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	Turbo C 2.0 º¯ÊýÖÐÎÄ˵Ã÷´óÈ«
·ÖÀຯÊý,ËùÔÚº¯Êý¿âΪctype.h 
int isalpha(int ch) ÈôchÊÇ×Öĸ('A'-'Z','a'-'z')·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isalnum(int ch) ÈôchÊÇ×Öĸ('A'-'Z','a'-'z')»òÊý×Ö('0'-'9'),·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isascii(int ch) ÈôchÊÇ×Ö·û(ASCIIÂëÖеÄ0-127)·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int iscntrl(int ch) ÈôchÊÇ×÷·Ï×Ö·û(0x7F)»òÆÕͨ¿ØÖÆ×Ö·û(0x00-0x1F),·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isdigit(int ch) ÈôchÊÇÊý×Ö('0'-'9')·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isgraph(int ch) ÈôchÊǿɴòÓ¡×Ö·û(²»º¬¿Õ¸ñ)(0x21-0x7E)·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int islower(int ch) ÈôchÊÇСд×Öĸ('a'-'z')·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isprint(int ch) ÈôchÊǿɴòÓ¡×Ö·û(º¬¿Õ¸ñ)(0x20-0x7E)·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int ispunct(int ch) ÈôchÊDZêµã×Ö·û(0x00-0x1F)·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isspace(int ch) ÈôchÊǿոñ(' '),Ë®Æ½ÖÆ±í·û('\t'),»Ø³µ·û('\r'), ×ßÖ½»»ÐÐ('\f'),´¹Ö±ÖƱí·û('\v'),»»Ðзû('\n'), ·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isupper(int ch) ÈôchÊÇ´óд×Öĸ('A'-'Z')·µ»Ø·Ç0Öµ,·ñÔò·µ»Ø0 
int isxdigit(int ch) ÈôchÊÇ16½øÖÆÊý('0'-'9','A'-'F','a'-'f')·µ»Ø·Ç0Öµ, ·ñÔò·µ»Ø0 
int tolower(int ch) ÈôchÊÇ´óд×Öĸ('A'-'Z')·µ»ØÏàÓ¦µÄСд×Öĸ('a'-'z') 
int toupper(int ch) ÈôchÊÇСд×Öĸ('a'-'z')·µ»ØÏàÓ¦µÄ´óд×Öĸ('A'-'Z')
Êýѧº¯Êý,ËùÔÚº¯Êý¿âΪmath.h¡¢stdlib.h¡¢string.h¡¢float.h 
int abs(int i) ·µ»ØÕûÐͲÎÊýiµÄ¾ø¶ÔÖµ 
double cabs(struct complex znum) ·µ»Ø¸´ÊýznumµÄ¾ø¶ÔÖµ 
double fabs(double x) ·µ»ØË«¾«¶È²ÎÊýxµÄ¾ø¶ÔÖµ 
long labs(long n) ·µ»Ø³¤ÕûÐͲÎÊýnµÄ¾ø¶ÔÖµ 
double exp(double x) ·µ»ØÖ¸Êýº¯ÊýexµÄÖµ 
double frexp(double value,int *eptr) ·µ»Øvalue=x*2nÖÐxµÄÖµ,n´æÖüÔÚeptrÖÐ 
double ldexp(double value,int exp); ·µ»Øvalue*2expµÄÖµ 
double log(double x) ·µ»ØlogexµÄÖµ 
double log10(double x) ·µ»Ølog10xµÄÖµ 
double pow(double x,double y) ·µ»ØxyµÄÖµ 
double pow10(int p) ·µ»Ø10pµÄÖµ 
double sqrt(double x) ·µ»ØxµÄ¿ª·½ 
double acos(double x) ·µ»ØxµÄ·´ÓàÏÒcos-1(x)Öµ,xΪ»¡¶È 
double asin(double x) ·µ»ØxµÄ·´ÕýÏÒsin-1(x)Öµ,xΪ»¡¶È 
double atan(double x) ·µ»ØxµÄ·´ÕýÇÐtan-1(x)Öµ,xΪ»¡¶È 
double atan2(double y,double x) ·µ»Øy/xµÄ·´ÕýÇÐtan-1(x)Öµ,yµÄxΪ»¡¶È 
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