Project

#include <iostream>
#include <fstream.>
#include <cstring>
#include <cstdlib>
using namespace std;

struct Entry
{
    char nameFirst[20];
    char nameLast[20];
    char phoneNumber[20];
    char eMail[40];
    bool DELETED;

};

int getChoice();
Entry* openFile(Entry* fpBuffer,size_t fBufferSize, int &eleCount,const size_t resizeStep, string &filename);
void listEntries(Entry* fpBuffer, int elemCount);
void changeEntry (Entry* fpBuffer, int elemCount);
void deleteEntry (Entry* fpBuffer, int &elemCount);
void addEntry (Entry* fpBuffer, int &elemCount,size_t &fBufferSize, size_t resizeStep);
Entry* resizeArrayCopy(Entry*& fpBuffer,const size_t resizeStep,size_t &bufferSize);
Entry* resizeArrayNoCopy (Entry*& fpBuffer, size_t &bufferSize,const size_t resizeStep);
void saveFile (string filename, Entry* fpArray, int elementsCount);
void saveFileAs (string filename, Entry* fpArray, int elementsCount);
void searchEntry (Entry* fpArray, int elemCount);
void exportTextFile (Entry* fpArray, int elemCount);
void exportText (string fileExport, int elemCount, Entry* fpArray);

int main()
{
    Entry* pArray=NULL;
    Entry* sortArray=NULL;
    string filename;
    size_t bufferSize=4;
    const size_t resizeStep=15;
    int choice;
    int elementsCounter;
    choice=getChoice();
    while (choice!=10)
    {

        switch (choice)
        {
        case 1 :
            pArray = openFile(pArray, bufferSize, elementsCounter, resizeStep,filename);
            break;
        case 2 :
            saveFile (filename, pArray, elementsCounter);
            break;
        case 3 :
            saveFileAs (filename, pArray, elementsCounter);
            break;
        case 4 :
            addEntry (pArray, elementsCounter, bufferSize, resizeStep);
            break;
        case 5 :
            changeEntry (pArray, elementsCounter);
            break;
        case 6 :
            deleteEntry (pArray, elementsCounter);
            break;
        case 7 :
            searchEntry (pArray, elementsCounter);
            break;
        case 8 :
            listEntries(pArray, elementsCounter);
            break;
        case 9:
        {
            sortArray=new Entry[bufferSize];
            for(size_t i = 0; i < bufferSize; i++)
            {
                strcpy(sortArray[i].nameFirst, pArray[i].nameFirst);
                strcpy(sortArray[i].nameLast, pArray[i].nameLast);
                strcpy(sortArray[i].phoneNumber, pArray[i].phoneNumber);
                strcpy(sortArray[i].eMail, pArray[i].eMail);
                sortArray[i].DELETED=false;
            }


            exportTextFile (sortArray, elementsCounter);
        }
        break;
        }
        choice=getChoice();
    }
    cout<<"Program will now exit.";
    system ("pause");
    return 0;
}

int getChoice()
{
    int option;
    cout<<"[1] Open file"<<endl;
    cout<<"[2] Save file"<<endl;
    cout<<"[3] Save file as.."<<endl;
    cout<<"[4] Add entry"<<endl;
    cout<<"[5] Change entry"<<endl;
    cout<<"[6] Delete entry"<<endl;
    cout<<"[7] Search entry"<<endl;
    cout<<"[8] Show all entries"<<endl;
    cout<<"[9] Export to text file"<<endl;
    cout<<"[10] Exit"<<endl;
    cout<<"What would you like to do? ";
    cin>>option;
    while (option<0 || option>10 || !option )
    {
        //cout<<"Wrong input!"<<endl;
        //cout<<"What would you like to do? ";
        //cin.sync();
        cin.clear();
        cin.ignore();
        cin>>option;
    }
    return option;
}
Entry* openFile(Entry* fpBuffer,size_t fBufferSize, int &eleCount,const size_t resizeStep,string &filename)
{
    delete[] fpBuffer;
    Entry newEntry;
    Entry* pBuffer=new Entry[fBufferSize];
    size_t i=0;
    eleCount=0;
    cout<<"Enter filename: ";
    cin>>filename;
    ifstream file(filename.c_str(),ios::binary);
    if(!file.is_open())
    {
        cout << "Cannot open "<<filename<<"!";
        return NULL;
    }
    while(file.read((char*)&newEntry, sizeof(newEntry)))
    {

