(Solved Homework): PLEASE HELP WITH C++!!! URGENT!!!…

PLEASE HELP WITH C++!!! URGENT!!!

Use visual studio to create a new C++ project. Your required in this task to impalement your own vector class. Your class is named Custom_Vector. The class includes at least following member functions:

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A default constructor that initialize your custom vector objects.

A destructor to release the memory to the heap.

push_back(string item) function that appends elements to the end of the vector.

pop() function that removes the last element of your vector and returns it.

disp() function that displays the elements of the vector.

size() function that returns the number of elements in the vector.

at(int index) function that returns the element at the position index (assume that the first

element in your vector at position 1.)

Implement a main function to test your method.
Your class accepts only string values. Therefore, you do not need to use templates.

For example, when I use the following main function:

int main(){
Custom_vector vector1;

vector1.push_back(“apples”); vector1.push_back(“bananas”); vector1.push_back(“pineapples”);

vector1.disp();
cout<<“The vector size = “<<vector1.size()<<endl;

cout<<vector1.at(10)<<endl; cout<<vector1.at(2)<<endl;
cout<<“Pop => “<<vector1.pop()<<endl;
cout<<“The vector size = “<<vector1.size()<<endl; return 0;

}

Expert Answer

 

Code to copy
//Include the needed headers
#include <iostream>
#include <string>
using namespace std;
//Function message()
bool message(const string &msg);
//Class
class Custom_Vector
{
//Access specifier
public:
//Constructor
Custom_Vector();
//Destructor
~Custom_Vector();
//Method push_back()
void push_back(const string & item);
//Method pop()
string pop();
//Method size()
unsigned size() const;
//Method at()
int at(int index);
//Method disp()
void disp() const;
//Access specifier
private:
//Struture
struct Custom_Vector_Node
{
//Variables needed
string data;
Custom_Vector_Node *next;
};
Custom_Vector_Node *vlast;
Custom_Vector_Node *vstart;
unsigned vectordata;
};
//Constructor
Custom_Vector::Custom_Vector() :vectordata(0), vlast(NULL), vstart(NULL){}
Custom_Vector::~Custom_Vector()
{
//Initialize
unsigned ele = size();
//Loop
for (unsigned i = 0; i<ele; i++)
//Delete
pop();
}
//Method size()
unsigned Custom_Vector::size()const
{
//Return
return vectordata;
}
//Method pop()
string Custom_Vector::pop()
{
//Check
if (vlast == NULL)
//Message
message(“underflow”);
//Initialize
Custom_Vector_Node *temp = vlast;
string data = temp->data;
vlast = temp->next;
//Delete
delete temp;
//Decrement
vectordata–;
//Return
return data;
}
//Method push_back()
void Custom_Vector::push_back(const string &item)
{
//Initialize
Custom_Vector_Node *temp = new Custom_Vector_Node;
temp->data = item;
temp->next = NULL;
//Check condition
if (vstart == NULL)
//Update
vstart = temp;
//Otherwise
else
{
//Update
Custom_Vector_Node *t2 = vlast;
t2->next = temp;
}
//Update
vlast = temp;
vectordata++;
}
//Method disp()
void Custom_Vector::disp() const
{
//Initialize
Custom_Vector_Node *temp = vstart;
//Loop
for (unsigned i = 0; i<size(); i++, temp = temp->next)
//Display
cout << temp->data << ‘n’;
}
//Method at()
int Custom_Vector::at(int index)
{
//Initialize
Custom_Vector_Node *temp = vstart;
//Check condition
if (index > size())
{
//Display
cout << “No item at index ” << index << endl;
return 0;
}
//Otherwise
else
{
//For loop
for (unsigned i = 0; i < size(); i++, temp = temp->next)
{
//Check condition
if (index == i)
//Display
cout << “Item at index ” << index << ” is ” << temp->data << ‘n’;
}
return 1;
}
}
//Method message
bool message(const string &msg)
{
//Display
cout << “Error: ” << msg;
//Exit
exit(EXIT_FAILURE);
}
//Driver
int main()
{
//Create object
Custom_Vector vector1;
//Function call push_back()
vector1.push_back(“apples”);
//Function call push_back()
vector1.push_back(“bananas”);
//Function call push_back()
vector1.push_back(“pineapples”);
//Function call disp()
vector1.disp();
//Function call size()
cout << “The vector size = ” << vector1.size() << endl;
//Function call at()
cout << vector1.at(10) << endl;
cout << vector1.at(2) << endl;
//Function call pop()
cout << “Pop => ” << vector1.pop() << endl;
//Function call size()
cout << “The vector size = ” << vector1.size() << endl;
//Function call disp()
vector1.disp();
//Pause
cin.get();
}

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