\u4e3b\u9875<\/a> > \u62a5\u544a\u4e2d\u5fc3<\/a> > \u63a7\u5236\u62a5\u544a\u6570\u636e<\/a><\/p>\n \u9ad8\u7ea7\u8fc7\u6ee4\u5668 \u4f7f\u7528\u9ad8\u7ea7\u8fc7\u6ee4\u5668 \u6216 \u4f5c\u4e3a\u4ee5\u4e0a\u6240\u6709\u6587\u5b57\u5b57\u7b26\u7684\u8f6c\u4e49\u5b57\u7b26 \u4e3b\u9875 > \u62a5\u544a\u4e2d\u5fc3 > \u63a7\u5236\u62a5\u544a\u6570\u636e \u9ad8\u7ea7\u8fc7\u6ee4\u5668\u901a\u8fc7\u9ad8\u7ea7\u8fc7\u6ee4\u5668\u9009\u9879\uff0c\u60a8\u53ef\u4ee5\u5229\u7528\u4e00\u3001\u4e24\u4e2a\u73b0\u6709\u5b57\u6bb5\u6784\u5efa\u62a5\u544a\u533a\u57df\u3002P … \u7ee7\u7eed\u9605\u8bfb\u9ad8\u7ea7\u8fc7\u6ee4\u5668 – Google \u5206\u6790 \u5e2e\u52a9\u4e2d\u5fc3<\/span>
\u901a\u8fc7\u9ad8\u7ea7\u8fc7\u6ee4\u5668\u9009\u9879\uff0c\u60a8\u53ef\u4ee5\u5229\u7528\u4e00\u3001\u4e24\u4e2a\u73b0\u6709\u5b57\u6bb5\u6784\u5efa\u62a5\u544a\u533a\u57df\u3002POSIX \u6b63\u5219\u8868\u8fbe\u5f0f<\/a>\u548c\u76f8\u5e94\u7684\u53d8\u91cf\u53ef\u7528\u4e8e\u83b7\u53d6\u5168\u90e8\u6216\u90e8\u5206\u5b57\u6bb5\uff0c\u5e76\u6309\u60a8\u5e0c\u671b\u7684\u987a\u5e8f\u7ec4\u5408\u7ed3\u679c\u3002\u8981\u4e86\u89e3\u6709\u5173”\u8fc7\u6ee4”\u5de5\u4f5c\u539f\u7406\u7684\u4e00\u822c\u4fe1\u606f\u5e76\u83b7\u5f97\u8bf4\u660e\u6bcf\u4e2a\u8fc7\u6ee4\u5b57\u6bb5\u4f5c\u7528\u7684\u5217\u8868\uff0c\u8bf7\u53c2\u9605\u672c\u8282\u8d77\u59cb\u90e8\u5206\u7684\u6587\u7ae0\uff1a\u8fc7\u6ee4\u6982\u8ff0<\/a>\u548c\u8fc7\u6ee4\u5b57\u6bb5<\/a>\u3002<\/p>\n
\u9ad8\u7ea7\u8fc7\u6ee4\u5668\u5229\u7528\u6700\u591a\u4e24\u4e2a\u5b57\u6bb5\uff08\u5b57\u6bb5 A \u548c \u5b57\u6bb5 B\uff09\u6765\u6784\u5efa\u8f93\u51fa\u5b57\u6bb5\u3002\u6458\u5f55 A \u8868\u8fbe\u5f0f\u7528\u4e8e\u5b57\u6bb5 A\uff0c\u6458\u5f55 B \u8868\u8fbe\u5f0f\u7528\u4e8e\u5b57\u6bb5 B\u3002\u8fd9\u4e9b\u8868\u8fbe\u5f0f\u53ef\u4f7f\u7528\u5b8c\u6574\u6216\u90e8\u5206\u6587\u5b57\u5339\u914d\uff0c\u8fd8\u53ef\u5305\u62ec\u901a\u914d\u7b26\u3002\u4ee5\u4e0b\u662f\u5e38\u89c1\u901a\u914d\u7b26\u53ca\u5176\u542b\u4e49\u5217\u8868\u3002\u8fd9\u4e9b\u8868\u8fbe\u5f0f\u7b26\u5408 POSIX \u6b63\u5219\u8868\u8fbe\u5f0f\u3002
\u901a\u914d\u7b26
\u542b\u4e49
.
