{"id":75391,"date":"2026-02-12T08:34:21","date_gmt":"2026-02-12T00:34:21","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75391.html"},"modified":"2026-02-12T08:34:21","modified_gmt":"2026-02-12T00:34:21","slug":"%e8%af%8d%e6%b3%95%e5%88%86%e6%9e%901%ef%bc%9a%e4%bb%8edemo%e4%bb%a3%e7%a0%81%e4%b8%ad%e6%8a%bd%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75391.html","title":{"rendered":"\u8bcd\u6cd5\u5206\u6790(1)\uff1a\u4ecedemo\u4ee3\u7801\u4e2d\u62bd\u8c61"},"content":{"rendered":"

\u672c\u7cfb\u5217\u8bb2\u4e49\u9002\u7528\u4e8e：\u88ab\u5f3a\u8feb\u5b66\u4e60\u7f16\u8bd1\u539f\u7406\u524d\u7aef，\u6216\u8005\u5e0c\u671b\u5f04\u660e\u767d\u5982\u4f55\u505a\u79d1\u7814\u7684\u4eba<\/p>\n

\u524d\u8a00<\/h2>\n

\u8bcd\u6cd5\u5206\u6790\u662f\u7f16\u8bd1\u539f\u7406\u5bf9\u521d\u5b66\u8005\u7684\u4e0b\u9a6c\u5a01，\u662f\u4e00\u4e2a\u9a6c\u4e0a\u5c31\u5f00\u59cb\u8ba9\u4eba\u8ff7\u60d1\u7684\u7ae0\u8282\u3002\u201c\u5230\u5e95\u5b66\u8fd9\u4e9b\u4ec0\u4e483\u578b\u6587\u6cd5\u6982\u5ff5\u5e72\u561b\u7684，\u6211\u4e0d\u7528\u8fd9\u4e9b\u6982\u5ff5\u4e0d\u884c\u5417？\u201d\u7c7b\u4f3c\u7684\u7591\u95ee\u60f3\u5fc5\u4e0d\u7edd\u4e8e\u8033\u3002\u56e0\u6b64，\u672c\u6587\u5c06\u4ece\u4e00\u4e2a\u6781\u7b80\u5355\u7684\u4f8b\u5b50\u51fa\u53d1，\u9010\u6b65\u63d0\u9ad8\u96be\u5ea6，\u6700\u7ec8\u89e3\u91ca\u6e05\u695a\u4e3a\u4ec0\u4e48\u7279\u4e8b\u7279\u529e\u7684\u6c11\u79d1\u65b9\u6cd5\u6ca1\u6709\u524d\u9014，\u7ec8\u7a76\u8981\u7814\u7a76\u4e00\u70b9\u7406\u8bba，\u624d\u80fd\u8ba9\u81ea\u5df1\u5728\u9047\u5230\u540c\u7c7b\u95ee\u9898\u7684\u65f6\u5019\u9047\u795e\u6740\u795e\u9047\u4f5b\u6740\u4f5b\u3002<\/p>\n

\u56e0\u6b64，\u5982\u679c\u4f60\u5728\u5feb\u901f\u6d4f\u89c8\u672c\u6587\u7684\u8fc7\u7a0b\u4e2d\u770b\u5230\u4e00\u4e9b\u548c\u8bfe\u672c\u4e0a\u5b8c\u5168\u4e0d\u4e00\u6837\u7684\u5f0f\u5b50，\u4e0d\u8981\u5bb3\u6015，\u8fd9\u662f\u8fd8\u5728\u63a8\u5bfc，\u6700\u540e\u51fa\u6765\u7684\u4e00\u5b9a\u662f\u4f60\u719f\u6089\u7684\u90a3\u4e2a\u6b63\u5219\u95ee\u9898\u3002<\/p>\n

<\/h3>\n

\u7b2c\u4e00\u5f0f：\u89c1\u5fae\u77e5\u8457，\u4ece\u7b80\u5355\u793a\u4f8b\u5f00\u59cb\u7814\u7a76\u95ee\u9898<\/h2>\n

\u5148\u6765\u770b\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u7a0b\u5e8f：<\/p>\n

int main() { int a = 15 + 2; \/\/This is a comment }<\/p>\n

\u5c31\u8fd9\u4e48\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f，\u5b83\u5728\u786c\u76d8\u91cc\u662f\u8fd9\u6837\u7684<\/p>\n<\/p>\n

\"\"<\/p>\n

\u6dfb\u52a0\u56fe\u7247\u6ce8\u91ca，\u4e0d\u8d85\u8fc7 140 \u5b57（\u53ef\u9009）<\/p>\n

