{"id":36222,"date":"2012-04-03T18:47:47","date_gmt":"2012-04-03T10:47:47","guid":{"rendered":"http:\/\/www.lanmaowang.com\/?p=36222"},"modified":"2015-04-09T00:24:44","modified_gmt":"2015-04-08T16:24:44","slug":"delphi-program-format-string","status":"publish","type":"post","link":"http:\/\/www.lanmaowang.com\/?p=36222","title":{"rendered":"delphi\u7a0b\u5e8f\u683c\u5f0f\u5316\u5b57\u7b26\u4e32"},"content":{"rendered":"<blockquote>\n<p>\n\t&nbsp; function Format(const Format: string; const Args: array of const): string;<\/p>\n<\/blockquote>\n<p>\n\t&nbsp; Format\u5b57\u7b26\u4e32\u8bf4\u660e\uff1a<br \/>\n\t&nbsp; &quot;%&quot; [index &quot;:&quot;] [&quot;-&quot;] [width] [&quot;.&quot; prec] type<br \/>\n\t&nbsp; (1) \u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5fc5\u987b\u4ee5%\u5f00\u5934<br \/>\n\t&nbsp; (2) [index &quot;:&quot;] \u7d22\u5f15\u6307\u7684\u662fArgs\u53c2\u6570\u5217\u8868\u4e2d\u8981\u663e\u793a\u7684\u6bcf\u4e00\u9879\u7684\u5e8f\u53f7\u3002\u6bd4\u5982\uff1aArgs\u662f<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&#39;a&#39;, &#39;c&#39;]\uff0c\u90a3\u4e48&#39;a&#39;\u7684\u7d22\u5f15\u5c31\u662f0\uff0c\u800c&#39;c&#39;\u7684\u7d22\u5f15\u5c31\u662f1\uff0c\u800c\u4e14\u7531\u4e8e\u53ea\u6709<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u4e24\u9879\uff0c\u6240\u4ee5\u5c31\u4e0d\u4f1a\u51fa\u73b0\u5927\u4e8e1\u7684\u7d22\u5f15\u503c\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Format(&#39;%2:s %1:s %0:s&#39;, [&#39;1st&#39;, &#39;2nd&#39;, &#39;3rd&#39;]);<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7ed3\u679c\uff1a&#39;3rd 2nd 1st&#39;<br \/>\n\t&nbsp; (3) [&quot;-&quot;] \u8fd9\u4e2a\u6807\u8bc6\u7b26\u7684\u4f5c\u7528\u662f\u5f53\u8981\u663e\u793a\u7684\u5b57\u7b26\u7684\u4e2a\u6570\u5c11\u4e8e[width]\u65f6\uff0c\u5728\u53f3\u8fb9\u586b\u8865\u7a7a\u683c\uff1b<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5982\u679c\u6ca1\u52a0\u4e0a[&quot;-&quot;]\uff0c\u5219\u5728\u5de6\u8fb9\u586b\u8865\u7a7a\u683c\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Format(&#39;(%4s)&#39;, [&#39;aa&#39;]); \u7ed3\u679c\uff1a&#39;&nbsp; aa&#39;<br \/>\n\t&nbsp; (4) [width] \u5bbd\u5ea6<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u89c4\u5b9a\u4e86\u8981\u663e\u793a\u7684\u5b57\u7b26\u7684\u4e2a\u6570\u3002\u5982\u679c\u8981\u663e\u793a\u7684\u5bbd\u5ea6\u5927\u4e8e[width]\uff0c\u5219\u6309\u5b9e\u9645\u7684<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5bbd\u5ea6\u6765\u663e\u793a\uff1b\u53cd\u4e4b\uff0c\u5219\u586b\u8865\u7a7a\u683c\u6216\u6309\u8981\u6c42\u586b\u8865\u5176\u5b83\u5b57\u7b26\u3002<br \/>\n\t&nbsp; (5) [&quot;.&quot; prec] \u7cbe\u5ea6<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u8fd9\u662f\u9488\u5bf9\u6d6e\u70b9\u6570\u6765\u8bf4\u7684\uff0c\u4e00\u822c\u5c31\u662f\u6307\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<br \/>\n\t&nbsp; (6) type \u7c7b\u578b(\u89c1\u4e0b\u9762)<\/p>\n<p>\n\t&nbsp; type\u7684\u53ef\u80fd\u503c\u6709\u4e0b\u5217\u8fd9\u4e9b\uff1a<br \/>\n\t&nbsp; (1) d \u6709\u7b26\u53f7\u5341\u8fdb\u5236\u6570<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u6709\u7b26\u53f7\u6574\u578b\u6570\u3002\u5982\u679c\u5728\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4e2d\u8fd8\u52a0\u5165\u4e86[&quot;.