October 6, 2002


********************************************************************************
                                CALL THIS FILE EFC.CPP
********************************************************************************
#include <iostream.h>
#include <iomanip.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include "helpers.cpp"

int main() {
char *sure7="k";
int choice;
DiskCheck();
cout<<"                 *****************************************\n"
	 <<"                 *****************************************\n"
	 <<"                 ***                                   ***\n"
	 <<"                 ***     ******   ******    *****      ***\n"
	 <<"                 ***     **   *   **   *   **   **     ***\n"
	 <<"                 ***     **       **       **          ***\n"
	 <<"                 ***     ****     ****     **          ***\n"
	 <<"                 ***     **       **       **          ***\n"
	 <<"                 ***     **   *   **       **   **     ***\n"
	 <<"                 ***     ******   **        *****      ***\n"
	 <<"                 ***                                   ***\n"
	 <<"                 *****************************************\n"
	 <<"                 *****************************************\n";

do { // MAIN LOOP BEGINS

int error;
do { // MENU CHOICE LOOP BEGINS
char *ChoiceC="aa", *lang1="Native", *lang2="Foreign";
error=0; cout<<"Enter your choice:"<<endl
			 <<"     0 -- help\n"
			 <<"     1 -- run "<<lang1<<"->"<<lang2<<" quiz\n"
			 <<"     2 -- run "<<lang2<<"->"<<lang1<<" quiz\n"
			 <<"     3 -- view a vocabulary file\n"
			 <<"     4 -- add vocabulary entries\n"
			 <<"     5 -- view the Guide file\n"
			 <<"     6 -- update numbers in the Guide file\n"
			 <<"     7 -- create an empty Guide file\n"
			 <<"     8 -- count all entries\n"
			 <<"     9 -- quit EFC\n";
			 cout<<"=> "; cin>>ChoiceC;
		 if (strlen(ChoiceC) > 1)
			  {cerr<<"\n     Error! Improper entry!\n\n";error=1; goto endMenuLoop;}
		 choice=TransC(ChoiceC[0]); cin.get();
endMenuLoop: } while (error==1);
// END OF MENU CHOICE LOOP

if (choice==0)	HelpMenu();

if (choice==1)
	{
	char * ch1="vocabXX.txt";

	ch1 = File();
	if (check(ch1)==1)
		{
		int size1, i1=0, randomnumber1=105, time1a, time1b, count1=0;
		char foreign1[36], native1[36], flag1;

		size1 = ChapterSize(ch1);
		cout<<"\nTo see the answer and to go to the next word hit ENTER.\n";
		cout<<"To quit enter 'q'.\n"; time1a=time(0); srand(time1a); cin.get();
		do
			{
			randomnumber1 = random(size1); i1=0;
			ifstream fromVocabFile1(ch1, ios::in);
			while (i1<=randomnumber1)
				{
				fromVocabFile1 >> foreign1 >> native1;	i1++;
				}
				flag1 = Quiz(native1, foreign1); count1++;
			fromVocabFile1.close();
			}
		while (flag1!='q'); time1b=time(0)-time1a;
		cout<<"\n\n\n\n\n\n\n\n"; QuizTime(time1b);
		cout<<"\n     Number of words is "<<count1<<".\n\n";
		cout<<"\n\n\n";
		}
	} // END OF CHOICE 1 OPTION;

if (choice==2)
	{
	char * ch2="vocabXX.txt";

	ch2 = File();
	if (check(ch2)==1)
		{
		int ChapterSize(char * );
		int size2, i2=0, randomnumber2=105, time2a, time2b, count2=0;
		char foreign2[36], native2[36], flag2;

		size2 = ChapterSize(ch2);
		cout<<"\nTo see the answer and to go to the next word hit ENTER.\n";
		cout<<"To quit enter 'q'.\n"; time2a=time(0); srand(time2a); cin.get();
		do
			{
			randomnumber2 = random(size2); i2=0;
			ifstream fromVocabFile2(ch2, ios::in);
			while (i2<=randomnumber2)
				{
				fromVocabFile2 >> foreign2 >> native2;	i2++;
				}
				flag2 = Quiz(foreign2, native2); count2++;
			fromVocabFile2.close();
			}
		while (flag2!='q'); time2b=time(0)-time2a;
		cout<<"\n\n\n\n\n\n\n\n"; QuizTime(time2b);
		cout<<"\n     Number of words is "<<count2<<".\n\n";
		cout<<"\n\n\n";
		}
	} // END OF CHOICE 2 OPTION;

