Member Avatar for Slavrix

hey guys, i got an assingment due and i was wondering if you could please help me to debug this program.

5 files,
ass1.h
ass1.cpp
main.cpp
Makefile.txt (needs to be renamed to makefile for it to be used properly)
ass1.txt(needs to be renamed ass1.dat to be used[its the database for the books])

to be compiled for a linux environment

the files to be loaded needs to change from text to binary file type, i havnt been able to work out how to do that yet

/****************************************************************
 * ass1.cpp - CSCI124 - Ass1 - Contains the functions           *
 * <Nicholas Tsaoucis - nt647>                                  *
 ****************************************************************/
#include <iostream>
#include "ass1.h"
using namespace std;

bool Loadrecords(const char);
bool SaveRecords(const char);
bool FindRacords(const char);
void DisplayRecords(ostream& outs, int i);
void ChangeStatus(ostream& outs, int i);
void PrintAll();

bool LoadRecords(const char filename[])
{
	ifstream ins;
	
	ins.open(filename);
	
	if (ins.good())
	{
		ins >> numrecords;
	
		for (int i = 0; i < numrecords; i++)
		{
			ins >> database[i].title;
			ins >> database[i].barcode;
			ins >> database[i].runtime;
			ins >> database[i].category;
			ins >> database[i].numcopies;
		}
		ins.close();
		return true;
	}
	ins.close();
	return false;

}


bool SaveRecords(const char filename[])
{
	ofstream outs;
	
	if (numrecords == 0)
		return false;
		
	outs.open(filename);
	
	if (outs.good())
	{
		int i = 0;
		outs << numrecords << endl;
		while(i < numrecords)
		{
			PrintRecords(outs, i);
			i++;
		}
		outs.close();
		return true;
	}
	else
		return false;
}

bool FindRecord(const char key[])
{
	int i = 0;
	while (i < numrecords)
	{
		if (strcmp(key, database[i].title) == 0)
		{
			PrintRecords(cout, i);
			return true;
		}
		else
			i++;
	}
	return false;
}

void PrintRecords(ostream& outs, int i)
{
		outs << database[i].title << endl;
		outs << database[i].barcode << endl;
		outs << database[i].runtime << endl;
		outs << database[i].category << endl;
		outs << database[i].numcopies << endl;
}

void PrintAll()
{
	for (int i = 0; i < numrecords; i++)
	{
		cout << "Printing Record " << i + 1 << endl;
		cout << database[i].title << endl;
		cout << database[i].barcode << endl;
		cout << database[i].runtime << endl;
		cout << database[i].category << endl;
		cout << database[i].numcopies << endl;
		cout << endl;
	}
}
#include <iostream>
#include <fstream>
using namespace std;

const int MAXTITLE = 100;
const int MAXCATEGORY = 50;
const int MAXNAME = 100;

// data structure describing a movie

struct book
{
	char Title[MAXTITLE+1];
	char CallNumber;
	char Author;
	char category[MAXCATEGORY+1];
	int BookStatus;
	char DueDate;
	Char Borrowersname[MAXNAME+1];
};

bool Loadrecords(const char);
bool SaveRecords(const char);
bool FindRacords(const char);
void DisplayRecords(ostream& outs, int i);
void ChangeStatus(ostream& outs, int i);
void PrintAll();
001.645.2
Learning C++
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1
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C++ Handbook
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/****************************************************************
 * main.cpp - CSCI124/MCS9124 - Ass1 - Contains main() for library database
 * <Name - Login - data>
 * Do not alter this file
 ****************************************************************/
#include <iostream>
#include "ass1.h"
using namespace std;

void PrintMenu();

int main()
{
	bool Proceed = true;
		
