#include <stdio.h>


main() {
   unsigned char A[6] = {130, 92, 145, 145, 255, 255 } ;
   unsigned char B[6] = {155, 71, 145, 145,   0,   0 } ;
   unsigned char C[7] = {0, 0, 0, 0, 0, 0, 0} ;
   
   printf("\nData sizes:\n") ;
   printf("sizeof(char) = %d\n", sizeof(char)) ;
   printf("sizeof(short) = %d\n", sizeof(short)) ;
   printf("\n\n") ;

   unsigned short int x ;
   unsigned char carry ;

   carry = 0 ;
   for(int i = 0 ; i < 6 ; i++) {

      x = ( (short) A[i] ) + ( (short) B[i] ) + ( (short) carry ) ;
      C[i] = x % 256 ;      // should use bit operations here

      printf ("A[%d]=%3d  B[%d]=%3d  carry=%d  C[%d] = %3d \n", 
        i, A[i], i, B[i], carry, i, C[i]) ;

      carry = x / 256 ;     // should use bit operations here

   }

   C[6] = carry ;
   printf ("                             C[6] = %3d \n", C[6]) ;
}