\u987b\u88ab\u521d\u59cb\u5316\uff08\u6307\u9488\u5219\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u5019\u88ab\u521d\u59cb\u5316\uff09\u3002<\/p>\n

\uff082\uff09\u4e0d\u80fd\u6709NULL\u5f15\u7528\uff0c\u5f15\u7528\u5fc5\u987b\u4e0e\u5408\u6cd5\u7684\u5b58\u50a8\u5355\u5143\u5173\u8054\uff08\u6307\u9488\u5219\u53ef\u4ee5\u662fNULL\uff09\u3002<\/p>\n

\uff083\uff09\u4e00\u65e6\u5f15\u7528\u88ab\u521d\u59cb\u5316\uff0c\u5c31\u4e0d\u80fd\u6539\u53d8\u5f15\u7528\u7684\u5173\u7cfb\uff08\u6307\u9488\u5219\u53ef\u4ee5\u968f\u65f6\u6539\u53d8\u6240\u6307\u7684\u5bf9\u8c61\uff09\u3002<\/p>\n

\u4ee5\u4e0b\u793a\u4f8b\u7a0b\u5e8f\u4e2d\uff0ck\u88ab\u521d\u59cb\u5316\u4e3ai\u7684\u5f15\u7528\u3002\u8bed\u53e5k =
\nj\u5e76\u4e0d\u80fd\u5c06k\u4fee\u6539\u6210\u4e3aj\u7684\u5f15\u7528\uff0c\u53ea\u662f\u628ak\u7684\u503c\u6539\u53d8\u6210\u4e3a6\u3002\u7531\u4e8ek\u662fi\u7684\u5f15\u7528\uff0c\u6240\u4ee5i\u7684\u503c\u4e5f\u53d8\u6210\u4e866\u3002<\/p>\n

int i = 5;<\/p>\n

int j = 6;<\/p>\n

int &k = i;<\/p>\n

k = j; \/\/ k\u548ci\u7684\u503c\u90fd\u53d8\u6210\u4e866;<\/p>\n

\n\u4e0a\u9762\u7684\u7a0b\u5e8f\u770b\u8d77\u6765\u8c61\u5728\u73a9\u6587\u5b57\u6e38\u620f\uff0c\u6ca1\u6709\u4f53\u73b0\u51fa\u5f15\u7528\u7684\u4ef7\u503c\u3002\u5f15\u7528\u7684\u4e3b\u8981\u529f\u80fd\u662f\u4f20\u9012\u51fd\u6570\u7684\u53c2\u6570\u548c\u8fd4\u56de\u503c\u3002C++\u8bed\u8a00\u4e2d\uff0c\u51fd\u6570\u7684\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7684\u4f20\u9012\u65b9\u5f0f\u6709\u4e09\u79cd\uff1a\u503c\u4f20\u9012\u3001\u6307\u9488\u4f20\u9012\u548c\u5f15\u7528\u4f20\u9012\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u201c\u503c\u4f20\u9012\u201d\u7684\u793a\u4f8b\u7a0b\u5e8f\u3002\u7531\u4e8eFunc1\u51fd\u6570\u4f53\u5185\u7684x\u662f\u5916\u90e8\u53d8\u91cfn\u7684\u4e00\u4efd\u62f7\u8d1d\uff0c\u6539\u53d8x\u7684\u503c\u4e0d\u4f1a\u5f71\u54cdn,
\n\u6240\u4ee5n\u7684\u503c\u4ecd\u7136\u662f0\u3002<\/p>\n

void Func1(int x)<\/p>\n

{<\/p>\n

x = x + 10;<\/p>\n

}<\/p>\n

\u2026<\/p>\n

int n = 0;<\/p>\n

Func1(n);<\/p>\n

cout << \u201cn = \u201d
\n<< n <<
\nendl; \/\/ n = 0<\/p>\n

\u00a0<\/p>\n

\n\u4ee5\u4e0b\u662f\u201c\u6307\u9488\u4f20\u9012\u201d\u7684\u793a\u4f8b\u7a0b\u5e8f\u3002\u7531\u4e8eFunc2\u51fd\u6570\u4f53\u5185\u7684x\u662f\u6307\u5411\u5916\u90e8\u53d8\u91cfn\u7684\u6307\u9488\uff0c\u6539\u53d8\u8be5\u6307\u9488\u7684\u5185\u5bb9\u5c06\u5bfc\u81f4n\u7684\u503c\u6539\u53d8\uff0c\u6240\u4ee5n\u7684\u503c\u6210\u4e3a10\u3002<\/p>\n

