C语言函数描述

\r}\rfgF is an uppercase character\rD is an uppercase character\rP is an uppercase character\risxdigit ("Di,!16‘ ")\r0j< isalnum, isdigit\rklGm #include<ctype. h>\r78< int isxdigit (int c).\r< 34no C i,!16‘ "%ÃÄc !ÅÀ§ Æ\rDz³&TRUE. 16‘ ":0123456789ABCDEF\r c ! 16‘ "%&TRUE,,&\rNULL(0)o\r12345!678%9:;< \r=>/*AB"DEstr !ÉÊ‘ "H"D*/\rttinclude <ctype. h>\rmain()\r(\rchar str[]="123c@#FDsP[e?”;\rint i;\rfor(i=0;str[i]!=0;i++)\rif (isxdigit(str[i])) printf (z%%c is a hexadecimal\rdigits'n”, str[i]);\r}\rfg 1 is a hexadecimal digits\r2 is a hexadecimal digits\r3 is a hexadecimal digits\rc is a hexadecimal digits\rF is a hexadecimal digits\rD is a hexadecimal digits\re is a hexadecimal digits