http://css3.sinriv.com/ 2026-06-03T05:35:43+0800 http://css3.sinriv.com/ http://css3.sinriv.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2019-09-04T17:21:07+0800 Anonymous (anonymous@undisclosed.example.com) http://css3.sinriv.com/%E7%BC%96%E7%A8%8B:%E7%AE%97%E6%B3%95:char%E8%BD%AC%E5%8D%81%E5%85%AD%E8%BF%9B%E5%88%B6%E5%AD%97%E7%AC%A6%E4%B8%B2?rev=1567588867 char转十六进制字符串 const static char mapping[] = "0123456789ABCDEF"; char buf[4]; unsigned char low = c & 0x0f;//低4位 unsigned char hei = (c >> 4) & 0x0f;//高4位 buf[0]='%';//前缀 buf[1]=mapping[hei]; buf[2]=mapping[low]; buf[3]='\0';