if (choice==3)
	{
	char * ch3="vocabXX.txt", foreign3[35], native3[35], next3;
	int counter3, page3=1, size3;

	ch3=File();
		if (check(ch3)==1)
		{
		ifstream fromVocab3(ch3, ios::in); cin.get();
		do {
			cout<<endl; cout<<endl; size3 = ChapterSize(ch3);
			for (counter3=20*(page3-1); counter3<=20*page3-1; counter3++)
				{
				fromVocab3 >> foreign3 >> native3;
				outputVocab( counter3+1, foreign3, native3);
				}
				cout<<"\nTo see the next page hit ENTER. To quit enter 'q' -> ";
				next3=cin.get(); cout<<endl; page3++;
			}
		while (counter3 < size3 && next3 !='q');
		fromVocab3.close();
		}
	cout<<"\n\n\n\n\n\n\n\n\n\n\n\n";
	} // END OF CHOICE 3 OPTION;

if (choice==4)
	{
	char * ch4="vocabXX.txt", * sure4="a", foreign4[35], native4[35];
	int size4;
	ch4=File();
		if (checkNM(ch4)==1) size4=ChapterSize(ch4);
		else size4=0;
		cout<<"     This file has "<<size4<<" word(s) in it.";
		cout<<"\n     Enter a new word and its equivalent.";
		cout<<"\n     Leave a space between the words but no blanks within.\n";
		do
			{
			cout<<"\n     Enter 'y' to confirm, anything else to cancel. => ";
			cin>>sure4;
			if (sure4[0]=='y' && strlen(sure4)==1)
				{
				ofstream intoVocab4(ch4, ios::app);
				if (!intoVocab4)
					{
					cerr<<"\n\n\n     Could not open file.\n"
						 <<"     Make sure disk is not full or write protected.\n\n\n";
					goto end4;}
				entry:
				cout<<"<===============35================> ";
				cout<<"<===============35================>\n";
				cin>>foreign4>>native4;
				if (strlen(foreign4)>35 || strlen(native4)>35)
					{cerr<<"\n\n\n     Entries should not be longer than 35 symbols.\n\n\n";
					goto entry;}
				intoVocab4<<foreign4<<" "<<native4<<endl;
				intoVocab4.close();
				}
			} while (sure4[0]=='y' && strlen(sure4)==1);
		cout<<"\n\n\n\n\n\n\n\n\n\n\n\n\n";
		size4=ChapterSize(ch4);
		updateGuide(size4, ch4);
	end4:
	} // END OF CHOICE 4 OPTION

if (choice==5)
	{
	int chapter5, words5, counter5, page5=1;
	char descriptor5[60], next5;
	if (check("guide.txt") == 1)
		{cout<<endl;
		ifstream fromGuide5("guide.txt", ios::in);
		do {
			cout<<endl;
			for (counter5=20*(page5-1); counter5<=20*page5-1; counter5++)
				{
				fromGuide5 >> chapter5 >> descriptor5 >> words5;
				outputGuide( chapter5, descriptor5, words5);}
				cout<<"\n\nTo see the next page hit ENTER. To quit enter 'q' -> ";
				next5 = cin.get(); cout<<endl; page5++;
			}
		while (counter5 < 100 && next5 !='q');
		fromGuide5.close();
		cout<<"\n\n\n\n\n\n\n\n\n\n\n\n";
		}
	} // END OF CHOICE 5 OPTION

if (choice==6)
	{
	char * ch6="vocabXX.txt";
	int size6;

