NMEA SAMPLE

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

char *strtok_fr (char *s, char delim, char **save_ptr)
{
    char *tail;
    char c;

    if (s == NULL) {
        s = *save_ptr;
    }
    tail = s;
    if ((c = *tail) == '\0') {
        s = NULL;
    }
    else {
        do {
            if (c == delim) {
                *tail++ = '\0';
                break;
           }
        }while ((c = *++tail) != '\0');
    }
    *save_ptr = tail;
    return s;
}

char *strtok_f (char *s, char delim)
{
    static char *save_ptr;

    return strtok_fr (s, delim, &save_ptr);
}

int main() {
   int counter = 0;
   char string[100] = "1,1,20200921214503.000,43.324205,11.327886,342.100,0.00,227.8,1,,2.8,2.9,0.9,,19,4,3,,37,,";
   // Extract the first token
   char * token = strtok_f(string, ',');
   char **NMEA = NULL;

   NMEA = malloc(21*sizeof(char*));

   while( token != NULL ) {
      printf( " %s\n", token ); //printing each token
      NMEA[counter] = token;
      token = strtok_f(NULL, ',');
      counter++;
   }

   for (int i = 0; i <= counter; i++) {
      printf("[%d] - %s\n", i, NMEA[i]);
   }

   return 0;
}