{"id":91,"date":"2026-03-15T14:27:25","date_gmt":"2026-03-15T06:27:25","guid":{"rendered":"https:\/\/www.caldm.cn\/?p=91"},"modified":"2026-03-15T14:31:50","modified_gmt":"2026-03-15T06:31:50","slug":"ctype-h%e7%b3%bb%e5%88%97%e7%9a%84%e5%ad%97%e7%ac%a6%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.caldm.cn\/index.php\/2026\/03\/15\/ctype-h%e7%b3%bb%e5%88%97%e7%9a%84%e5%ad%97%e7%ac%a6%e5%87%bd%e6%95%b0\/","title":{"rendered":"ctype.h\u7cfb\u5217\u7684\u5b57\u7b26\u51fd\u6570"},"content":{"rendered":"\n

ctype.h<\/code>\u5934\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u6d4b\u8bd5\u51fd\u6570<\/h2>\n\n\n\n
\u51fd\u6570\u540d<\/th>\u5982\u679c\u662f\u4e0b\u5217\u53c2\u6570\u65f6\uff0c\u8fd4\u56de\u503c\u4e3a\u771f<\/th><\/tr><\/thead>
isalnum()<\/code><\/td>\u5b57\u6bcd\u6570\u5b57\uff08\u5b57\u6bcd\u6216\u6570\u5b57\uff09<\/td><\/tr>
isalpha()<\/code><\/td>\u5b57\u6bcd<\/td><\/tr>
isblank()<\/code><\/td>\u6807\u51c6\u7684\u7a7a\u767d\u5b57\u7b26\uff08\u7a7a\u683c\u3001\u6c34\u5e73\u5236\u8868\u7b26\u6216\u6362\u884c\u7b26\uff09\u6216\u4efb\u4f55\u5176\u4ed6\u672c\u5730\u5316\u6307\u5b9a\u4e3a\u7a7a\u767d\u7684\u5b57\u7b26<\/td><\/tr>
iscntrl()<\/code><\/td>\u63a7\u5236\u5b57\u7b26\uff0c\u5982Ctrl+B<\/code><\/td><\/tr>
isdigit()<\/code><\/td>\u6570\u5b57<\/td><\/tr>
isgraph()<\/code><\/td>\u9664\u7a7a\u683c\u4e4b\u5916\u7684\u4efb\u610f\u53ef\u6253\u5370\u5b57\u7b26<\/td><\/tr>
islower()<\/code><\/td>\u5c0f\u5199\u5b57\u6bcd<\/td><\/tr>
isprint()<\/code><\/td>\u53ef\u6253\u5370\u5b57\u7b26<\/td><\/tr>
ispunct()<\/code><\/td>\u6807\u70b9\u7b26\u53f7\uff08\u9664\u7a7a\u683c\u6216\u5b57\u6bcd\u6570\u5b57\u5b57\u7b26\u4ee5\u5916\u7684\u4efb\u4f55\u53ef\u6253\u5370\u5b57\u7b26\uff09<\/td><\/tr>
isspace()<\/code><\/td>\u7a7a\u767d\u5b57\u7b26\uff08\u7a7a\u683c\u3001\u6362\u884c\u7b26\u3001\u6362\u9875\u7b26\u3001\u56de\u8f66\u7b26\u3001\u5782\u76f4\u5236\u8868\u7b26\u3001\u6c34\u5e73\u5236\u8868\u7b26\u6216\u5176\u4ed6\u672c\u5730\u5316\u5b9a\u4e49\u7684\u5b57\u7b26\uff09<\/td><\/tr>
isupper()<\/code><\/td>\u5927\u5199\u5b57\u6bcd<\/td><\/tr>
isxdigit()<\/code><\/td>\u5341\u516d\u8fdb\u5236\u6570\u5b57\u7b26<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

ctype.h<\/code>\u5934\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u6620\u5c04\u51fd\u6570<\/h2>\n\n\n\n
\u51fd\u6570\u540d<\/th>\u884c\u4e3a<\/th><\/tr><\/thead>
tolower()<\/code><\/td>\u5982\u679c\u53c2\u6570\u662f\u5927\u5199\u5b57\u7b26\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u5c0f\u5199\u5b57\u7b26<\/strong>\uff1b\u5426\u5219\uff0c\u8fd4\u56de\u539f\u59cb\u53c2\u6570<\/td><\/tr>
toupper()<\/code><\/td>\u5982\u679c\u53c2\u6570\u662f\u5927\u5199\u5b57\u7b26\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u5927\u5199\u5b57\u7b26<\/strong>\uff1b\u5426\u5219\uff0c\u8fd4\u56de\u539f\u59cb\u53c2\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

ctype.h\u5934\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u6d4b\u8bd5\u51fd\u6570 \u51fd\u6570\u540d \u5982\u679c\u662f\u4e0b\u5217\u53c2\u6570\u65f6\uff0c\u8fd4\u56de\u503c\u4e3a\u771f isalnum() \u5b57\u6bcd\u6570\u5b57\uff08\u5b57\u6bcd […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,20],"tags":[11],"class_list":["post-91","post","type-post","status-publish","format-standard","hentry","category-c-2","category-20","tag-c-2"],"_links":{"self":[{"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/posts\/91","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/comments?post=91"}],"version-history":[{"count":2,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/posts\/91\/revisions"}],"predecessor-version":[{"id":93,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/posts\/91\/revisions\/93"}],"wp:attachment":[{"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/media?parent=91"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/categories?post=91"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.caldm.cn\/index.php\/wp-json\/wp\/v2\/tags?post=91"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}