Answered: C++ programming language. Please help…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

C++ programming language.

Please help me complete the DynamicStringArray.cpp.

I pasted the codes that you need to complete it. Below is DynamicStringArray.h,DynamicStringArray.cpp, and the main.cpp. Please help me.

below code is DynamicStringArray.h:

//***********************************************//
// Please do not change the this file !!!!!
//***********************************************//
#ifndef DYNAMICSTRINGARRAY _H
#define DYNAMICSTRINGARRAY _H
#include <iostream>
#include <string>
using namespace std;

class DynamicStringArray
{
public:
DynamicStringArray();
int sizeIs();
string* getDynamicArray ();
void addEntry (string);
bool deleteEntry (string);
string* getEntry(int );
~DynamicStringArray ();
void printDynamicArray();

private:
string *dynamicArray;
int size;
};

#endif // DYNAMICSTRINGARRAY _H

BELOW IS MAIN.CPP

//***********************************************//
// Do not change the this main program !!!!!
//***********************************************//
#include "DynamicStringArray .h"
#include <iostream>
#include <string>
using namespace std;

int main()
{
int op;
string str;
DynamicStringArray List; //DynamicStringArray=NULL size=0
cout<<"------>>> choose an option from the menu <<<------"<<endl;

cout<<" 1.Add an entry to the list of string........"<<endl;
cout<<" 2.Delete an entry to the list of string....."<<endl;
cout<<" 3.Display the list entries.................."<<endl;
cout<<" 4.End Program..............................."<<endl;
do{
cout<<"\n >> Enter your option from the menu:";
cin>>op;
if(op<=0 || op>5) {
cout<<"Wrong choice. Try again!!"<<endl;
continue;
}
switch(op){
case 1:
cout<<" >>> Enter a string to add to the list: ";
cin>> str;
List.addEntry (str);
break;
case 2:
cout<<" >>> Enter a string to remove from the list: ";
cin>> str;
List.deleteEntry(str);
break;
case 3:
List.printDynamicArray();
break;
case 4:
break;
}

} while(op!=4);

cout<<"End of Program.Bye!";
return 0;
}

Below is the code i have to change:

// Write the implementation of every method of the class
// DynamicStringArray defined in DynamicStringArray.h

#include "DynamicStringArray .h"

//default constructor
DynamicStringArray ::DynamicStringArray (){

//write code body of DynamicStringArray ()

}

int DynamicStringArray ::sizeIs(){
//write code body of sizeIs ()
}

void DynamicStringArray ::addEntry (string str){
//write code body of addEntry ()
};

bool DynamicStringArray::deleteEntry (string str){
//write code body of deleteEntry ()
}
string* DynamicStringArray::getEntry(int index){
//write code body of deleteEntry ()
}
//destructor
DynamicStringArray ::~DynamicStringArray (){
//write code body of ~DynamicStringArray ()
}

void DynamicStringArray ::printDynamicArray(){
//write code body of printDynamicArray ()

}

One problem with dynamic arrays
is
that
the
is
created
once
array
using the new operator the size
might want
For example, you
to add or delete entries from the array. This project asks
cannot be changed.
you to create a
class called DynamicStringArray that includes member
functions that allow it.
The class should have the following private member variables
dynamicArray that references a dynamic array of type string.
size that holds the number of entries in the array.
The class should have the following public methods:
A default constructor that sets
the dynamic array
to
NULL
and
sets size to 0.
A function sizeIs that returns size.
function
named addEntry that
string
input.
element larger
А
takes
a
as
The
function should
create
new dynamic array one
a
than dynamicArray, copy all elements from dynamicArray into the
array,
add the
new string onto
the
end of
the
new
new
array,
increment
size,
delete
the
old dynamicArray
and
then
set
dynamicArray to the new array.
A function named deleteEntry that
takes
a string as input. The
function should search dynamicArray for the string. If not found,
it returns false.
If found, it creates
new dynamic array one
should copy all
delete dynamicArray ,
a
element smaller than dynamicArray.
It
elements
except the input string into the new array,
decrement size, and return true.
A
function
named getEntry that
takes
integer
input and
an
as
the
string at
index
in dynamicArray.
returns
that
It
should
return NULL if the index is out of dynamicArray's bounds.
A destructor that
frees up
the memory allocated to
the dynamic
array.
printDynamicArray ()
dynamicArray
that
displays
the
elements
of
the
Instructions:
You will be given 3 files:
DynamicStringArray.h
(Do not modify)
DynamicStringArray.cpp (to be competed)
main.cpp (Do not modify)

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