strsep使用范例

#include <stdio.h>

#include <string.h>

int

main()

{

char

string[] =

"A B C"

;

char

*stringp = string;

char

*delim =

" "

;

char

*token;

while

(stringp != NULL) {

token =strsep(&stringp, delim);

puts

(token);

}

return

0;

}

A

B

C

extract tokens from string   return
program.c   copy
?
12345678910111213141516171819202122232425262728293031323334353637383940
#include <stdio.h>
#include <string.h>
 
void
 
dump_stringp(
char
 
*string,
char
 
*stringp)
{
}
 
int
 
main()
{
char
 
string[] =
"A B C"
;
char
 
*stringp = string;
const
 
char
 
*delim =
" "
;
char
 
*token;
 
// stringp is updated to point to the next token 'B'
token =strsep(&stringp, delim);
printf
(
"token ='%s', "
, token);
if
 
(stringp == NULL)
printf
(
"stringp == NULL\n"
);
else
printf
(
"stringp - string = %d\n"
, stringp - string);
 
// stringp is updated to point to the next token 'C'
token =strsep(&stringp, delim);
printf
(
"token ='%s', "
, token);
if
 
(stringp == NULL)
printf
(
"stringp == NULL\n"
);
else
printf
(
"stringp - string = %d\n"
, stringp - string);
 
// In case no delimiter was found, stringp is made NULL.
token =strsep(&stringp, delim);
printf
(
"token ='%s', "
, token);
if
 
(stringp == NULL)
printf
(
"stringp = NULL\n"
);
else
printf
(
"stringp - string = %d\n"
, stringp - string);
 
return
 
0;
}
Output
?
123
token =
'A'
, stringp - string = 2
token =
'B'
, stringp - string = 4
token =
'C'
, stringp = NULL