	LoadRecords();
	PrintMenu();
	while (Proceed)
	{
		char Command;
		cout << "Enter command (or m for menu): ";
		cin >> Command;
		cin.ignore();
		switch (Command)
		{
			case 'l': case 'L':
				LoadRecords();	// Loads records from data file
				break;
			case 's': case 'S':
				SaveRecords();  //Saves records to the data file 
				break;
			case 'f': case 'F':
				FindRecord();	// Asks user for book's Call number and 						// displays found record on screen
				break;
			case 'd': case 'D':
				DisplayRecords(); // Display all books on screen one at 						  // a time
				break;
			case 'c': case 'C':
				ChangeStatus();	// Asks user for book's Call number and
                            			// changes records status
                            			// If status is changed to OnLoan
                            			// the due date and borrowers name
                            			// are also requested and changed 
				break;
			case 'm': case 'M':
				PrintMenu();
				break;
			case 'q': case 'Q':
				Proceed = false;
				break;
			default:
				cerr << "Illegal command. Try again." << endl;		
		}
	}
	cout << "Quitting Program!" << endl;
	SaveRecords();
	return 0;
}

void PrintMenu()
{
 	cout << "Valid Commands:\n"
	     << "  (L)oad Records from file\n"
	     << "  (S)ave Records to file\n"
	     << "  (F)ind Book's Record\n"
	     << "  (D)isplay all Books\n"
	     << "  (C)hange Book's Status\n"
	     << "  (M)enu Display\n"
	     << "  (Q)uit\n\n";
}
CC=g++

all:	ass1

ass1:	main.o ass1.o
	$(CC) main.o ass1.o -o ass1

main.o:	main.cpp ass1.h
	$(CC) -c main.cpp

ass1.o:	ass1.cpp ass1.h
	$(CC) -c ass1.cpp
  • 4 Contributors
  • 13 Replies
  • 260 Views
  • 1 Day Discussion Span
  • Latest Post Latest Post by Slavrix

Recommended Answers

All 13 Replies

Member Avatar for jwenting

no, we're not going to do that. We're certainly not going to sheepishly compile and run your code and fix it for you.

Member Avatar for iamthwee

Ask specific questions. Post your code here not as attachments. Read the forum rules etc...

Member Avatar for Slavrix

well it was worth a try

i fixed it all now anyhow, except one thing, my makefile.

CC=g++

all:	ass1

ass1:	main.o ass1.o
	$(CC) main.o ass1.o -o ass1

main.o:	main.cpp ass1.h
	$(CC) -c main.cpp

ass1.o:	ass1.cpp ass1.h
	$(CC) -c ass1.cpp

there it is, and here is the error (im using SSH to compile with, its connected to uni servers running ubuntu)

$ make
make: Fatal error in reader: Makefile, line 3: Unexpected end of line seen

Member Avatar for SpS

Try this

CC=g++
 
ass1:	main.o ass1.o
	$(CC) main.o ass1.o -o ass1
 
main.o:	main.cpp ass1.h
	$(CC) -c main.cpp
 
ass1.o:	ass1.cpp ass1.h
	$(CC) -c ass1.cpp
Member Avatar for Slavrix

still not working, error got bigger


mksh: Warning: newline is not last character in file Makefile
Current working directory /home/ug/q/nt647
make: Fatal error in reader: Makefile, line 3: Unexpected end of line seen

Member Avatar for SpS

Try implicit rules

CC = g++
 
ass1: main.o ass1.o
	$(CC) main.o ass1.o -o ass1
 
main.o:	main.cpp ass1.h
 
ass1.o:	ass1.cpp ass1.h
Member Avatar for SpS

I just downloaded your files(.cpp & .h) and tried the Makefile. Makefile just works fine. The problem is with your codes.

Member Avatar for Slavrix

??

that code there btw is out of date, i have almost completly re-written it all, (except the main.cpp)

i put all my code into one file and compiled it and it worked fine (my new stuff) but when i split it again, for the makefile to do its job, it didnt complie

Member Avatar for SpS

Post your corrected codes(all .cpp and .h files). I will try them at my end with the Makefile.