\u53ef\u4ee5\u770b\u5230，\u539f\u672c\u5728\u4eba\u773c\u4e2d\u50cf\u753b\u4e00\u6837\u4ee5\u4e8c\u7ef4\u5f62\u5f0f\u94fa\u5f00\u7684\u4ee3\u7801，\u5728\u5e95\u5c42\u770b\u6765\u53ea\u4e0d\u8fc7\u5c31\u662f\u4e00\u4e32\u7b26\u53f7\u3002\u4e4b\u6240\u4ee5\u80fd\u770b\u5230\u7f8e\u5999\u7684\u683c\u5f0f，\u65e0\u975e\u662f\u56e0\u4e3a\u673a\u5668\u77e5\u9053\u9047\u5230\\\\r\\\\n\u4e4b\u540e\u8981\u4ece\u65b0\u7684\u4e00\u884c\u6253\u5370\u540e\u7eed\u7b26\u53f7\u3002<\/p>\n

\u8981\u7cbe\u786e\u548c\u9ad8\u6548\u8bc6\u522b\u8fd9\u5806\u4ec0\u4e48\u90fd\u6709\u7684\u6df7\u5408\u7269\u4e2d\u6bcf\u4e00\u79cd\u6210\u4efd，\u4f60\u9996\u5148\u5e94\u8be5\u4e86\u89e3\u4f60\u5373\u5c06\u8981\u9762\u5bf9\u7684\u662f\u4ec0\u4e48，\u624d\u80fd\u66f4\u597d\u5730\u5b9a\u4e49\u4f60\u95ee\u9898\u7684\u8fb9\u754c，\u800c\u4e0d\u4f1a\u8003\u8651\u592a\u591a\u5b9e\u9645\u4e0a\u5e76\u4e0d\u4f1a\u9047\u5230\u7684\u95ee\u9898<\/p>\n

\u5bf9\u4e8e\u6211\u4eec\u7684\u4ee3\u7801\u800c\u8a00，\u9996\u5148\u8981\u505a\u7684\u5c31\u662f\u7b5b\u9009\u51fa\u5355\u8bcd\u7684\u79cd\u7c7b，\u518d\u5206\u522b\u7814\u7a76\u5b83\u4eec\u7684\u7279\u70b9，\u5206\u800c\u6cbb\u4e4b\u3002<\/p>\n

<\/h3>\n

\u7b2c\u4e8c\u5f0f：\u5206\u800c\u6cbb\u4e4b<\/h2>\n

\u901a\u8fc7\u5206\u7c7b，\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u7684\u7b26\u53f7\u53ef\u4ee5\u6574\u7406\u6210\u4ee5\u4e0b\u51e0\u7c7b：<\/p>\n

1\u3002\u5173\u952e\u8bcd（\u4fdd\u7559\u5b57）\u3002int\u3002\u8fd9\u4e00\u7c7b\u7684\u5355\u8bcd\u7279\u70b9\u662f，\u7edd\u5bf9\u4e0d\u4f1a\u548c\u5176\u4ed6\u7c7b\u522b\u7684\u5355\u8bcd\u91cd\u590d，\u4ed6\u7684\u79cd\u7c7b\u6709\u9650，\u5c31\u662f\u4e00\u4e9b\u82f1\u6587\u5b57\u7b26\u4e32\u3002<\/p>\n

2\u3002\u8fd0\u7b97\u7b26\u3002+\u3002\u4f5c\u7528\u5c31\u662f\u53c2\u4e0e\u8fd0\u7b97，\u79cd\u7c7b\u4e5f\u662f\u6781\u5176\u6709\u9650\u3002<\/p>\n

3\u3002\u754c\u9650\u7b26\u3002{}, (), \u7a7a\u683c，;\u3002\u4f5c\u7528\u5c31\u662f\u8ba9\u673a\u5668\u5728\u540e\u7eed\u5206\u6790\u7684\u65f6\u5019，\u77e5\u9053\u5f53\u524d\u5206\u6790\u7684\u8fd9\u4e2a\u8bed\u6cd5\u5355\u5143\u4ece\u54ea\u5f00\u59cb\u5230\u54ea\u7ed3\u675f\u3002\u4ed6\u7684\u79cd\u7c7b\u4e5f\u662f\u6781\u5176\u6709\u9650\u3002<\/p>\n

4\u3002\u7a7a\u767d\u5b57\u7b26，\u6362\u884c\u3002\\\\r\\\\n\u3002\u5bf9\u4ee3\u7801\u51e0\u4e4e\u5b8c\u5168\u6ca1\u5f71\u54cd\u7684\u7b26\u53f7，\u53ef\u4ee5\u5728\u8bc6\u522b\u5230\u4e4b\u540e\u76f4\u63a5\u5ffd\u7565\u3002<\/p>\n

5\u3002\u6807\u8bc6\u7b26\u3002main, a\u3002\u5141\u8bb8\u7528\u6237\u81ea\u5b9a\u4e49\u8d77\u540d\u3002\u7ec4\u6210\u7684\u89c4\u5219\u6709\u9650\u5236，\u957f\u5ea6\u4e0d\u5b9a，\u79cd\u7c7b\u4e5f\u4e0d\u786e\u5b9a\u3002<\/p>\n

