B$1$ Given test$\_$Str$.$cpp write the corresponding header file and implementation file $($Str$.$h$,$ Str$.$cpp$).$

$//$ test$\_$Str$.$cpp

#include

#include $"$Str$.$h$"$

using namespace std;

int main$()$

$\{$

Str s$1$;

char courseName$[]="$cpp$"$;

Str s$2($courseName$)$;

Str s$3($s$2)$;

s$2.$print$()$; $//$cpp

s$3.$print$()$; $//$cpp

s$1=$ s$2$; s$1.$print$()$;

$//$cpp

$++$s$1$; s$1.$print$()$;

$//$dqq

s$1[0]=\text{'}$P$\text{'}$; s$1.$print$()$; $//$Pqq

return $0$;

$\}$

Hint: use the following information $!!$

$//$CONSTRUCTORS$.$ Apply memory allocation for each constructor.

$//$ First One: An empty constructor: only NULL character, Size:$1$

$//$ Second One: Creates a string fills with arr's elements. arr can have different

size.

$//$ Third One: Copy constructor. Source string object can have different size.

$//$ OPERATORS

$//==$ Assignment operator. Left$-$hand side string object can have different size.

$//$ Apply memory allocation for the assignment operator

KOM$3550$ Object$-$Oriented Programming

Assignment $3$

$2$

$//++$ Pre$-$increment. Increments the elements of the string by one value.

$//[]$ Subscript operator: returns an lvalue through indexing.

$//$ OTHER FUNCTIONS

$//$ Display the string.

private:

int Size; $//$ the Size of the string including NULL.

char$*$ str;

$//$ the pointer should point the characters of the string $+$ NULL.