Member Avatar for Slavrix

ok, i got my makefile working, but there seems to still be an error that i cant find , int he code itself, if possible could you see if you could find it ?

dont forget to change the makefile.txt back to makefile (just a reminder :P )

the error im getting now is

main.cpp:1: error: stray '\239' in program
main.cpp:1: error: stray '\187' in program
main.cpp:1: error: stray '\191' in program

/****************************************************************
 * ass1.cpp - Contains the functions                            *
 * <Nicholas Tsaoucis - nt647>                                  *
 ****************************************************************/
#include <iostream>
#include <fstream>
#include <cstring>
#include "ass1.h"
using namespace std;

char* GetBooktatus (unsigned);
void LoadRecords();
int calculateNumRecords();
void convert();
void SaveRecords();
void FindRecord();
void DisplayAllRecords();
void ChangeStatus();
void DisplaySingleRecord (Book &book);
int Seek( char *searchKey);

void convert()
{
	cout << endl;
     int i = 1;
     Book temp;
     fstream textFile;
     ofstream dataFile;
     textFile.open("ass1.txt", ios::in);
     if (textFile.fail())
     {
        cout << "Could not open \"ass1.txt\". Closing Program" << endl;
        exit(1);
     }
     
     dataFile.open("ass1.dat", ios::out | ios:: binary);
	 while(!textFile.eof() && i <100)
	{
        cout << "Writing Record Number: " << i <<endl;
        memset (&temp, '\0', sizeof (Book));
		textFile.getline ( temp.CallNo, MAX_CALL);
		if (strlen (temp.CallNo) == 0)
		{
		
			break;
		}
		textFile.getline(temp.Title, MAX_TITLE);
		textFile.getline(temp.Author, MAX_AUTHOR);
		textFile >> temp.Status;
		textFile.ignore (1);
		if (temp.Status == 2)
		{
    		textFile.getline (temp.Date, MAX_DATE);
    		textFile.getline(temp.Borrower, MAX_BORROWER);
        }
		dataFile.write((char*)&temp, sizeof(Book));
		i++;
	}
	if (i == 100)
       cout << "Limit Reached!!!" << endl;
    else
	    cout << "Finished Writing all recoreds from \"ass1.txt\" to \"ass1.dat\"." << endl << endl;
	textFile.close();
	dataFile.close();
	
	cout << endl;
     
 }

char* GetBooktatus (unsigned Status)
{
	switch (Status)
	{
	case 1: 
		return "In Library";
	case 2: 
		return "On Loan";
	case 3: 
		return "Lost";
	default:
		return "Unknown Status: ";
	}	
}

void DisplaySingleRecord (Book &book)
{
	cout << endl << "Call Number: ";
	cout << book.CallNo << endl;
	cout << "Title: ";
	cout << book.Title << endl;
	cout << "Author: ";
	cout << book.Author << endl;
	cout << "Status: ";
	cout << GetBooktatus (book.Status) << endl;
	if (2== book.Status)
	{
		cout << "Due Date: ";
		cout << book.Date << endl;
		cout << "Borrower: ";
		cout << book.Borrower << endl;
	}
	cout << endl;
}

void DisplayAllRecords()
{
	bool proceed = true;
	char option;
	for (int i = 0; i < bookToal && proceed; i++)
	{
		DisplaySingleRecord (dbBook[i]);

		do
		{
			cout << "Display next record?(y/n)" << endl;
			cin >> option;
			option = tolower (option);

			if (option == 'y')
			{
				proceed = true;
			}
			else if (option == 'n')
			{
				proceed = false;
			}
		}while(option != 'n' && option != 'y');
	}
	cout << endl << "Finished Printing" << endl;
}

void ChangeStatus()
{
	bool ok = true;
	Book temp;
	unsigned newStatus;
	fstream dataFile;