&quot; prec]\uff0c\u5219\u5982\u679cArgs<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7684\u957f\u5ea6\u5982\u679c\u5c0f\u4e8e\u7ed9\u51fa\u7684\u7cbe\u5ea6\u6570\u65f6\uff0c\u5728\u524d\u8fb9\u586b\u88650\uff1b\u5982\u679c\u5927\u4e8e\u7cbe\u5ea6\u6570\uff0c\u6309\u5b9e\u9645\u957f\u5ea6\u663e\u793a\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Format(&#39;(%.3d)&#39;, [99]); \u7ed3\u679c\uff1a&#39;(099)&#39;<\/p>\n<p>\n\t&nbsp; (2) u \u65e0\u7b26\u53f7\u5341\u8fdb\u5236\u6570<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u65e0\u7b26\u53f7\u6574\u578b\u6570\u3002\u5176\u5b83\u7279\u6027\u4e0ed\u4e00\u6837\u3002<\/p>\n<p>\n\t&nbsp; (3) e \u79d1\u5b66\u6280\u672f\u6cd5<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7528\u79d1\u5b66\u6280\u672f\u6cd5\u663e\u793a\u6570\u636e\uff0c\u5f62\u5f0f\u5927\u81f4\u5982\u4e0b\uff1a&#39;-d.ddd...E+ddd&#39;\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\u3002\u5982\u679c\u662f\u4e00\u4e2a\u8d1f\u6570\uff0c\u5219\u5728\u6700\u524d\u9762\u663e\u793a\u4e00\u4e2a\u7b26\u53f7\uff1b\u5728\u5c0f\u6570\u70b9\u524d\u9762<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u603b\u662f\u663e\u793a\u4e00\u4f4d\u6570\u5b57\uff1b\u5305\u62ec\u5c0f\u6570\u70b9\u524d\u9762\u7684\u6570\u5b57\u5728\u5185\uff0c\u6570\u5b57\u7684\u4e2a\u6570\u7531[&quot;.&quot; prec]\u6765\u786e\u5b9a\uff0c<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5982\u679c\u6ca1\u6709\u6307\u5b9a[&quot;.&quot; prec]\uff0c\u5219\u9ed8\u8ba4\u4e3a15\u4f4d\u7cbe\u5ea6\u3002\u5982\u679c\u5b9e\u9645\u7684\u6570\u5b57\u957f\u5ea6\u8d85\u51fa\u4e86\u6307\u5b9a\u7684<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [&quot;.&quot; prec]\uff0c\u5219\u521a\u521a\u8d85\u51fa\u7684\u90a3\u4e00\u4f4d\u6570\u5b57\u56db\u820d\u4e94\u5165\u3002\u6307\u6570\u7b26\u53f7E\u540e\u9762\u603b\u662f\u8981\u8ddf\u7740\u52a0\u53f7\u6216<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u51cf\u53f7\uff0c\u5e76\u4e14\u5728\u540e\u9762\u81f3\u5c11\u8ddf\u7740\u4e09\u4f4d\u6570\u5b57\u3002<\/p>\n<p>\n\t&nbsp; (4) f \u56fa\u5b9a\u7684<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u4e3a\u6d6e\u70b9\u6570\uff0c\u8f6c\u6362\u540e\u7684\u5f62\u5f0f\u5927\u81f4\u662f&#39;-ddd.ddd...&#39;\u8fd9\u6837\u7684\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5982\u679c\u8981\u8f6c\u6362\u7684\u662f\u8d1f\u503c\uff0c\u5219\u524d\u9762\u6709\u4e00\u4e2a\u8d1f\u53f7\u3002\u8f6c\u6362\u540e\u7684\u6570\u5b57\uff0c\u5728\u5c0f\u6570\u70b9\u540e\u9762\u7684\u6570\u5b57\u7684\u4e2a\u6570<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7531[&quot;.&quot; prec]\u51b3\u5b9a\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a[&quot;.&quot; prec]\uff0c\u9ed8\u8ba4\u4e3a2\u4f4d\u7cbe\u5ea6\u3002<\/p>\n<p>\n\t&nbsp; (5) g \u4e00\u822c\u7684<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u4e3a\u6d6e\u70b9\u6570\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u88ab\u8f6c\u6362\u540e\u7684\u6570\u5b57\u603b\u662f\u5c3d\u53ef\u80fd\u7684\u7b80\u77ed(\u6709\u53ef\u80fd\u662ff\u6216e\u5f62\u5f0f\u7684)\u3002\u6709\u91cd\u8981\u610f\u4e49\u7684\u6570\u5b57\u7684\u957f\u5ea6<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7531[&quot;.