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

int main  () {

  char* array [2] = {"12345678912345678","12345678"};
  int a = sizeof  (array [0]);

  fprintf (stdout, "%s , %d n", array [0], a);

  return 0;
}

12345678912345678 , 12345678

int a = strlen(array [0]);