Structure - Access Structure element without . and ->

Question

I am required to access some elements from nested structure without using . and ->

I need to print out the values for keyValue

Answer 1

More straightforward and simpler 3 Line code could be...

//Get the address of the tesla      
  char *addressoftesla  = (laptop_S*)(&tesla);

//structure of tesla = simpleMouse + qwerty + 2 byte paddings

/* Get the value at the starting address of qwerty i.e keyValue*/
  printf("keyValue of tesla keyboard is %c\n",*(addressoftesla+sizeof(mouse_S)));

/* Get the value at the starting address of qwerty i.e alternatekeyValue */
  printf("alternatekeyValue of tesla keyboard is %c\n",*(addressoftesla+sizeof(mouse_S)+1));

  /*
  * More info for further understanding: 
  * A simple check to see all the values in the each field of structure
  * tesla - you can also use sizeof to get the each structure and entire 
  * structure byte sizes and the same can be done using offsetof as in 
  * other solution
  */
  for(int i = 0; i< 12; i++)
  {
      printf("value at tesla[i] is %d \n",*(addressoftesla+i));
  }