6\u3002\u5e38\u91cf\u300215, 2\u3002\u9664\u4e86\u6570\u5b57\u5916，\u8fd8\u6709\u53ef\u80fd\u5305\u542b16\u8fdb\u5236\u6570\u6240\u9644\u52a0\u7684a-fx；\u53e6\u5916\u8fd8\u6709\u4e00\u7c7b\u5e38\u91cf\u53eb\u5b57\u7b26\u4e32，\u91cc\u9762\u662f\u4ec0\u4e48\u7b26\u53f7\u90fd\u53ef\u4ee5\u5305\u542b\u3002\u6240\u4ee5\u5e38\u91cf\u548c\u6807\u8bc6\u7b26\u4e00\u6837，\u79cd\u7c7b\u548c\u957f\u5ea6\u4e5f\u90fd\u5b8c\u5168\u4e0d\u786e\u5b9a\u3002<\/p>\n

7\u3002\u6ce8\u91ca\u3002 \/\/This is a comment\u3002\u5bf9\u4e8e\u6ce8\u91ca\u800c\u8a00，\u53ea\u8981\u627e\u5230\u4ed6\u6807\u8bb0\u7684\u5f00\u59cb\u548c\u7ed3\u675f，\u518d\u957f\u4e5f\u90fd\u53ef\u4ee5\u770b\u4f5c\u4e00\u4e2a\u6574\u4f53\u3002<\/p>\n

\u5bf9\u4e8e\u7e41\u6742\u7684\u5206\u7c7b，\u4e00\u7c7b\u4e00\u7c7b\u6cbb\u7406\u53ea\u4f1a\u6d6a\u8d39\u7cbe\u529b\u548c\u65f6\u95f4\u3002\u6240\u4ee5\u63a5\u4e0b\u6765\u5c31\u9700\u8981\u5bf9\u5b83\u4eec\u8fdb\u884c\u5f52\u7c7b，\u4ece\u800c\u964d\u4f4e\u81ea\u5df1\u601d\u8003\u7684\u96be\u5ea6\u5e76\u53d1\u73b0\u5171\u6027\u65b9\u6cd5，\u6700\u7ec8\u7edf\u4e00\u5904\u7406\u4ed6\u4eec，\u5408\u800c\u6cbb\u4e4b\u3002<\/p>\n

\u5bb9\u6613\u89c2\u5bdf\u5230：<\/p>\n

\u5bf9\u4e8e\u524d\u56db\u7c7b，\u7531\u4e8e\u90fd\u662f\u79cd\u7c7b\u4e0e\u957f\u5ea6\u4e5f\u6709\u9650，\u901a\u8fc7\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u5339\u914d\u5c31\u53ef\u4ee5\u8bc6\u522b\u51fa\u6765，\u8fd9\u4e00\u7c7b\u5b9e\u73b0\u8d77\u6765\u6ca1\u6709\u96be\u5ea6，\u5148\u4e0d\u8003\u8651\u3002<\/p>\n

\u5bf9\u4e8e\u540e\u4e09\u7c7b，\u5219\u9700\u8981\u901a\u8fc7\u7279\u5b9a\u89c4\u5219\u8fdb\u884c\u5339\u914d\u3002\u90a3\u4e48，\u8fd9\u4e9b\u89c4\u5219\u662f\u4ec0\u4e48？<\/p>\n

a. \u6807\u8bc6\u7b26：\u53ea\u8981\u7b2c\u4e00\u4f4d\u4e0d\u662f\u6570\u5b57，\u540e\u9762\u968f\u4fbf\u4f60\u653e\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u6216\u8005\u5b57\u6bcd\u3002<\/p>\n

b. \u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u5e38\u6570：\u4ece\u524d\u5230\u540e\u5168\u90e8\u90fd\u662f\u6570\u5b57\u3002<\/p>\n

\u4e0b\u9762\u8bf7\u8bfb\u8005\u72ec\u7acb\u5b8c\u6210\u5bf9\u5e94\u7684\u8bc6\u522b\u7a0b\u5e8f\u3002<\/p>\n

\u556a\u7684\u4e00\u58f0，\u5f88\u5feb\u554a，gemini\u9a6c\u4e0a\u5c31\u7ed9\u51fa\u4e86\u4e00\u4e2a\u6837\u4f8b\u4f2a\u4ee3\u7801：<\/p>\n

