C++ Add the following functionality in the code given below: 1) Support ToDo List items that take a space (i.e. "Got to Store") 2) Save any existing list items to a file using the class destructor (i.e. ~ToDo() ) 3) If saved file exists, use constructor to open file pre-populate todo list. 4) Change `Done` function so a user can select which item to finish.

# ToDo.cpp

#include "ToDo.h"

using namespace std;

ToDo::ToDo(){

ToDo(5);

}

ToDo::ToDo(int len){

length = len;

list = new string[length];

}

ToDo::~ToDo(){

delete [] list;

}

// Add an item to list

void ToDo::add(string item){

if(next < length){

list[next] = item;

next++;

}

}

// Finish the last thing in list

void ToDo::done(){

next--;

list[next] = "";

}

// Print list

void ToDo::print(){

for(int i=0;i

cout << " " << i << " " << list[i] << endl;

}

}

# ToDo.h

#include

#include

using namespace std;

// g++ main.cpp ToDo.cpp

class ToDo {

private:

string *list;

int length = 0;

int next = 0;

public:

// Default Constructor

ToDo();

// Create list of length len

ToDo(int len);

// Destroy out list

~ToDo();

// Add an item to list

void add(string item);

// Finish the last thing in list

void done();

// Print list

void print();

};

# main.cpp

#include
	#include
	#include "ToDo.h"
	using namespace std;
	int main(){
	char next = 'y';
	int len = 0;
	string action;
	cout << "How long to you want your list: ";
	cin >> len;
	ToDo list(len);
	// Array of ToDo objects
	// Make sure you have a () constructor
	ToDo manylists[10];
	// manylists[2].print();
	// manylists[1].print();
	while(next != 'x'){
	cout << "Add to list (a)" << endl;
	cout << "Done list item (d)" << endl;
	cout << "Print list (p)" << endl;
	cout << "Exit list app (x)" << endl;
	cout << "What do you want to do: ";
	cin >> next;
	switch(next){
	case 'a':
	cout << "Name a todo item: ";
	cin >> action;
	list.add(action);
	break;
	case 'd':
	list.done();
	break;
	case 'p':
	list.print();
	break;
	case 'x':
	// All done with todo list
	break;
	}
	}
	}