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16-Bit Language Tools Libraries
isspace (Continued)
Output:
& is NOT a white-space character
a tab is a white-space character
isupper
Description:
Include:
Prototype:
Test for an upper case letter.
<ctype.h>
int isupper (int c );
Argument:
c
character to test
Return Value:
Remarks:
Example:
Returns a non-zero integer value if the character is an upper case
alphabetic character; otherwise, returns zero.
A character is considered to be an upper case alphabetic character if it
is in the range of ‘A’-‘Z’.
#include <ctype.h> /* for isupper */
#include <stdio.h> /* for printf */
int main(void)
{
int ch;
ch = 'B';
if (isupper(ch))
printf("B is upper case\n");
else
printf("B is NOT upper case\n");
ch = 'b';
if (isupper(ch))
printf("b is upper case\n");
else
printf("b is NOT upper case\n");
}
Output:
B is upper case
b is NOT upper case
isxdigit
Description:
Include:
Prototype:
Test for a hexadecimal digit.
<ctype.h>
int isxdigit (int c );
Argument:
c
character to test
DS51456E-page 20
Return Value:
Remarks:
Returns a non-zero integer value if the character is a hexadecimal digit;
otherwise, returns zero.
A character is considered to be a hexadecimal digit character if it is in
the range of ‘0’-‘9’, ‘A’-‘F’, or ‘a’-‘f’. Note: The list does not include the
leading 0x because 0x is the prefix for a hexadecimal number but is not
an actual hexadecimal digit.
? 2008 Microchip Technology Inc.
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相关PDF资料
SW006015
C COMPILER MPLAB C32
SW300003-EVAL
LIBRARY SOFT MODEM-EVAL ONLY
SW300010-EVAL
SPEECH RECOG LIBRARY-EVAL ONLY
SW300040-EVAL
LIBRARY NOISE SUPPR-EVAL ONLY
SW300060-EVAL
LIBRARY ACOUSTIC ECHO-EVAL ONLY
SW300070-EVAL
SOFTWARE LIBR ENC/DEC EVAL ONLY
SW500012
HI-TECH C PRO FOR PIC32
SY87701LHI-EVAL
BOARD EVAL SY87701 EXPERIMENT
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