\u83b7\u53d6 \u5355\u8bcd\u7684 \u7b2c\u4e00\u4e2a\u5b57\u7b26
\nif \u7b2c\u4e00\u4e2a\u5b57\u7b26 \u4e0d\u662f \u6570\u5b57:
\n \/\/ \u53ef\u80fd\u662f\u6807\u8bc6\u7b26，\u68c0\u67e5\u4e00\u4e0b\u540e\u9762
\n for \u7b2c\u4e8c\u4e2a\u5230\u6700\u540e\u4e00\u4e2a\u5b57\u7b26:
\nif \u8fd9\u4e2a\u5b57\u7b26 \u4e0d\u662f (\u5b57\u6bcd or \u6570\u5b57 or \u4e0b\u5212\u7ebf):
\n return "\u65e0\u6548\u6807\u8bc6\u7b26 (\u542b\u975e\u6cd5\u5b57\u7b26)"
\n\/\/ if\u5faa\u73af\u68c0\u67e5\u5b8c\u6bd5\u90fd\u6ca1\u95ee\u9898
\nreturn "\u6807\u8bc6\u7b26"
\nelse
\nif \u7b2c\u4e00\u4e2a\u5b57\u7b26 \u4e0d\u662f \u6570\u5b57:
\n\/\/ \u53ef\u80fd\u662f\u5341\u8fdb\u5236\u5e38\u6570，\u68c0\u67e5\u4e00\u4e0b
\nfor \u5355\u8bcd\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5b57\u7b26:
\nif \u8fd9\u4e2a\u5b57\u7b26 \u4e0d\u662f \u6570\u5b57:
\nreturn "\u65e0\u6548\u5355\u8bcd (\u6570\u5b57\u5f00\u5934\u5374\u6709\u975e\u6570\u5b57)"
\n\/\/ \u5982\u679c\u5faa\u73af\u68c0\u67e5\u5b8c\u6bd5\u90fd\u6ca1\u95ee\u9898
\nreturn "\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u5e38\u6570"
\nelse
\nreturn "\u65e0\u6548\u6807\u8bc6\u7b26 (\u542b\u975e\u6cd5\u5b57\u7b26)"<\/p>\n

Emmmm，\u5f88\u597d\u3002\u770b\u6765\u6211\u4eec\u5df2\u7ecf\u53ef\u4ee5\u5f88\u597d\u5730\u8bc6\u522b\u8fd9\u4e24\u7c7b\u5355\u8bcd\u4e86\u3002\u8bcd\u6cd5\u5206\u6790\u4e5f\u4e0d\u8fc7\u5982\u6b64\u561b，\u90a3\u6211\u4eec\u7ee7\u7eed\u5f00\u59cb\u8bed\u6cd5\u5206\u6790\u5427！<\/p>\n

\u8001\u677f：\u7a0d\u7b49\u4e00\u4e0b，\u90a3\u4e2a\u8c01，\u6211\u8fd9\u7a0b\u5e8f\u91cc\u6709\u51e0\u7c7b\u65b0\u7684\u5e38\u91cf，\u89c4\u5219\u4e5f\u7ed9\u5230\u4f60\u4e86，\u4f60\u5e2e\u6211\u4e5f\u5b9e\u73b0\u4e00\u4e0b\u3002<\/p>\n

c. \u5341\u516d\u8fdb\u5236\u5e38\u6570：0x\u5f00\u5934\u7684，\u540e\u9762\u8ddf\u77400-9a-f；<\/p>\n

d. \u5e26\u7b26\u53f7\u6574\u6570：\u6bd4\u65e0\u7b26\u53f7\u6574\u6570\u53ef\u80fd\u4f1a\u591a\u4e86\u4e00\u4e2a\u6b63\u8d1f\u53f7；<\/p>\n

\u4f60：\u597d\u7684\u8001\u677f，\u8fd9\u51e0\u4e2a\u597d\u5f04，\u6211\u9a6c\u4e0a\u5f04\u597d\u3002<\/p>\n

\u5657\u55e4\u5657\u55e4\u4e00\u9635\u6363\u9f13\u3002<\/p>\n

\u4f60：\u8001\u677f\u6211\u5f04\u597d\u4e86\u3002<\/p>\n

\u8001\u677f：\u597d\u7684\u8c22\u8c22\u3002\u90a3\u5565，\u8fd9\u91cc\u53c8\u6765\u51e0\u7c7b\u65b0\u7684，\u4f60\u518d\u5904\u7406\u4e00\u4e0b：<\/p>\n

e. \u5e26\u4e0b\u5212\u7ebf\u7684\u6574\u6570：\u5728\u6574\u6570\u4e2d\u95f4\u5141\u8bb8\u4e0b\u5212\u7ebf\u5b58\u5728,\u4f46\u4e0b\u5212\u7ebf\u4e0d\u4f1a\u51fa\u73b0\u5728\u6700\u540e\u548c\u6700\u524d，\u4ee5\u53ca\u4e0d\u4f1a\u51fa\u73b0\u8fde\u7eed\u4e24\u4e2a\u4e0b\u5212\u7ebf<\/p>\n