	for (int i6=0; i6<=99; i6++)
		{
		ch6[6] = TransD(i6%10); ch6[5] = TransD((i6 - i6%10)/10);
		(checkNM(ch6)==1 ? size6=ChapterSize(ch6) : size6=0);
		updateGuide(size6, ch6);
		}
	cout<<"\n\n\n\n\n\n\n\n\n\n\n\n\n";
	} // END OF CHOICE 6 OPTION

if (choice==7)
	{
		cout<<"\n     Enter 'y' to confirm, anything else to cancel. => ";
		cin>>sure7;
		if (sure7[0]=='y' && strlen(sure7)==1)
		{
			ofstream intoGuide7("guide.txt", ios::out);
			char * text7="empty.file..................................................";
			int words7=0;
			for (int i7=0; i7<=99; i7++) {intoGuide7<<i7<<" "<<text7<<" "<<words7<<endl;}
			intoGuide7.close();
		} end7: cout<<"\n\n\n\n\n\n\n\n\n\n\n\n\n";
	} // END OF CHOICE 7 OPTION

if (choice==8)
	{
	int total8 = 0;
	char *ch8="vocabXX.txt";
	for (int i8=0; i8<=99; i8++)
		{
			 ch8[6] = TransD(i8%10); ch8[5] = TransD((i8 - i8%10)/10);
			 total8 = total8 + (checkNM(ch8)==1 ? ChapterSize(ch8) : 0) ;
		}
		cout<<"\n\n\n\n\n";
		cout<<"\n     The total number of entries is "<<total8<<".\n\n";
		cout<<"\n\n\n\n\n";
	}

} while (choice!=9); // MAIN LOOP ENDS

cout<<"\n\n\n\n\n\n\n\n\n\n\n\n"
"                            EFC says Good-bye!"
"\n\n\n\n\n\n\n\n\n\n\n\n";
return 0;}
********************************************************************************
                                CALL THIS FILE HELPERS.CPP
********************************************************************************
//TransC FORMS A CHARACTER INTO A DIGIT
int TransC (char symbol) {
	int cap;
	switch (symbol) {
	case '1' : cap=1; break;
	case '2' : cap=2; break;
	case '3' : cap=3; break;
	case '4' : cap=4; break;
	case '5' : cap=5; break;
	case '6' : cap=6; break;
	case '7' : cap=7; break;
	case '8' : cap=8; break;
	case '9' : cap=9; break;
	case '0' : cap=0; break;
	default: cap=12; break;}
	return cap;
}

//TransD FORMS A DIGIT INTO A CHARACTER
char TransD (int digit) {
char cap; switch (digit) {
		  case 1 : cap='1'; break;
		  case 2 : cap='2'; break;
		  case 3 : cap='3'; break;
		  case 4 : cap='4'; break;
		  case 5 : cap='5'; break;
		  case 6 : cap='6'; break;
		  case 7 : cap='7'; break;
		  case 8 : cap='8'; break;
		  case 9 : cap='9'; break;
		  case 0 : cap='0'; break; }
return cap;
}

// Chooses which file descriptor in the Guide to be edited
// returns an INTEGER!
int Guide()
{
	char ChoiceFile[70], temp1, temp2;
	int chapter;
	endGuide: cout<<" "<<"Which file (0 - 99)? ";
	cin>>ChoiceFile;
	if (strlen(ChoiceFile) > 2)
		{cerr<<"\n     Error! Improper entry!\n\n"; goto endGuide;}
	if (strlen(ChoiceFile)==1) {temp1='0'; temp2=ChoiceFile[0];}
	else {temp1=ChoiceFile[0]; temp2=ChoiceFile[1];}
	if (TransC(temp1)==12 || TransC(temp2)==12)
		{cerr<<"\n     Error! Improper entry!\n\n"; goto endGuide;}
		chapter=10*TransC(temp1)+TransC(temp2);
		cout<<"\n     You selected "<<chapter<<".\n"<<endl;
	return chapter;
}

