[C] Extract tokens from strings

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

int
main(int argc, char *argv[])
{
    char *str1, *str2, *token, *subtoken;
    char *saveptr1 = NULL, *saveptr2 = NULL;
    int j;

   if (argc != 4) {
        fprintf(stderr, "Usage: %s string delim subdelim\n",
                argv[0]);
        exit(EXIT_FAILURE);
    }   

   for (j = 1, str1 = argv[1]; ; j++, str1 = NULL) {
        printf("saveptr1 = %s \n",saveptr1);
        token = strtok_r(str1, argv[2], &saveptr1);
        printf("str1 = %s, argv[2] = %s, saveptr1 = %s \n",str1, argv[2], saveptr1);
        printf("token = %s \n",token);
        if (token == NULL)
            break;
        printf("%d: %s\n", j, token);

       for (str2 = token; ; str2 = NULL) {
            subtoken = strtok_r(str2, argv[3], &saveptr2);
            if (subtoken == NULL)
                break;
            printf(" --> %s\n", subtoken);
        }
    }   

   exit(EXIT_SUCCESS);
}

Execute code :

./a.out 'a/bbb///cc;xxx:yyy:' ':;' '/'
saveptr1 = (null) 
str1 = a/bbb///cc, argv[2] = :;, saveptr1 = xxx:yyy: 
token = a/bbb///cc 
1: a/bbb///cc
 --> a
 --> bbb
 --> cc
saveptr1 = xxx:yyy: 
str1 = (null), argv[2] = :;, saveptr1 = yyy: 
token = xxx 
2: xxx
 --> xxx
saveptr1 = yyy: 
str1 = (null), argv[2] = :;, saveptr1 =  
token = yyy 
3: yyy
 --> yyy
saveptr1 =  
str1 = (null), argv[2] = :;, saveptr1 =  
token = (null) 

Reference:
strtok_r(3) - Linux man page