\u4f60：？？？\u8fd8\u80fd\u8fd9\u6837？<\/p>\n

\u8001\u677f：Python\u65e9\u5c31\u7528\u4e0a\u4e86\u5440<\/p>\n

\u4f60：\u4e0d\u5e72\u4e86\u4e0d\u5e72\u4e86！！！\u4ec0\u4e48\u9b3c，\u4e71\u52a0\u9700\u6c42，\u4e0d\u80fd\u4e00\u5f00\u59cb\u5c31\u60f3\u597d\u5417？？<\/p>\n

\u8001\u677f：\u4e0d\u597d\u610f\u601d，\u771f\u7684\u4e0d\u884c，\u9700\u6c42\u662f\u4e0d\u65ad\u53d8\u5316\u7684\u3002\u90a3\u8fd9\u4e2a\u5de5\u4f5c\u4f60\u662f\u5e72\u8fd8\u662f\u4e0d\u5e72？<\/p>\n

\u4f60：\u4e0d\u662f\u8001\u677f\u4f60\u8fd9\u9700\u6c42\u52a0\u5f97\u592a\u79bb\u8c31\u4e86\u5440，\u540e\u9762\u6765\u7684\u9700\u6c42\u8fd8\u4f1a\u548c\u524d\u9762\u7684\u9700\u6c42\u6253\u67b6，\u6211\u8fd9\u4ee3\u7801\u6539\u6765\u6539\u53bb\u90fd\u6210\u6d46\u7cca\u4e86\u5440！！<\/p>\n

\u8001\u677f：\u90a3\u6709\u6ca1\u6709\u53ef\u80fd，\u6709\u66f4\u52a0\u7b80\u5355\u7684\u4ee3\u7801\u5b9e\u73b0\u5462？<\/p>\n

\u4f60：<\/p>\n<\/p>\n

\"\"<\/p>\n<\/p>\n

\u66f9\u8001\u677f\u522b\u6025\u7740\u628a\u5929\u804a\u6b7b\u3002\u6ca1\u51c6\u62e8\u5f00\u8ff7\u96fe\u540e\u4f1a\u6709\u60ca\u559c\u5462\u3002<\/p>\n<\/p>\n

\u7b2c\u4e09\u5f0f：\u89c4\u8303\u5316\u4e0e\u62bd\u8c61<\/h2>\n

\u4e0b\u9762\u901a\u8fc7\u9010\u6b65\u7684\u62bd\u8c61，\u6765\u8ba9\u6211\u4eec\u9010\u6e10\u5230\u8fbe\u4e8b\u60c5\u7684\u672c\u8d28\u3002<\/p>\n

\u9996\u5148\u8981\u62bd\u8c61\/\u5316\u7b80\u7684，\u5c31\u662f\u8fd9\u4e9b\u8be5\u6b7b\u7684，\u7528\u81ea\u7136\u8bed\u8a00\u63cf\u8ff0\u7684abcde\u4e94\u6761\u89c4\u5219\u3002\u4ed6\u4eec\u6700\u5927\u7684\u95ee\u9898\u5c31\u662f\u90fd\u5404\u6709\u5404\u7684\u8bf4\u6cd5\u3002\u6240\u4ee5\u4e3a\u4e86\u627e\u5230\u5171\u540c\u70b9，\u9996\u5148\u8981\u8ba9\u4ed6\u4eec\u7528\u7edf\u4e00\u7684\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0，\u4e5f\u5373\u6240\u8c13\u7684\u89c4\u8303\u5316，\u7b97\u662f\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u7684\u5bf9\u9f50\u9897\u7c92\u5ea6\u3002<\/p>\n

a. \u6807\u8bc6\u7b26：\u53ea\u8981\u7b2c\u4e00\u4f4d\u4e0d\u662f\u6570\u5b57，\u540e\u9762\u968f\u4fbf\u4f60\u653e\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u6216\u8005\u5b57\u6bcd\u3002
\nb. \u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u5e38\u6570：\u4ece\u524d\u5230\u540e\u5168\u90e8\u90fd\u662f\u6570\u5b57\u3002
\nc. \u5341\u516d\u8fdb\u5236\u5e38\u6570：0x\u5f00\u5934\u7684，\u540e\u9762\u8ddf\u77400-9a-f；
\nd. \u5e26\u7b26\u53f7\u6574\u6570：\u6bd4\u65e0\u7b26\u53f7\u6574\u6570\u53ef\u80fd\u4f1a\u591a\u4e86\u4e00\u4e2a\u6b63\u8d1f\u53f7；
\ne. \u5e26\u4e0b\u5212\u7ebf\u7684\u6574\u6570：\u5728\u6574\u6570\u4e2d\u95f4\u5141\u8bb8\u4e0b\u5212\u7ebf\u5b58\u5728,\u4f46\u4e0b\u5212\u7ebf\u4e0d\u4f1a\u51fa\u73b0\u5728\u6700\u540e\u548c\u6700\u524d，\u4ee5\u53ca\u4e0d\u4f1a\u51fa\u73b0\u8fde\u7eed\u4e24\u4e2a\u4e0b\u5212\u7ebf<\/p>\n

