Listing List.cpp...

//Ben Harris
//List.cpp defines the methods for a List

#include <iostream>
#include <string>
#include <cstdlib>
#include "List.h"
#include "Node.h"
using namespace std;

List::List(){
	head = NULL;
}
List::~List(){
	delete head;
}
void List::add(string s){
	if (head && head->getvalue() == s) return;
	if (!head || head->getvalue() > s)head = new Node(s, head);
	else head = head->add(s);
}

void List::print(){

	cout << endl << "Library List" << endl << endl;
	if (head) head->print();
	cout << endl;
}

void List::remove(string s){
	if (head) head = head->remove(s, nullptr, this);
}

void List::sethead(Node * n){ head = n; }



Listing List.h...

//Ben Harris
//Header file for prototypes of List methods

#ifndef _LIST_
#define _LIST_

#include <iostream>
#include <string>
#include <cstdlib>
#include "Node.h"
using namespace std;

class Node;
class List{
private: // Each list contains only the pointer to its head Node.
	Node *head;
public:
	List(); // List Constructor
	~List(); // List Destructor
	void add(string s); // Adds a Node to the tail of the list, incrementing the counter if a duplicate string is entered.
	void print(); // Loops through the array twice: once to find the highest count, then a second time to print each Node that has that count value.
	void remove(string s); // Calls remove on the nodes that match string s
	void sethead(Node* n); // Head mutator
};

#endif


Listing Node.cpp...

//Ben Harris
//Node.cpp contains the code for each node

#include <iostream>
#include <string>
#include <cstdlib>
#include "Node.h"
#include "List.h"
using namespace std;

Node::Node(string s, Node *n){
	value = s;
	next = n;
}
Node::~Node(){delete next;}
string Node::getvalue(){return value;}
int Node::getcount(){return cnt;}
Node * Node::getnext(){return next;}
void Node::setnext(Node *n){ next = n; }

Node * Node::add(string s){
	if (value == s)return this;
	if (value > s) return new Node(s, this);
	if (!next){ next = new Node(s, nullptr); return this; }
	next = next->add(s);
	return this;
}

void Node::print(){
	cout << value << endl;
	if (next) next->print();
}

Node* Node::remove(string s, Node *prev, List *l){

	if (next) next = next->remove(s, this, l);
	if (value.find(s) < value.length() && value.find(s) >= 0)
	{
		Node *t = next;
		next = nullptr;
		delete this;
		return t;
	}
	return this;
}



Listing Node.h...

//Ben Harris
//Node.h is a header file for Node methods

#ifndef _NODE_
#define _NODE_

#include <iostream>
#include <string>
#include <cstdlib>
#include "List.h"
using namespace std;

class List;
class Node{
private: // Each Node contains a value, count, and a pointer to the next Node in the list.
	string value;
	int cnt;
	Node *next;
public:
	Node(string s, Node *n); // Node Constructor
	~Node(); // Node Destructor
	string getvalue(); // Value accessor
	int getcount(); // Count accessor
	Node * getnext(); // Next pointer accessor
	void setnext(Node* n); // Next pointer mutator
	Node * add(string s); // Adds a new Node to a list, incrementing the count for a Node if the same string is entered more than once.
	void print(); // Tells each node to print itself and its next
	Node* remove(string s, Node *prev, List *l); // Remove the nodes with matching string s and returns the new head
};

#endif


Listing PG4.cpp...

//Ben Harris
//This program manages a library of books by title, stored in a linked list

#include<iostream>
#include<string>
#include<cstdlib>
#include<cctype>
#include "PG4.h"
#include "List.h"
using namespace std;

int main(int argc, char **argv){
	string input = " ";
	List * list = new List();
	cout << "cLibrary Version 1.0 -- type help for a list of commands" << endl;
	while (converttolower(input) != "exit"){

		cout << "Enter command: ";
		getline(cin, input);
		string lower = converttolower(input);
		if (lower.substr(0, 3) == "add") list->add(input.substr(5, input.length() - 6));
		if (lower.substr(0, 6) == "remove") list->remove(lower.substr(8, input.length() - 9));
		if (lower == "print") list->print();
		if (list && lower == "clear") {delete list; List * list = new List();}
		if (lower == "help"){
			cout << endl << "These are the commands that this program accepts: " << endl << endl;
			cout << "add \"book title\" \t--adds a new entry with book title as the name" << endl;
			cout << "remove \"search term\" \t--deletes all books that contain search term" << endl;
			cout << "print \t\t\t--prints out the entire library in alphabetical order" << endl;
			cout << "clear \t\t\t--clears the entire library" << endl;
			cout << "exit \t\t\t--exits the program (also clears the library)" << endl << endl;
		}
	}
	delete list;
	return 0;
}

string converttolower(string s){
	for (int i = 0; i < s.length(); i++) s[i] = tolower(s[i]); return s;
}


Listing PG4.h...

// Ben Harris
// Header for PG4

#ifndef _PG4_
#define _PG4_

#include<iostream>
#include<string>
#include<cstdlib>
using namespace std;

int main(int argc, char **argv); // Main...
string converttolower(string s); // Used to convert strings to lower, since tolower() only converts one char at a time

#endif


Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\apoe\Desktop\Grading Folder>cppcompileall PG4.exe
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\apoe\Desktop\Grading Folder>"C:\Program Files\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86
Setting environment for using Microsoft Visual Studio 2010 x86 tools.

C:\Users\apoe\Desktop\Grading Folder>cl /Tp "List.cpp" /Tp "Node.cpp" /Tp "PG4.cpp" /O2 /EHsc /W2 /Za /link /OUT:PG4.exe
List.cpp
Node.cpp
PG4.cpp
Generating Code...
Microsoft (R) Incremental Linker Version 10.00.40219.01
Copyright (C) Microsoft Corporation.  All rights reserved.

/out:List.exe
/OUT:PG4.exe
List.obj
Node.obj
PG4.obj

C:\Users\apoe\Desktop\Grading Folder>Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.


C:\Users\apoe\Desktop\Grading Folder>PG4.exe < "C:\Grading\Classes\CS201-01-14F\PG4\PG4-1.in"
cLibrary Version 1.0 -- type help for a list of commands
Enter command:
Library List


Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command:
Library List

A
D
E
F
G
H
J
K
L
Q
R
S
T
W
X
b
c
e
i
m
n
o
p
q
r
t
u
v
w
y
z

Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command:
Library List

A
D
E
F
G
H
J
K
L
Q
R
S
T
W
X
m
n
o
p
q
r
t
u
v
w
y
z

Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command: Enter command:
Library List

A
D
E
F
G
H
J
K
L
Mostly Harmless
Q
R
S
T
The Hitchhiker's Guide To The Galaxy
The Restaurant At The End Of The Universe
W
X
m
n
o
p
q
r
t
u
v
w
y
z

Enter command: Enter command:
Library List


Enter command:
C:\Users\apoe\Desktop\Grading Folder>exit

Wrong answers due to not implementing case insensitivity.

25/50.

Fix by Friday 31 October 2014.