Stuff

#include <iostream>using std::cin;using std::cout;using std::endl;#include "Filesystem.h"File::File(string inName, int inSize)	:name(inName),	 size(inSize)	{	nextPtr = NULL;	}const string File::get_name()	{	return name;	}int File::get_size()	{	return size;	}List::List()	{	headPtr = NULL;	}List::~List()	{	cout << "Destructing List" << endl;	while (headPtr) pop_front();	}void List::push_front(File *newPtr)	{	if (headPtr == NULL){		headPtr = newPtr;	} else {		newPtr->nextPtr = headPtr;		headPtr = newPtr;	}	}void List::pop_front()	{	if (headPtr != NULL) {		File *tempPtr = headPtr;		headPtr = headPtr->nextPtr;		delete tempPtr;	}	}void List::clear()	{	while (headPtr != NULL) {		pop_front();	}	}void List::traverse_list(void (*funcPtr)(File&))	{	File *nodePtr;	nodePtr = headPtr;	while (nodePtr != NULL) {		(*funcPtr)(*nodePtr);		nodePtr = nodePtr->nextPtr;	}	}	string Filesystem::fileName;int Filesystem::totalSize = 0;bool Filesystem::fileExist = false;Filesystem::Filesystem() 	{	}Filesystem::~Filesystem()	{	}void Filesystem::accumulate_size(File &filePtr)	{	totalSize += filePtr.get_size();	}void Filesystem::print_file_list(File &filePtr)	{	cout << filePtr.get_name() << "\t";	cout << filePtr.get_size() << endl;	}void Filesystem::find_same_file(File &filePtr)	{	if (filePtr.get_name() == fileName) fileExist = true;	}void Filesystem::add_file(string inName, int inSize) 	{		fileExist = false;		fileName = inName;		fileList.traverse_list(find_same_file);		if (fileExist == false){			File *filePtr;			filePtr = new File(inName, inSize);			fileList.push_front(filePtr);			cout << "File was sucessfully created." << endl;		} else {			cout << "A file by this name already exists, this file could not be added." << endl;		}			}void Filesystem::du()	{	totalSize = 0;		//resets size before each count	fileList.traverse_list(accumulate_size);	cout << "\nTotal Filesystem size is " << totalSize << "\n" << endl;	}void Filesystem::ls()	{	cout << "\n" << endl;		cout << "Name \t\t" << "Size" << endl;	fileList.traverse_list(print_file_list);	cout << "\n" << endl;	}void Filesystem::clean()	{	fileList.clear();	}int main(){	Filesystem myFilesystem;	int choice=1;	string fileName;	int fileSize;	while (choice <= 4 && choice >= 1){				cout << "Enter 1 to Add Files" << endl;		cout << "Enter 2 to View File List" << endl;		cout << "Enter 3 to View Total Size of the Filesystem" << endl;		cout << "Enter 4 to Format the File System" << endl;		cout << "Enter 5 to Exit" << endl;		cin >> choice;		while (choice > 5 || choice < 1){			cout << "Invalid Input Selection." << endl;			cout << "Enter 1 to Add Files" << endl;			cout << "Enter 2 to View File List" << endl;			cout << "Enter 3 to View Total Size of the Filesystem" << endl;			cout << "Enter 4 to Format the File System" << endl;			cout << "Enter 5 to Exit" << endl;				cin >> choice;		}		switch (choice)		{			case 1:				cout <<	"Please enter the name of the file you wish to add: ";					cin >> fileName;					cout << "Please enter the size of " << fileName << ": ";				cin >> fileSize;				myFilesystem.add_file(fileName, fileSize);				break;			case 2:				myFilesystem.ls();				break;			case 3:				myFilesystem.du();				break;			case 4:				myFilesystem.clean();				break;			case 5:				return 0;						default:				break;		}	}}