\u53ef\u4ee5\u9690\u7ea6\u770b\u51fa\u6765，\u4e00\u65e6\u524d\u9762\u7684\u7b26\u53f7\u786e\u5b9a\u4e86，\u90a3\u4e48\u4e0b\u4e00\u4f4d\u7b26\u53f7\u7684\u53ef\u9009\u8303\u56f4\u4e5f\u5c31\u786e\u5b9a\u4e86\u3002<\/p>\n

\u7531\u6b64，\u8fd9\u51e0\u6761\u89c4\u5219\u90fd\u89c4\u8303\u5316\u6210：\u5f53\u524d\u5982\u679c\u662f\u67d0\u4e2a\u7b26\u53f7，\u90a3\u4e48\u5b83\u540e\u9762\u53ef\u4ee5\u662f\u4ec0\u4e48\u7b26\u53f7\u3002<\/p>\n

\u4f46\u7b49\u4e00\u4e0b，\u6700\u5f00\u59cb\u7684\u65f6\u5019\u5b57\u7b26\u4e32\u8fd8\u6ca1\u6709\u751f\u6210，\u5e76\u6ca1\u6709\u4ec0\u4e48\u7b26\u53f7\u3002\u90a3\u6211\u4eec\u5047\u8bbe\u53e5\u5b50\u7684\u6700\u524d\u9762\u6709\u4e2a\u8868\u793a\u7a7a\u6c14\u7684\u7b26\u53f7\u03b5（\u97f3：epsilon，\u4e3b\u8981\u662f\u5bf9\u5e94\u4e8eEmpty，\u4f46\u76f4\u63a5\u7528E\u53c8\u5bb9\u6613\u60f9\u8bef\u4f1a\u3002\u6709\u7684\u6559\u6750\u4f7f\u7528\u03bb，\u610f\u4e3a\u865a\u65e0），\u6700\u540e\u4e5f\u6709\u4e00\u4e2a\u6587\u4ef6\u7ed3\u675f\u7b26EOF\u6216\u7279\u6b8a\u7b26\u53f7$\u4f5c\u4e3a\u7ed3\u675f\u7b26，\u8fd9\u6837\u5c31\u53ef\u4ee5\u89c4\u8303\u5316\u4e3a：<\/p>\n

a：\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u03b5，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662f\u5b57\u6bcd\u6216\u4e0b\u5212\u7ebf；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u5b57\u6bcd\u6216\u4e0b\u5212\u7ebf\u6216\u6570\u5b57，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662f\u5b57\u6bcd\u6216\u8005\u4e0b\u5212\u7ebf\u6216\u8005\u6570\u5b57\u6216\u8005\u7ed3\u675f\u7b26；
\nb：\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u03b5，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f0-9\u4e4b\u4e00，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00\u6216\u8005\u7ed3\u675f\u7b26；
\nc：\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u03b5，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662f0；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f0，\u540e\u9762\u53ef\u4ee5\u662fx；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662fx，\u540e\u9762\u53ef\u4ee5\u662f0-9a-fA-F\u4e4b\u4e00；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f0-9a-fA-F\u4e4b\u4e00，\u540e\u9762\u53ef\u4ee5\u662f0-9a-fA-F\u4e4b\u4e00\u6216\u8005\u7ed3\u675f\u7b26；
\nd：\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u03b5，\u540e\u9762\u53ef\u4ee5\u662f\u6b63\u8d1f\u53f7\u6216\u80050-9；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u6b63\u8d1f\u53f7，\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f0-9\u4e4b\u4e00，\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00\u6216\u8005\u7ed3\u675f\u7b26；
\ne：\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u03b5，\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f0-9\u4e4b\u4e00，\u540e\u9762\u53ef\u4ee5\u662f0-9\u4e4b\u4e00\u6216\u8005\u4e0b\u5212\u7ebf\u6216\u8005\u7ed3\u675f\u7b26；\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662f\u4e0b\u5212\u7ebf，\u540e\u9762\u53ef\u4ee5\u662f\u6570\u5b57\u3002<\/p>\n

\u5ff5\u7ecf\u4e00\u6837\u67af\u71e5\u65e0\u5473\u5bf9\u5427，\u4f46\u7edd\u5bf9\u6bd4\u4e4b\u524d\u7684\u7248\u672c\u8981\u6e05\u6670\u548c\u65e0\u6b67\u4e49\u3002<\/p>\n

<\/h3>\n

\u7b2c\u56db\u5f0f：\u5408\u800c\u6cbb\u4e4b<\/h2>\n

\u6709\u4e86\u89c4\u5219\u4e4b\u540e，\u6211\u4eec\u6765\u60f3\u8c61\u4e00\u53f0\u751f\u6210\u8fd9\u4e9b\u5355\u8bcd\u7684\u673a\u5668，\u8fd9\u53f0\u673a\u5668\u4f1a\u50cf\u96ea\u7cd5\u673a\u90a3\u6837\u4e0d\u505c\u5730\u5c59\u51fa\u6765\u7b26\u53f7，\u5173\u952e\u5728\u4e8e\u7279\u5b9a\u673a\u5668\u5c59\u51fa\u6765\u7684\u5355\u8bcd\u6700\u540e\u4e00\u5b9a\u7b26\u5408\u89c4\u5219\u3002<\/p>\n