&quot; prec]\u6765\u51b3\u5b9a\uff0c\u9ed8\u8ba4\u4e3a15\u4f4d(\u5305\u62ec\u6574\u6570\u4f4d\u548c\u5c0f\u6570\u4f4d)\u3002\u6570\u5b57\u524d\u540e\u76840\u90fd\u5c06\u88ab\u53bb\u6389\uff0c<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5c0f\u6570\u70b9\u4e5f\u53ea\u6709\u5728\u5fc5\u8981\u7684\u65f6\u5019\u624d\u663e\u793a\u51fa\u6765\u3002\u5982\u679c\u5c0f\u6570\u70b9\u5de6\u8fb9\u7684\u6570\u5b57\u5c0f\u4e8e\u7b49\u4e8e\u6307\u5b9a\u7684\u7cbe\u5ea6\uff0c<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5e76\u4e14\u6574\u4e2a\u503c\u5927\u4e8e\u6216\u7b49\u4e8e0.00001\u7684\u65f6\u5019\uff0c\u624d\u4f7f\u7528f\u7684\u663e\u793a\u683c\u5f0f\uff0c\u5426\u5219\u4f7f\u7528e(\u79d1\u5b66\u6280\u672f\u6cd5)<\/p>\n<p>\n\t&nbsp; (6) n Args\u5fc5\u987b\u662f\u6d6e\u70b9\u6570\u3002\u5f62\u5f0f\u548cf\u662f\u4e00\u6837\u7684\uff0c\u4e0d\u540c\u7684\u662f\u4f1a\u663e\u793a\u5343\u4f4d\u7b26\uff0c\u5982\uff1a1,123,444<\/p>\n<p>\n\t&nbsp; (7) m \u8d27\u5e01\u7c7b\u578b<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u6d6e\u70b9\u6570\u3002\u80fd\u591f\u663e\u793a\u8d27\u5e01\u7b26\u53f7\uff0c\u53ef\u4ee5\u901a\u8fc7&amp;ldquo;\u63a7\u5236\u9762\u677f&amp;rdquo;\u6765\u8bbe\u7f6e\u3002\u5c0f\u6570\u70b9\u540e<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7684\u4f4d\u6570\u7531[&quot;.&quot; prec]\u51b3\u5b9a\uff0c\u5982\u679c\u6ca1\u7528[&quot;.&quot; prec]\uff0c\u5219\u9ed8\u8ba42\u4f4d\u3002<\/p>\n<p>\n\t&nbsp; (8) p \u6307\u9488<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u4e00\u4e2a\u6307\u9488\u503c\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5c06\u6307\u9488\u8f6c\u6362\u4e3a8\u4e2a\u5b57\u7b26\u7684\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\n\t&nbsp; (9) s \u5b57\u7b26\u4e32<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u5b57\u7b26\uff0c\u5b57\u7b26\u4e32\u6216PChar\u503c\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5982\u679c\u6307\u5b9a\u4e86[&quot;.&quot; prec]\uff0c\u5e76\u4e14\u5b57\u7b26\u4e32\u7684\u5b9e\u9645\u957f\u5ea6\u5927\u4e8e[&quot;.&quot; prec]\uff0c\u5219\u4ece\u5de6\u5230\u53f3\u622a\u53d6<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7cbe\u5ea6\u6307\u5b9a\u6570\u91cf\u7684\u5b57\u7b26\u4e32\uff0c\u5176\u4f59\u7684\u5220\u9664\u3002<\/p>\n<p>\n\t&nbsp; (10) x \u5341\u516d\u8fdb\u5236<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Args\u5fc5\u987b\u662f\u4e00\u4e2a\u6574\u578b\u6570\u3002<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u5982\u679c\u4f7f\u7528\u4e86[&quot;.&quot; prec]\uff0c\u4e0d\u8db3\u90e8\u5206\u8981\u75280\u8865\u9f50\u3002<\/p>\n<p>\n\t&nbsp; \u6ce8\u610f\uff1a[index &quot;:&quot;] [width] [&quot;.&quot; prec]\u53ef\u4ee5\u4f7f\u7528\u8fd9\u6837\u7684\u683c\u5f0f\uff1a<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Format(&#39;%*.*f&#39;, [8, 2, 123.456])<br \/>\n\t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7b49\u4ef7\u4e8e\uff1aFormat(&#39;%8.2f&#39;, [123.456]).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; function Format(const Format: string; const Args [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":36149,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[193],"tags":[198,218,217],"_links":{"self":[{"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/posts\/36222"}],"collection":[{"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=36222"}],"version-history":[{"count":2,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/posts\/36222\/revisions"}],"predecessor-version":[{"id":36319,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/posts\/36222\/revisions\/36319"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=\/wp\/v2\/media\/36149"}],"wp:attachment":[{"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36222"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.lanmaowang.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}