C library function - strtok()

Description

The C library function char *strtok(char *str, const char *delim) breaks string str into a series of tokens using the delimitrer delim.

Declaration

Following is the declaration for strtok() function.

char *strtok(char *str, const char *delim)

Parameters

• str -- The contents of this string are modified and broken into smaller strings (tokens).

• delim -- This is the C string containing the delimiters. These may vary from one call to another.

Return Value

This function returns a pointer to the last token found in string. A null pointer is returned if there are no tokens left to retrieve.

Example

The following example shows the usage of strtok() function.

#include <string.h>
#include <stdio.h>

int main()
{
   const char str[80] = "This is - www.tutorialspoint.com - website";
   const char s[2] = "-";
   char *token;
   
   /* get the first token */
   token = strtok(str, s);
   
   /* walk through other tokens */
   while( token != NULL ) 
   {
      printf( " %s\n", token );
    
      token = strtok(NULL, s);
   }
   
   return(0);
}

Let us compile and run the above program, this will produce the following result:

This is 
www.tutorialspoint.com 
website