        i++;
        if (i>=fBufferSize)
        {
            pBuffer=resizeArrayNoCopy(pBuffer,fBufferSize, resizeStep);
        }
    }
    file.close();
    ifstream file2(filename.c_str(),ios::binary);
    while(file2.read((char*)&newEntry, sizeof(newEntry)))
    {

        pBuffer[eleCount]=newEntry;
        eleCount++;
    }
    cout<<"A total of "<<eleCount<<" elements read."<<endl;
    file2.close();
    return pBuffer;
}

void listEntries(Entry* fpBuffer, int elemCount)
{
    if (elemCount==0)
    {
        cout<<"There are no entries loaded into memory."<<endl;
        return;
    }
    for (int i=0; i<elemCount; i++)


    {
        cout<<i+1<<"."<<endl;
        cout<<"First name: ";
        cout<<fpBuffer[i].nameFirst<<endl;
        cout<<"Last name: ";
        cout<<fpBuffer[i].nameLast<<endl;
        cout<<"Phone number: ";
        cout<<fpBuffer[i].phoneNumber<<endl;
        cout<<"E-Mail: ";
        cout<<fpBuffer[i].eMail<<endl<<endl;
    }
}

void addEntry (Entry* fpBuffer, int &elemCount,size_t &fBufferSize,const size_t resizeStep)
{
    if (elemCount==fBufferSize)
    {
        fpBuffer = resizeArrayCopy(fpBuffer, resizeStep, fBufferSize);
        if (fpBuffer!=NULL)
        {
            cout<<"Adding entry number "<<elemCount+1<<endl;
            cout<<"First name: ";
            cin.sync();
            cin>>fpBuffer[elemCount].nameFirst;
            cout<<"Last name: ";
            cin>>fpBuffer[elemCount].nameLast;
            cout<<"Phone number: ";
            cin>>fpBuffer[elemCount].phoneNumber;
            cout<<"E-Mail: ";
            cin>>fpBuffer[elemCount].eMail;
            cout<<"Entry added successfully!"<<endl;
            elemCount++;

        }
        else
        {
            cout<<"Allocation failed!"<<endl;
            return;
        }
    }

    else
    {
        cout<<"Adding entry number "<<elemCount+1<<endl;
        cout<<"First name: ";
        cin>>fpBuffer[elemCount].nameFirst;
        cout<<"Last name: ";
        cin>>fpBuffer[elemCount].nameLast;
        cout<<"Phone number: ";
        cin>>fpBuffer[elemCount].phoneNumber;
        cout<<"E-Mail: ";
        cin>>fpBuffer[elemCount].eMail;
        cout<<"Entry added successfully!"<<endl;
        elemCount++;

    }
}



void changeEntry (Entry* fpBuffer, int elemCount)
{
    int changeOption;
    cout<<endl<<"Which entry would you like to change? (press 0 for main menu)"<<endl;
    cin>>changeOption;
    if (changeOption==0) return;
    while (changeOption>elemCount || changeOption<0 || !changeOption )
    {
        cout<<"Wrong input or entry number!"<<endl;
        cin.sync();
        cin.clear();
        cin.ignore();
        cin>>changeOption;
    }
    cout<<"Changing entry number "<<changeOption<<endl;
    cout<<"First name: ";
    cin>>fpBuffer[changeOption-1].nameFirst;
    cout<<"Last name: ";
    cin>>fpBuffer[changeOption-1].nameLast;
    cout<<"Phone number: ";
    cin>>fpBuffer[changeOption-1].phoneNumber;
    cout<<"E-Mail: ";
    cin>>fpBuffer[changeOption-1].eMail;
    cout<<"Entry changed successfully!"<<endl;
}