	dataFile.open("ass1.dat", ios::in | ios::out | ios::binary);
	if (dataFile.fail())
	{
		cout << "Error: failed to change Status - ass1.dat failed to open" << endl;
		return;
	}
	else
	{
		char searchKey [100];
		cout << "Enter the call number of the book for which you are searching for" << endl;
		cin.getline(searchKey, 100);
		int position = Seek(searchKey);
		if (position < 0)
		{
			cout << "" << endl;
			ok = false;
		}
		else
		{
			dataFile.seekg(position);
			dataFile.read((char*)&temp, sizeof(Book));
			if (0 == strcmp (temp.CallNo, searchKey))			{
				
				cout << "What is the new book Status? (1=In Library, 2 = On loan, 3 = Lost): ";
				cin >> newStatus;
				cin.ignore();
				if (1 == newStatus)
				{
					cout << "Status Changed to \"In Library\"." << endl;
					temp.Status = 1;
				}
				else if (2 == newStatus)
				{
					cout << " Status Changed to \"On Loan\"." << endl;
					temp.Status = 2;
					cout << "When is the book due? (DD MM YY): ";
					cin.getline(temp.Date, MAX_DATE);
					cout << "Who borrowed the book? ";
					cin.getline(temp.Borrower, MAX_BORROWER);
				}
				else if (3 == newStatus)
				{
					cout << " Status Changed to \"Lost\"." << endl;
					temp.Status = 3;
				}
				else
				{
					cout << "in valid option." << endl;
					ok = false;				}
				if (ok)
				{
					dataFile.seekg(position);
					if (dataFile.fail ())
					{
						cout << "Error: failed to find " << position << endl;
						ok = false;
					}
					else
					{
						dataFile.write((char*)&temp, sizeof(Book));

						if (dataFile.fail ())
						{
							cout << "Error: failed to upDate Status " << endl;
							ok = false;
						}
					}
				}
			}

		}
		dataFile.close();

		if (ok )
		{
			cout << "Refreshing local cache ..." << endl;
			LoadRecords();
		}
	}
}

int Seek( char *searchKey)
{
	cout << endl;
	int position;
	Book bookDB;
	bool found = false;
	fstream dataFile;
	dataFile.open("ass1.dat", ios::in | ios::binary);
	if (dataFile.fail())
	{
		cout << "Error opening \"ass1.dat\"." << endl;
		return -1;
	}

	for (int i = 0; i < bookToal && found == false; i++)
	{
		position = dataFile.tellg();
		dataFile.read((char*)&bookDB, sizeof(Book));
		if (strcmp(bookDB.CallNo, searchKey) == 0)
		{
			cout << "Record Found at position " << position << endl;
			DisplaySingleRecord (bookDB);
			found = true;
			break; 
		}

	}
	if (false == found)
	{
		cout << "Record not found." << endl;
		position = -1; // -1 means not found
	}
	dataFile.close ();
	return position;
	cout << endl;
}

void LoadRecords()
{
	cout << endl;
    fstream dataFile;
    dataFile.open("ass1.dat", ios::in | ios:: binary);
    if (dataFile.good())
    {
       int count = 0;
       int numrecords = 0;
       cout << "ass1.dat was opened successfully" << endl;

       numrecords = calculateNumRecords();
       while (count < numrecords)
       {
             dataFile.read((char*)&dbBook[count], sizeof(Book));
             count ++;
       }
	   bookToal = count;
       dataFile.close();
       
       
       
    }
    else
    {
        cout << "\"ass1.dat\" failed to open, recreating \"ass1.dat\" from \"ass1.txt\" now" << endl;
        // dataFile.close();
        convert();
    }
   	cout << endl; 
}

int calculateNumRecords()
{
	cout << endl;
     int totalSize = 0;
     int numrecords;
     fstream dataFile;
     dataFile.open("ass1.dat", ios::in | ios::binary);
     dataFile.seekg(0, ios::end);
     totalSize = dataFile.tellg();
     numrecords = totalSize / sizeof(Book);
     dataFile.close();
     cout << "Number of records is: " << numrecords <<endl;
     return numrecords;
	 cout << endl;
 }

