n "unsigned char" typed variable in C$++$ has $8$ bits of storage. When a character is assigned to it$,$ the variable has the ASCII code of the character.

unsigned char $a=\text{'}{?}^{\text{'}}\text{'}$;

unsigned char b;

char $c$;

unsigned char $d=\text{'}**\text{'}$;

$a=a+14$;

b $=125--$ $ $\text{'}$;

$c={?}^{\text{'}}p\text{'}1\text{'}$;

$d=d+D^{\text{'}}$;