/*
 * Arrays of strings; contiguous vs. row-pointer layout.
 *
 * Jed Yang
 */
#include <stdio.h>

void print_contiguous(char (*days1)[10]) {
   for (int i = 0; i < 7; i++)
      printf("days1[%d] = %s\n", i, days1[i]);
   printf("sizeof(days1) = %li\n", sizeof(days1));
   printf("sizeof(days1[2]) = %li\n", sizeof(days1[2]));
   printf("sizeof(days1[2][3]) = %li\n", sizeof(days1[2][3]));
   printf("\n");
}

void print_row_pointer(char **days2) {
   for (int i = 0; i < 7; i++)
      printf("days2[%d] = %s\n", i, days2[i]);
   printf("sizeof(days2) = %li\n", sizeof(days2));
   printf("sizeof(days2[2]) = %li\n", sizeof(days2[2]));
   printf("sizeof(days2[2][3]) = %li\n", sizeof(days2[2][3]));
   printf("\n");
}

int main(void) {
   // contiguous layout
   // "7" can be omitted and the compiler would fill it in for us.
   // try changing "10" to "9"
   char days1[][10] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
   for (int i = 0; i < 7; i++)
      printf("days1[%d] = %s\n", i, days1[i]);
   printf("sizeof(days1) = %li\n", sizeof(days1));
   printf("sizeof(days1[2]) = %li\n", sizeof(days1[2]));
   printf("sizeof(days1[2][3]) = %li\n", sizeof(days1[2][3]));
   printf("\n");
   print_contiguous(days1);

   // row-pointer layout
   // "7" can be omitted and the compiler would fill it in for us.
   char *days2[] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
   for (int i = 0; i < 7; i++)
      printf("days2[%d] = %s\n", i, days2[i]);
   printf("sizeof(days2) = %li\n", sizeof(days2));
   printf("sizeof(days2[2]) = %li\n", sizeof(days2[2]));
   printf("sizeof(days2[2][3]) = %li\n", sizeof(days2[2][3]));
   printf("\n");
   print_row_pointer(days2);

   return 0;
}