void Func2(int *x)<\/p>\n

{<\/p>\n

(* x) = (* x) + 10;<\/p>\n

}<\/p>\n

\u2026<\/p>\n

int n = 0;<\/p>\n

Func2(&n);<\/p>\n

cout << \u201cn = \u201d
\n<< n <<
\nendl; \/\/ n = 10<\/p>\n

\u00a0<\/p>\n

\n\u4ee5\u4e0b\u662f\u201c\u5f15\u7528\u4f20\u9012\u201d\u7684\u793a\u4f8b\u7a0b\u5e8f\u3002\u7531\u4e8eFunc3\u51fd\u6570\u4f53\u5185\u7684x\u662f\u5916\u90e8\u53d8\u91cfn\u7684\u5f15\u7528\uff0cx\u548cn\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\uff0c\u6539\u53d8x\u7b49\u4e8e\u6539\u53d8n\uff0c\u6240\u4ee5n\u7684\u503c\u6210\u4e3a10\u3002<\/p>\n

void Func3(int &x)<\/p>\n

{<\/p>\n

x = x + 10;<\/p>\n

}<\/p>\n

\u2026<\/p>\n

int n = 0;<\/p>\n

Func3(n);<\/p>\n

cout << \u201cn = \u201d
\n<< n <<
\nendl; \/\/ n = 10<\/p>\n

\u00a0<\/p>\n

\n\u5bf9\u6bd4\u4e0a\u8ff0\u4e09\u4e2a\u793a\u4f8b\u7a0b\u5e8f\uff0c\u4f1a\u53d1\u73b0\u201c\u5f15\u7528\u4f20\u9012\u201d\u7684\u6027\u8d28\u8c61\u201c\u6307\u9488\u4f20\u9012\u201d\uff0c\u800c\u4e66\u5199\u65b9\u5f0f\u8c61\u201c\u503c\u4f20\u9012\u201d\u3002\u5b9e\u9645\u4e0a\u201c\u5f15\u7528\u201d\u53ef\u4ee5\u505a\u7684\u4efb\u4f55\u4e8b\u60c5\u201c\u6307\u9488\u201d\u4e5f\u90fd\u80fd\u591f\u505a\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u8981\u201c\u5f15\u7528\u201d\u8fd9\u4e1c\u897f\uff1f<\/p>\n

\u7b54\u6848\u662f\u201c\u7528\u9002\u5f53\u7684\u5de5\u5177\u505a\u6070\u5982\u5176\u5206\u7684\u5de5\u4f5c\u201d\u3002<\/p>\n

\n\u6307\u9488\u80fd\u591f\u6beb\u65e0\u7ea6\u675f\u5730\u64cd\u4f5c\u5185\u5b58\u4e2d\u7684\u5982\u4f55\u4e1c\u897f\uff0c\u5c3d\u7ba1\u6307\u9488\u529f\u80fd\u5f3a\u5927\uff0c\u4f46\u662f\u975e\u5e38\u5371\u9669\u3002\u5c31\u8c61\u4e00\u628a\u5200\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u780d\u6811\u3001\u88c1\u7eb8\u3001\u4fee\u6307\u7532\u3001\u7406\u53d1\u7b49\u7b49\uff0c\u8c01\u6562\u8fd9\u6837\u7528\uff1f<\/p>\n

\n\u5982\u679c\u7684\u786e\u53ea\u9700\u8981\u501f\u7528\u4e00\u4e0b\u67d0\u4e2a\u5bf9\u8c61\u7684\u201c\u522b\u540d\u201d\uff0c\u90a3\u4e48\u5c31\u7528\u201c\u5f15\u7528\u201d\uff0c\u800c\u4e0d\u8981\u7528\u201c\u6307\u9488\u201d\uff0c\u4ee5\u514d\u53d1\u751f\u610f\u5916\u3002\u6bd4\u5982\u8bf4\uff0c\u67d0\u4eba\u9700\u8981\u4e00\u4efd\u8bc1\u660e\uff0c\u672c\u6765\u5728\u6587\u4ef6\u4e0a\u76d6\u4e0a\u516c\u7ae0\u7684\u5370\u5b50\u5c31\u884c\u4e86\uff0c\u5982\u679c\u628a\u53d6\u516c\u7ae0\u7684\u94a5\u5319\u4ea4\u7ed9\u4ed6\uff0c\u90a3\u4e48\u4ed6\u5c31\u83b7\u5f97\u4e86\u4e0d\u8be5\u6709\u7684\u6743\u5229\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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