void SaveRecords()
{
	cout << endl;
	fstream dataFile;
	dataFile.open("ass1.dat", ios::out | ios::binary);
	if (dataFile.fail())
		cout << "Error creating \"ass1.dat\". " << endl;
	else
	{
		for (int i = 0; i < bookToal; i++)
		{
			dataFile.write((char*)&dbBook[i], sizeof(Book));
			if (!dataFile)
			{
				cout << "Error writing." << endl;
				break;
			}
		}
		
		dataFile.close();
	}
	cout << endl;
}
 
void FindRecord()
{
	cout << endl;
     char searchKey[100];
     bool found = false;
     cout << "Enter the call number of the book:" << endl;
     cin.getline(searchKey, 100);

	 for (int i = 0; i < bookToal && found == false; i++)
	 {
          if (strcmp(dbBook[i].CallNo, searchKey) == 0)
          {
             cout << "Record Found:" << endl;
			  DisplaySingleRecord (dbBook[i]);
             found = true;
          }

      }
      if (false == found)
      {
         cout << "Record not found." << endl;
      }
	  cout << endl;
}
/****************************************************************
 * ass1.h - headerfile                                          *
 * <Nicholas Tsaoucis - nt647>                                  *
 ****************************************************************/
#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

const int MAX_TITLE = 50;
const int MAX_AUTHOR = 50;
const int MAX_BORROWER = 50;
const int MAX_DATE = 50;
const int MAX_CALL = 50;
const char onLoan = '2';

struct Book
{
	char CallNo[MAX_CALL + 1];
	char Title[MAX_TITLE+1];
	char Author[MAX_AUTHOR+1];
	unsigned Status;
	char Date[MAX_DATE+1];
	char Borrower[MAX_BORROWER + 1];
};

static Book dbBook[100];
static int bookToal;

void PrintMenu();
char* GetBooktatus (unsigned);
void LoadRecords();
int calculateNumRecords();
void convert();
void SaveRecords();
void FindRecord();
void DisplayAllRecords();
void DisplayRecords();
void ChangeStatus();
void DisplaySingleRecord (Book &book);
int Seek( char *searchKey);
001.645.2
Learning C++
Gregory	Harrison
1
001.721.3
C++ for Beginners
Quentin	Resnick
2
25 9 1999
Me
001.384.2
C++ Tools
Kieren Legrande
1
001.098.5
Learning C++ in 7 days
Yolanda	Zefirovic
1
001.491.8
C++ for C Programmers
Christopher Davenport
3
001.967.2
Effective C++ 
Xavier Williams
2
12 7 2006
Jack Murphy
001.077.4
C++ Handbook
Erica Forsythe
2
22 9 1999
Fred Flynn
001.947.2
Teach Yourself C++
Anna Baker
1
001.997.1
Borland C++
Owen Porter
2
1 10 1999
Sue Baker
001.095.3
Symantic C++
Uriah VanDenBerg
1
001.823.8
C++ Examples
Imran Jabeil
2
23 11 1998
John Jones
001.812.9
C++ Guidelines
Salvatore Torelli
1
005.920.4
C++ Development Environments
Minh Nguyen
1
/****************************************************************
 * main.cpp - CSCI124/MCS9124 - Ass1 - Contains main() for library database
 * <Name - Login - data>
 * Do not alter this file
 ****************************************************************/
#include <iostream>
#include "ass1.h"
using namespace std;

void PrintMenu();

int main()
{
	bool Proceed = true;
		
	LoadRecords();
	PrintMenu();
	while (Proceed)
	{
		char Command;
		cout << "Enter command (or m for menu): ";
		cin >> Command;
		cin.ignore();
		switch (Command)
		{
			case 'l': case 'L':
				LoadRecords();	// Loads records from data file
				break;
			case 's': case 'S':
				SaveRecords();  //Saves records to the data file 
				break;
			case 'f': case 'F':
				FindRecord();	// Asks user for book's Call number and 						// displays found record on screen
				break;
			case 'd': case 'D':
				DisplayRecords(); // Display all books on screen one at 						  // a time
				break;
			case 'c': case 'C':
				ChangeStatus();	// Asks user for book's Call number and
                            			// changes records status
                            			// If status is changed to OnLoan
                            			// the due date and borrowers name
                            			// are also requested and changed 
				break;
			case 'm': case 'M':
				PrintMenu();
				break;
			case 'q': case 'Q':
				Proceed = false;
				break;
			default:
				cerr << "Illegal command. Try again." << endl;		
		}
	}
	cout << "Quitting Program!" << endl;
	SaveRecords();
	return 0;
}

