Use of strtok Functions

Go to strtok:

Usage: token = strtok (source-STR, seperator-Str)
Purpose: in source-STR, find the character string separated by the characters in seperator-STR, that is, the string of the remaining segments after the source string contains all the characters in the separator string, each call finds a string. If no string is found, an empty string is returned.
Note: The Return Value refers to the pointer to the source string, so the validity of the source string must also be ensured, each time a substring is returned, the tail character (originally a character in the search string) of the substring in the source string is changed to the '/0' character. Another thing to note is that this function uses a Global static buffer (the function's own static buffer), so do not call this function to process two strings at the same time in a thread, otherwise, it is easy to see abnormal results. The correct solution is to first find all the substrings in a string and then convert them to another string. This interference does not occur between multiple threads.
The following is an example in msdn:
Data preparation:
Char string [] = "A String/TOF, tokens/NAND some more tokens ";
Char SEPs [] = ",/T/N ";
Char * token;
Call example:
Token = strtok (string, SEPs );
While (Token! = NULL)
{
/* While there are tokens in "string "*/
Printf ("% s/n", token );
/* Get next token :*/
Token = strtok (null, SEPs );
/* Note that the above null indicates that the remaining substring is retrieved from the buffer zone of strtok In the last call result */
}
Display result:
A // string [1] = '/0' at this time, which is originally a space
String
Of
Tokens
And
Some
More
Tokens

 

 

Experiment Program:

# Include <stdio. h>
# Include <string. h>
# Include <stdlib. h>
Int main ()
{
Char string [] = "a string of, tokens % and some more tokens ";
Char SEPs [] = "%/N ";
Char * token;
Token = strtok (string, SEPs );
While (Token! = NULL)
{
Printf ("% s/n", token );
Token = strtok (null, SEPs );
}
Return 0;
}