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Standard C Libraries
strcspn (Continued)
Explanation:
In the first result, e is in s2 so it stops counting after h .
In the second result, a is in s2 .
In the third result, none of the characters of s1 are in s2 so all charac-
ters are counted.
strerror
Description:
Include:
Prototype:
Gets an internal error message.
<string.h>
char *strerror(int errcode );
Argument:
errcode
number of the error code
Return Value:
Remarks:
Returns a pointer to an internal error message string corresponding to
the specified error code errcode .
The array pointed to by strerror may be overwritten by a subse-
quent call to this function.
Example:
#include <stdio.h>
/*
for fopen, fclose,
*/
/*
#include <string.h> /*
#include <errno.h> /*
printf, FILE, NULL
for strerror
for errno
*/
*/
*/
int main(void)
{
FILE *myfile;
if ((myfile = fopen("samp.fil", "r+")) == NULL)
printf("Cannot open samp.fil: %s\n",
strerror(errno));
else
printf("Success opening samp.fil\n");
fclose(myfile);
}
Output:
Cannot open samp.fil: file open error
strlen
Description:
Include:
Prototype:
Finds the length of a string.
<string.h>
size_t strlen(const char * s );
Argument:
s
the string
Return Value:
Remarks:
? 2008 Microchip Technology Inc.
Returns the length of a string.
This function determines the length of the string, not including the ter-
minating null character.
DS51456E-page 125
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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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