// Routine for choosing a Vocabulary File
// returns a STRING!
char * File()
{
	char ChoiceFile[70], * chapter="vocabXX.txt", temp1, temp2;
	endFile: cout<<"Which file (0 - 99)? "; cin>>ChoiceFile;
	if (strlen(ChoiceFile) > 2)
		{cerr<<"\n     Error! Improper entry!\n\n"; goto endFile;}
	if (strlen(ChoiceFile)==1) {temp1='0'; temp2=ChoiceFile[0];}
	else {temp1=ChoiceFile[0]; temp2=ChoiceFile[1];}
	if (TransC(temp1)==12 || TransC(temp2)==12)
		{cerr<<"\n     Error! Improper entry!\n\n"; goto endFile;}
		chapter[5]=temp1; chapter[6]=temp2;
		cout<<"\n     You selected "<<chapter<<".\n"<<endl;
	return chapter;
}

// CHECKING IF FILE EXISTS WITHOUT AN ERROR MESSAGE
#include <fstream.h>
int checkNM(char * file) {
int result; fstream test(file, ios::in);
if (!test) result=0; else result=1;
return result;}

// CHECKING IF FILE EXISTS WITH AN ERROR MESSAGE
int check(char * file)
{
	int checkNM(char * file);
	int result;
	result=checkNM(file);
	if (result==0) {cout<<"\n     I/O Error! File does not exist.\n\n";}
	return result;
}

// DISPLAYS A QUIZ - SHOWS ONE WORD AND AFTER 'ENTER' ANOTHER
char Quiz(char * Word1, char * Word2)
{
	char flag; cout << Word1 <<" "; flag = cin.get();
	cout <<"                                " << Word2 << endl;
	return flag;
}

// DISPLAYS TIME
void QuizTime(int time)
{
	int minutes, seconds;
	minutes = time / 60; seconds = time % 60;
	cout<<"\n     Quiz time is "<<minutes<<" minutes and "
	<<seconds<<" seconds (or "<<time<<" seconds)."; return;
}

// DISPLAYS AN ENTRY FROM THE GUIDE FILE
void outputGuide( int whichChapter, char whatChapter[60], int howMany)
{
	cout<<setiosflags(ios::left)
	<<setw(5)<<whichChapter
	<<setw(61)<<whatChapter
	<<resetiosflags(ios::right)
	<<setiosflags(ios::fixed | ios::showpoint)<<howMany<<endl;
}

// DISPLAYS AN ENTRY FROM THE VOCABULARY FILE
void outputVocab( int index, const char * ForeignWord, const char * NativeWord)
{
	cout<<setiosflags(ios::left)<<setw(5)<<index
	<<setw(36)<<ForeignWord
	<<setw(36)<<resetiosflags(ios::right)
	<<setiosflags(ios::fixed | ios::showpoint)<<NativeWord<<endl;
}

// CALCULATES THE SIZE OF THE VOCABULARY FILE
int ChapterSize(char * file)
{
	ifstream inFile(file, ios::in);
	int i=0;
	char ForeignWord[35], NativeWord[35];
	while (!inFile.eof())
		{inFile>>ForeignWord>>NativeWord; i++;}
	inFile.close();
	return (i-1);
}