void deleteEntry (Entry* fpBuffer, int &elemCount)
{
    int deleteOption;
    cout<<"Which entry would you like to delete? (press 0 for main menu)"<<endl;
    cin>>deleteOption;
    while (deleteOption>elemCount || deleteOption<0 || !deleteOption)
    {
        cin.clear();
        cin.ignore();
        cin>>deleteOption;
    }
    if (deleteOption==0)
        return;
    for (int i=deleteOption; i<=elemCount; i++ )
    {
        strcpy(fpBuffer[i-1].nameFirst, fpBuffer[i].nameFirst);
        strcpy(fpBuffer[i-1].nameLast, fpBuffer[i].nameLast);
        strcpy(fpBuffer[i-1].phoneNumber, fpBuffer[i].phoneNumber);
        strcpy(fpBuffer[i-1].eMail, fpBuffer[i].eMail);
    }
    elemCount--;
    return;
}



Entry* resizeArrayCopy(Entry*& fpBuffer, const size_t resizeStep, size_t &bufferSize)
{
    Entry* pNewBuffer = new Entry[bufferSize + resizeStep];

    if(pNewBuffer == NULL)
    {
        return NULL;
    }

    for(size_t i = 0; i < bufferSize; i++)
    {
        //strcpy(pNewBuffer[i].nameFirst, fpBuffer[i].nameFirst);
        //strcpy(pNewBuffer[i].nameLast, fpBuffer[i].nameLast);
        //strcpy(pNewBuffer[i].phoneNumber, fpBuffer[i].phoneNumber);
       // strcpy(pNewBuffer[i].eMail, fpBuffer[i].eMail);
        pNewBuffer[i].DELETED=false;
        pNewBuffer[i]=fpBuffer[i];
    }

    //delete [] fpBuffer;
    bufferSize+=resizeStep;
    fpBuffer = pNewBuffer;
    return fpBuffer;
}


Entry* resizeArrayNoCopy (Entry*& fpBuffer, size_t& bufferSize,const size_t resizeStep )
{
    Entry* pNewBuffer=new Entry[bufferSize+resizeStep];
    if(pNewBuffer == NULL)
    {
        cout<<"Allocation failed!"<<endl;
        return NULL;
    }
    delete[] fpBuffer;
    fpBuffer=pNewBuffer;
    bufferSize+=resizeStep;
    return fpBuffer;
}
void saveFile (string filename, Entry* fpArray, int elementsCount)
{
    if (fpArray==NULL)
    {
        cout<<"You need to open a file first!"<<endl;
        return;
    }
    ofstream file(filename.c_str(),ios::binary);
    if(!file.is_open())
    {
        cout << "Cannot open "<<filename<<"!";
        return;
    }
    file.seekp(0, ios::beg);
    for (int i=0; i<elementsCount; i++)
    {
        file.write((char*)&fpArray[i],sizeof(fpArray[i]));
    }

    file.close();
}

void saveFileAs (string filename, Entry* fpArray, int elementsCount)
{
    char option;
    string saveAsFilename;
    if (fpArray==NULL)
    {
        cout<<"You need to open a file first!"<<endl;
        return;
    }
    cout<<"Enter a filename: ";
    cin>>saveAsFilename;
    ifstream file(saveAsFilename.c_str(),ios::binary);
    if (file.is_open())
    {
        cout<<endl<<"This file already exists, do you want to overwrite it?"<<endl;
        cout<<"Type 'y' to overwrite or anything else to return to main menu: ";
        cin>>option;
        if (option=='y'||option=='Y')
        {
            file.close();
            ofstream file2(saveAsFilename.c_str(),ios::binary);
            file2.seekp(0, ios::beg);
            for (int i=0; i<elementsCount; i++)
            {
                file2.write((char*)&fpArray[i],sizeof(fpArray[i]));
            }

            file2.close();

        }
        else
        {
            cout<<"Returning to main menu."<<endl;
            return;
        }

