Split string into tokens and save them in an array

Question

How to split a string into an tokens and then save them in an array   Specifically  I have a string  abc qwe jkh   I want to separate      and then save the tokens into an array   Output will be such that  array 0     abc  array 1     qwe  array 2     jkh    please help me

User · Answer

You can use strtok    char string      abc qwe jkh   char  array 10   int i 0   array i    strtok string        while array i   NULL       array   i    strtok NULL

User · Answer

Why strtok   is a bad idea Do not use strtok   in normal code  strtok   uses static variables which have some problems  There are some use cases on embedded microcontrollers where static variables make sense but avoid them in most other cases  strtok   behaves unexpected when more than 1 thread uses it  when it is used in a interrupt or when there are some other circumstances where more than one input is processed between successive calls to strtok    Consider this example   include  lt stdio h gt   include  lt string h gt     Splits the input by the   character and prints the content in between   the   character  The input string will be changed void printContent char  input        char  p   strtok input   quot   quot        while p                printf  quot  s   quot  p           p   strtok NULL   quot   quot             int main void        char buffer      quot abc def ghi ABC DEF GHI quot       char  p   strtok buffer   quot   quot        while p                printContent p           puts  quot  quot      print newline         p   strtok NULL   quot   quot              return 0     You may expect the output  abc  def  ghi  ABC  DEF  GHI   But you will get abc  def  ghi   This is because you call strtok   in printContent   resting the internal state of strtok   generated in main    After returning  the content of strtok   is empty and the next call to strtok   returns NULL  What you should do instead You could use strtok r   when you use a POSIX system  this versions does not need static variables  If your library does not provide strtok r   you can write your own version of it  This should not be hard and Stackoverflow is not a coding service  you can write it on your own

User · Answer

include  lt stdio h gt   include  lt string h gt   int main          char buf     abc qwe ccd       int i   0      char  p   strtok  buf            char  array 3        while  p    NULL                array i      p          p   strtok  NULL                   for  i   0  i  lt  3    i           printf   s n   array i         return 0

[c] Split string into tokens and save them in an array

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