strtok

The prototype described in the header file string.h :

  char * strtok ( char * string , const char * delim );

• string - a pointer to a string to be divided into tokens. After the call, the line changes. For a subsequent call, you can pass NULL , then the function will continue to search in the original string.
• delim is a pointer to a string containing delimiters.

The function returns a pointer to the first token found in the string. If no tokens are found, then a null pointer is returned.

Connection

C

  #include <string.h> 

C ++

  #include <cstring> 

Usage Example

  #include <stdio.h> 
 #include <string.h> 
 
 int main ()
 {
   char str [] = "This is not a bug, this is a feature."  ;
   printf ( "Split the string \" % s \ " into tokens." , str );
   char * pch = strtok ( str , ",." );  // in the second parameter, delimiters are specified (space, comma, period)
   printf ( " \ n Tokens:" );
   while ( pch ! = NULL ) // while there are tokens
   {
       printf ( " \ n % s" , pch );
       pch = strtok ( NULL , ",." );
   }
   return 0 ;
 }

Conclusion:

  Split the line "This is not a bug, this is a feature."  tokens.
 Tokens:
 it
 not
 bug
 this
 feature

The strtok function strtok not reentrant . There are two thread-safe, non-standard functions - strtok_s (in VC ++) and strtok_r (in the POSIX standard).

• C ++ reference: strtok (English) - description of strtok with an example.