    }
    else
    {
        file.close();
        ofstream file2(saveAsFilename.c_str(),ios::binary);
        file2.seekp(0, ios::beg);
        for (int i=0; i<elementsCount; i++)
        {
            file2.write((char*)&fpArray[i],sizeof(fpArray[i]));
        }

        file2.close();
    }
}
void searchEntry (Entry* fpArray, int elemCount)
{
    char search[40];
    cout<<endl<<"Search for: ";
    cin>>search;
    for(int i=0; i<elemCount; i++)
    {
        if (strstr((char*)fpArray[i].nameFirst, (char*)search)!=NULL
                || strstr((char*)fpArray[i].nameLast, (char*)search)!=NULL
                || strstr((char*)fpArray[i].eMail, (char*)search)!=NULL
                || strstr((char*)fpArray[i].phoneNumber, (char*)search)!=NULL)
        {
            cout<<endl;
            cout<<"First name: ";
            cout<<fpArray[i].nameFirst<<endl;
            cout<<"Last name: ";
            cout<<fpArray[i].nameLast<<endl;
            cout<<"Phone number: ";
            cout<<fpArray[i].phoneNumber<<endl;
            cout<<"E-Mail: ";
            cout<<fpArray[i].eMail<<endl<<endl;
        }
    }
    cout<<endl;
}


void exportTextFile (Entry* fpArray, int elemCount)
{
    if (fpArray==NULL)
    {
        cout<<"You need to open a file first!"<<endl;
        return;
    }
    int option;
    char fileExport[20];
    cout<<"Enter filename to export to: ";
    cin>>fileExport;
    cout<<"How do you want to sort your entries? (enter 0 to return to main menu)"<<endl;
    cout<<"[1] By first name"<<endl;
    cout<<"[2] By last name"<<endl;
    cout<<"[3] By phone number"<<endl;
    cout<<"[4] By e-Mail address "<<endl;
    cout<<"Choice: ";
    cin>>option;
    while (option>4 || option<0 || !option )
    {
        cout<<"Wrong input or entry number!"<<endl;
        cin.sync();
        cin.clear();
        cin.ignore();
        cin>>option;
    }

    switch (option)

    {
    case 1 :
    {
        Entry temp;
        for(int i = 0; i < elemCount; i++)
        {
            for (int k=i; k<elemCount; k++)
            {
                if(strcmp(fpArray[i].nameFirst,fpArray[k].nameFirst) > 0)
                {
                    temp = fpArray[i];
                    fpArray[i] = fpArray[k];
                    fpArray[k] = temp;
                }
                exportText (fileExport, elemCount, fpArray);
            }
        }
    }
    break;
    case 2 :
    {
        Entry temp;
        for(int i = 0; i < elemCount; i++)
        {
            for (int k=i; k<elemCount; k++)
            {
                if(strcmp(fpArray[i].nameLast,fpArray[k].nameLast) > 0)
                {
                    temp = fpArray[i];
                    fpArray[i] = fpArray[k];
                    fpArray[k] = temp;
                }
                exportText (fileExport, elemCount, fpArray);
            }
        }
    }
    break;
    case 3 :
    {
        Entry temp;
        for(int i = 0; i < elemCount; i++)
        {
            for (int k=i; k<elemCount; k++)
            {
                if(strcmp(fpArray[i].phoneNumber,fpArray[k].phoneNumber) > 0)
                {
                    temp = fpArray[i];
                    fpArray[i] = fpArray[k];
                    fpArray[k] = temp;
                }
                exportText (fileExport, elemCount, fpArray);
            }
        }
    }
    break;
    case 4 :
    {
        Entry temp;
        for(int i = 0; i < elemCount; i++)
        {
            for (int k=i; k<elemCount; k++)
            {
                if(strcmp(fpArray[i].eMail,fpArray[k].eMail) > 0)
                {
                    temp = fpArray[i];
                    fpArray[i] = fpArray[k];
                    fpArray[k] = temp;
                }
                exportText (fileExport, elemCount, fpArray);
            }
        }
    }
    break;
    }

}

void exportText (string fileExport, int elemCount, Entry* fpArray)
{
    ofstream file(fileExport.c_str());
    file.seekp(0, ios::beg);
    for (int k=0; k<elemCount; k++)
    {
        file<<k+1<<"."<<endl;
        file<<"First name: "<<fpArray[k].nameFirst<<endl;
        file<<"Last name: "<<fpArray[k].nameLast<<endl;
        file<<"Phone number: "<<fpArray[k].phoneNumber<<endl;
        file<<"E-mail: "<<fpArray[k].eMail<<endl;

    }
    file.close();
    return;

}