C program to split the string using strtok_r() function

Here, we are going to learn how to split string using strtok_r() function in C programming language?
Submitted by Nidhi, on July 21, 2021

Problem Solution:

In this program, we will use strtok_r() function. This function is used to split the string and get words from a specified string based on a specified delimiter.

The strtok_r() works similar to the strtok() function. But strtok_r() is a re-entrant function.


The source code to split the string using the strtok_r() function is given below. The given program is compiled and executed using GCC compile on UBUNTU 18.04 OS successfully.

// C program to split the string
// using strtok_r() function

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

int main()
    char str[32] = "www.includehelp.com";
    char* word;
    char delim[2] = ".";

    char* ptr = str;

    while ((word = strtok_r(ptr, delim, &ptr)))
        printf("%s\n", word);

    return 0;




In the main() function, we created a string str initialized with "www.includehelp.com". Then we split the string based on dot (.) delimiter using strtok_r() function and printed the words on the console screen.

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