void PrintMenu()
{
 	cout << "Valid Commands:\n"
	     << "  (L)oad Records from file\n"
	     << "  (S)ave Records to file\n"
	     << "  (F)ind Book's Record\n"
	     << "  (D)isplay all Books\n"
	     << "  (C)hange Book's Status\n"
	     << "  (M)enu Display\n"
	     << "  (Q)uit\n\n";
}
CC=g++

all:	ass1

ass1:	main.o ass1.o
	$(CC) main.o ass1.o -o ass1

main.o:	main.cpp ass1.h
	$(CC) -c main.cpp

ass1.o:	ass1.cpp ass1.h
		$(CC) -c ass1.cpp
Member Avatar for Slavrix

ok, fixed, that, now this error instead :"(


$ make
g++ -c main.cpp
g++ -c ass1.cpp
g++ main.o ass1.o -o ass1
Undefined first referenced
symbol in file
DisplayRecords() main.o
ld: fatal: Symbol referencing errors. No output written to ass1
collect2: ld returned 1 exit status
*** Error code 1
make: Fatal error: Command failed for target `ass1'


use that main

/****************************************************************
 * main.cpp - CSCI124/MCS9124 - Ass1 - Contains main() for library database
 * <Name - Login - data>
 * Do not alter this file
 ****************************************************************/
#include <iostream>
#include "ass1.h"
using namespace std;

void PrintMenu();

int main()
{
	bool Proceed = true;
		
	LoadRecords();
	PrintMenu();
	while (Proceed)
	{
		char Command;
		cout << "Enter command (or m for menu): ";
		cin >> Command;
		cin.ignore();
		switch (Command)
		{
			case 'l': case 'L':
				LoadRecords();	// Loads records from data file
				break;
			case 's': case 'S':
				SaveRecords();  //Saves records to the data file 
				break;
			case 'f': case 'F':
				FindRecord();	// Asks user for book's Call number and 						// displays found record on screen
				break;
			case 'd': case 'D':
				DisplayRecords(); // Display all books on screen one at 						  // a time
				break;
			case 'c': case 'C':
				ChangeStatus();	// Asks user for book's Call number and
                            			// changes records status
                            			// If status is changed to OnLoan
                            			// the due date and borrowers name
                            			// are also requested and changed 
				break;
			case 'm': case 'M':
				PrintMenu();
				break;
			case 'q': case 'Q':
				Proceed = false;
				break;
			default:
				cerr << "Illegal command. Try again." << endl;		
		}
	}
	cout << "Quitting Program!" << endl;
	SaveRecords();
	return 0;
}


void PrintMenu()
{
 	cout << "Valid Commands:\n"
	     << "  (L)oad Records from file\n"
	     << "  (S)ave Records to file\n"
	     << "  (F)ind Book's Record\n"
	     << "  (D)isplay all Books\n"
	     << "  (C)hange Book's Status\n"
	     << "  (M)enu Display\n"
	     << "  (Q)uit\n\n";
}
Member Avatar for SpS

That's a linker error. It seems that you don't have defination of DisplayRecords() .

Member Avatar for Slavrix

yea, i jsut had a thoroguh read of it, and found teh problem, please come and shoot me where i stand

DisplayRecord();
DisplayRecords();

i mixed it up in one spot :)

the makefile problems i was haveing seemed to be coming from invisible characters, i got my mate to retype on on his linux and send to me and i used that fine

but yea mate, thnx again for ur help

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