Parse GPS String for Time and Coordinates

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

void parse_gprmc(char *a) 
{
   char *data_tokens[7];
   int k=0;

   char *token=strtok(a,",");
   while(token)
   {
    data_tokens[k++]=token;
    token=strtok(NULL,",");
   }

   //To print Time: The way to identify this formatting is turning point of solving the problem.
   printf("Time: %.2s:%.2s:%.2s\n",data_tokens[1],data_tokens[1]+2,data_tokens[1]+4);

   //To print Latitude:
   printf("Latitude: %s %s\n",data_tokens[3],data_tokens[4]);

   //To print Longitude
   printf("Longitude: %s %s\n",data_tokens[5],data_tokens[6]);
}

int main() {
    char a[100];
    fgets(a, sizeof(a), stdin);
    parse_gprmc(a);
    return 0;
}