\u4e0a\u9762\u89c4\u8303\u5316\u7684\u89c4\u5219\u5012\u662f\u6709\u90a3\u4e48\u4e00\u56de\u4e8b\u4e86，\u4f46\u4f60\u60f3\u8981\u8ba9\u673a\u5668\u542c\u660e\u767d，\u597d\u50cf\u8fd8\u5dee\u90a3\u4e48\u4e00\u70b9\u610f\u601d\u3002\u673a\u5668\u53ea\u770b\u5f97\u61c2\u7b26\u53f7，\u770b\u4e0d\u61c2\u81ea\u7136\u8bed\u8a00\u3002<\/p>\n

\u806a\u660e\u7684\u4f60\u4e00\u5b9a\u60f3\u5230\u4e86，\u90a3\u6211\u7528\u516c\u5f0f\u6765\u8868\u793a\u8fd9\u4e9b\u89c4\u5219\u4e0d\u5c31\u597d\u4e86\u4e48\u3002\u95ee\u9898\u662f，\u4f60\u8981\u600e\u4e48\u5b9a\u4e49\u4f60\u7684\u516c\u5f0f\u89c4\u5219\u5462？<\/p>\n

\u5982\u679c\u5f53\u524d\u7b26\u53f7\u662fx，\u90a3\u4e48\u540e\u9762\u53ef\u4ee5\u662fy<\/p>\n

\u2192if ch==x then y \/\/\u7531\u4e8eif ch==\u8fd9\u6837\u7684\u5f00\u5934\u5728\u6bcf\u6761\u5f0f\u5b50\u91cc\u90fd\u662f\u4e00\u6837\u7684，\u53ef\u4ee5\u7701\u7565\u3002<\/p>\n

\u2192x->y \/\/\u7531\u4e8ex then y\u8fd8\u662f\u592a\u9ebb\u70e6\u4e86，\u628a\u4e2d\u95f4\u7684then\u6362\u6210\u7bad\u5934\u8868\u793a\u8ddf\u968f<\/p>\n

\u5bf9\u4e8ex\u6216y\u6709\u591a\u4e2a\u9009\u9879\u7684\u573a\u5408，\u7528\u96c6\u5408\u6765\u8868\u793a，\u5982：<\/p>\n

x->[a-f0-9]<\/p>\n

\u53e6\u5916\u8fd8\u662f\u7528\u5e0c\u814a\u5b57\u6bcd\u03b5\u8868\u793a\u5f00\u59cb\u3002\u90a3\u6211\u4eec\u5c31\u53ef\u4ee5\u628a\u4e0a\u9762\u7684\u89c4\u5219a\u4ee5\u5982\u4e0b\u5f62\u5f0f\u5c55\u793a（\u5176\u4ed6\u51e0\u4e2a\u8bf7\u8bfb\u8005\u81ea\u884c\u8f6c\u6362）：<\/p>\n

a：\u03b5->[a-zA-Z_]；[a-zA-Z_0-9]->[a-zA-Z_0-9$]；<\/p>\n

\u554a，\u4e00\u8eab\u6e05\u723d，\u8fd9\u4e0b\u89c4\u5219\u4e5f\u6709\u4e86，\u90a3\u5dee\u4e0d\u591a\u53ef\u4ee5\u5c0f\u8bd5\u4e00\u4e0b\u725b\u5200\u4e86\u5427？<\/p>\n

f：\u4ee5a\u5f00\u5934，b\u505a\u7ed3\u5c3e，\u4e2d\u95f4\u8981\u6709\u5076\u6570\u4e2ac\u7684\u7b26\u53f7\u4e32\u3002<\/p>\n

f：\u03b5->a<\/p>\n

a->[cb]<\/p>\n

c->[bc]<\/p>\n

b->$<\/p>\n

\u806a\u660e\u7684\u4f60\u4f30\u8ba1\u5df2\u7ecf\u53d1\u73b0\u95ee\u9898\u4e86，\u8fd9\u5957\u8868\u793a\u65b9\u6cd5\u597d\u50cf\u65e0\u6cd5\u8868\u793ac\u7684\u5947\u5076\u6027\u3002\u4ed6\u4f1a\u4ea7\u751f\u51faacb\u8fd9\u6837\u7684\u9519\u8bef\u5355\u8bcd\u51fa\u6765\u3002<\/p>\n