\u5339\u914d\u6240\u6709\u5355\u4e2a\u5b57\u7b26
*
\u5339\u914d\u4ee5\u524d\u7684 0 \u4e2a\u6216\u591a\u4e2a\u9879\u76ee
+
\u5339\u914d\u4ee5\u524d\u7684 1 \u4e2a\u6216\u591a\u4e2a\u9879\u76ee
?
\u5339\u914d\u4ee5\u524d\u7684 0 \u4e2a\u6216 1 \u4e2a\u9879\u76ee
()
\u5c06\u62ec\u53f7\u4e2d\u7684\u5185\u5bb9\u8bb0\u5fc6\u4e3a\u9879\u76ee
[]
\u5339\u914d\u6b64\u5217\u8868\u4e2d\u7684 1 \u4e2a\u9879\u76ee
–
\u5728\u5217\u8868\u4e2d\u521b\u5efa\u8303\u56f4<\/p>\n
^
\u5339\u914d\u5230\u5b57\u6bb5\u5f00\u5934\u5904
$
\u5339\u914d\u5230\u5b57\u6bb5\u7ed3\u5c3e\u5904<\/p>\n
\u7528\u62ec\u53f7 () \u53ef\u83b7\u53d6\u5b57\u6bb5\u7684\u5404\u4e2a\u90e8\u5206\uff0c\u800c\u8fd9\u4e9b\u5185\u5bb9\u53c8\u53ef\u4ee5\u4f7f\u7528 $A1\u3001$A2\u3001$B1\u3001$B2 \u7b26\u53f7\u5728\u6784\u9020\u5668\u4e2d\u5f15\u7528\u3002$A \u6216 $B \u6307\u793a\u5b57\u6bb5\uff0c\u6570\u5b57\u6307\u793a\u5f15\u7528\u54ea\u4e2a\u62ec\u53f7\u3002\u5728\u4e0a\u4f8b\u4e2d\uff0c\u6574\u4e2a\u5b57\u6bb5 A \u548c\u6574\u4e2a\u5b57\u6bb5 B \u88ab\u83b7\u53d6\u5e76\u7ec4\u6210\u65b0\u7684\u5b57\u6bb5\u3002\u8f93\u51fa\u81f3\u5b57\u6bb5\u53ef\u4ee5\u662f\u5355\u72ec\u7684\u5b57\u6bb5\uff0c\u4e5f\u53ef\u4ee5\u4e0e\u5b57\u6bb5 A \u6216\u5b57\u6bb5 B \u76f8\u540c\u3002
\u63a7\u5236
\u5229\u7528\u8986\u76d6\u8f93\u51fa\u5b57\u6bb5\u5355\u9009\u6309\u94ae\uff0c\u53ef\u4ee5\u51b3\u5b9a\u5728\u8f93\u51fa\u81f3\u5b57\u6bb5\u5df2\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\u5982\u4f55\u64cd\u4f5c\u3002\u5229\u7528\u5fc5\u586b\u5b57\u6bb5 x \u9009\u9879\uff0c\u53ef\u4ee5\u51b3\u5b9a\u5728\u67d0\u8868\u8fbe\u5f0f\u4e0d\u5339\u914d\u65f6\u5982\u4f55\u64cd\u4f5c\u3002\u6700\u540e\uff0c\u533a\u5206\u5927\u5c0f\u5199\u6307\u793a\u6570\u636e\u662f\u5426\u5fc5\u987b\u4e0e\u5b57\u7b26\u4e32\u5927\u5c0f\u5199\u7cbe\u786e\u5339\u914d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"