\u6240\u4ee5，\u89c4\u5219\u7684\u5de6\u8fb9\u51fa\u4e86\u95ee\u9898：\u4e0d\u5e94\u8be5\u8ba9\u7279\u5b9a\u7b26\u53f7\u51fa\u73b0\u5728\u5de6\u8fb9，\u56e0\u4e3a\u5728\u4e0d\u540c\u7684\u573a\u5408\u4e0b，\u5373\u4f7f\u662f\u76f8\u540c\u7b26\u53f7\u7684\u540e\u8ddf\u7b26\u53f7\u4e5f\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

\u90a3\u8fd9\u6837\u5427，\u6211\u4eec\u6328\u4e2a\u628a\u8fd9\u4e9b\u573a\u5408\u901a\u8fc7\u5b57\u6bcd+\u4e0b\u6807\u7684\u65b9\u5f0f\u533a\u5206，\u8fd9\u6837\u5c31\u65e2\u77e5\u9053\u5f53\u524d\u5904\u4e8e\u54ea\u4e2a\u5c0f\u5199\u7b26\u53f7，\u53c8\u77e5\u9053\u8fd9\u662f\u9488\u5bf9\u54ea\u4e2a\u7279\u6b8a\u573a\u666f\u3002\u8fd9\u6837\u6211\u4eec\u5c31\u6709：<\/p>\n

f：\u03b5->a<\/p>\n

a->[c_1b]<\/p>\n

c_1 ->c_2<\/p>\n

c_2->[c_1b]<\/p>\n

b->$<\/p>\n

\u606d\u559c\u4f60，\u53d1\u660e\u4e86\u4e00\u79cd\u63cf\u8ff0\u5355\u8bcd\u7ed3\u6784\u7684\u89c4\u5219\u3002<\/p>\n

\u5148\u4e0d\u8bba\u8fd9\u79cd\u89c4\u5219\u7684\u8868\u793a\u65b9\u6cd5\u7b26\u4e0d\u7b26\u5408\u4e3b\u6d41\u5199\u6cd5，\u6211\u8bf4\u8fd9\u79cd\u89c4\u5219\u65e0\u6b67\u4e49\u5730\u63cf\u8ff0\u4e86\u6211\u60f3\u8981\u7684\u5355\u8bcd\u7684\u7ed3\u6784，\u5e94\u8be5\u4e0d\u4f1a\u6709\u4eba\u6709\u610f\u89c1\u3002<\/p>\n

<\/h3>\n

\u7b2c\u4e94\u5f0f：\u5410\u69fd\u4e0e\u8fed\u4ee3<\/h2>\n

\u6784\u5efa\u51fa\u6765\u662f\u4e00\u56de\u4e8b，\u597d\u4e0d\u597d\u7528\u53c8\u662f\u53e6\u4e00\u56de\u4e8b\u3002\u4e0b\u9762\u5f00\u542f\u5410\u69fd\u5927\u4f1a：<\/p>\n

\u9996\u5148，\u8fd9\u4e2a\u4e0b\u6807\u7528\u8d77\u6765\u4e0d\u65b9\u4fbf（\u7528\u516c\u5f0f\u7f16\u8f91\u5668\u6253\u4e00\u4e2a\u8bd5\u8bd5），\u8fd8\u6709\u4e00\u822c\u7528\u4e0d\u5230\u7684\u83ab\u540d\u5176\u5999\u7684\u5e0c\u814a\u5b57\u6bcd\u03b5；（\u4f5c\u8005\u6ce8：\u5e0c\u814a\u5b57\u6bcd\u8fd9\u4e2a\u5c5e\u4e8e\u7ea6\u5b9a\u4fd7\u6210，\u5410\u69fd\u4f60\u4e5f\u6ca1\u529e\u6cd5\u256e(￣\u25bd￣)\u256d）<\/p>\n

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A->[a-zA-Z_]B<\/p>\n

B->[a-zA-Z_0-9]B | \u03b5；<\/p>\n

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a（\u6807\u8bc6\u7b26）：A->[a-zA-Z_]B | [a-zA-Z_]；B->[a-zA-Z_0-9]B | [a-zA-Z_0-9]
\nb（\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6574\u6570）：A->[0-9]A | [0-9]
\nc（\u5341\u516d\u8fdb\u5236\u65e0\u7b26\u53f7\u6574\u6570）：A->0B；B->xC; C->[0-9a-fA-F]C | [0-9a-fA-F]
\nd(\u6709\u7b26\u53f7\u5341\u8fdb\u5236\u6574\u6570)：S -> +A | -A | A; A->[0-9]A | [0-9]
\ne（\u5e26\u4e0b\u5212\u7ebf\u6574\u6570）：A->[0-9]B；B->[0-9]B | [0-9] | _C; C->[0-9]B | [0-9]<\/p>\n

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<\/h3>\n

\u5c0f\u7ed3<\/h2>\n

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<\/h3>\n

\u9644\u5f55：\u5728\u7ebf\u7b97\u6cd5\u4e0e\u79bb\u7ebf\u7b97\u6cd5<\/h2>\n

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