// PROMPT FOR A HELP SYSTEM MENU
void HelpMenu() {char more;
cout<<"\n\n\n\n          HELP SYSTEM FOR ELECTRONIC FLASHCARDS (EFC 2002.9)\n\n";
cout<<"\nEFC operates with vocabulary files which are located"
<<"\nin the same directory as the EXE file itself, and are"
<<"\ncalled vocab00.txt, vocab01.txt, ... vocab99.txt."
<<"\n\nEach file can contain 'infinity' of entries (a word/sentence"
<<"\nin one language and its translation in another)."
<<"\n\nYou can add vocabulary entries using EFC."
<<"\nTo edit or delete entries, open vocabulary files using Notepad."
<<"\n\n\n\n\n\n\n\n\n"
<<"\nTo see the next page hit ENTER. To quit enter 'q' -> ";
more = cin.get(); if (more=='q') goto endhelp;
cout<<"\n\n\n          HELP SYSTEM FOR ELECTRONIC FLASHCARDS (EFC 2002.9)\n";
cout<<"\n\nEach vocabulary file is structured as follows:\n"
<<"\na.word.in.Foreign.Language a.word.in.Native.Language"
<<"\na.word.in.Foreign.Language a.word.in.Native.Language"
<<"\na.word.in.Foreign.Language a.word.in.Native.Language"
<<"\n                                      <---EMPTY LINE"
<<"\n\nAs long as you maintain the structure of the file, the"
<<"\nprogram will function properly. The length of each entry"
<<"\ncannot exceed 35 symbols."
<<"\n\nAn entry in Foreign Language is separated from an entry "
<<"\nin Native Language by a space symbol. Because of that"
<<"\nthere can be no spaces, tabulations, etc within the entries."
<<"\nYou may use underscores or dots in order to separate the"
<<"\nwords."
<<"\n\n"
<<"\nTo see the next page hit ENTER. To quit enter 'q' -> ";
more = cin.get(); if (more=='q') goto endhelp;
cout<<"\n\n\n          HELP SYSTEM FOR ELECTRONIC FLASHCARDS (EFC 2002.9)\n";
cout<<"\n\nEFC also creates a guide file (guide.txt) which contains"
<<"\ninformation about the vocabulary files such as a description"
<<"\nof a topic for the words within it and the number of them:\n"
<<"\n0 empty.file                                         0"
<<"\n1 family                                             271"
<<"\n2 apartment                                          104"
<<"\n3 shopping                                           101"
<<"\n..."
<<"\n\nThe length of a descriptor cannot exceed 60 symbols and"
<<"\ncannot contain space, tabulation or other similar symbols."
<<"\n\nNote that the guide file automatically updates the"
<<"\nnumber of entries if you are editing vocabulary files using"
<<"\nEFC, but not if you are using an outside editor."
<<"\n\n\nTo see the next page hit ENTER. To quit enter 'q' -> ";
more = cin.get(); if (more=='q') goto endhelp;
cout<<"\n\n\n\n          HELP SYSTEM FOR ELECTRONIC FLASHCARDS (EFC 2002.9)\n"
<<"\n\nEFC allows you to run quizes in both directions (from"
<<"\nNative Language to Foreign and vice versa)."
<<"\n\nIt randomly picks the entries from a selected file"
<<"\nand displays them on the screen. Pressing ENTER allows"
<<"\nyou to see a translation and go to the next word."
<<"\nPressing 'q' terminates the quiz and displays time spent"
<<"\non it."
<<"\n\nYou can download EFC from "
<<"\n            http://www.econ.jhu.edu/people/tchaidze/efc."
<<"\nIf you have any comments, questions, or suggestions email "
<<"\n            robert@jhu.edu."
<<"\n"
<<"\n\n\n\n\nHit ENTER. -> ";cin.get();
endhelp: cout<<"\n\n\n\n\n\n\n\n\n\n\n\n\n"; return;}
// END OF HELP SYSTEM

// EDITS AN ENTRY IN THE GUIDE FILE VIA TEMPORARY FILE
void updateGuide(int size, char * chapter)
{
	int ChapterNumber, i=0, number, words;
	char Descriptor[60];
	ofstream intoTemp("temp.txt", ios::out);
	ifstream fromGuide("guide.txt", ios::in);

	ChapterNumber = 10*TransC(chapter[5])+TransC(chapter[6]);
	while (i<ChapterNumber)
		{
		fromGuide>>number>>Descriptor>>words;
		intoTemp<<number<<" "<<Descriptor<<" "<<words<<endl;
		i++;
		}
	fromGuide>>number>>Descriptor>>words;
	intoTemp<<i<<" "<<Descriptor<<" "<<size<<endl;
	i++;
	while (i<=99)
		{
		fromGuide>>number>>Descriptor>>words;
		intoTemp<<number<<" "<<Descriptor<<" "<<words<<endl;
		i++;
		}
	fromGuide.close();
	intoTemp.close();

	ofstream intoGuide("guide.txt", ios::trunc);
	ifstream fromTemp("temp.txt", ios::in);

	i=0;
	while (i<100)
		{
		fromTemp>>number>>Descriptor>>words;
		intoGuide<<number<<" "<<Descriptor<<" "<<words<<endl;
		i++;
		}
	fromTemp.close();
	intoGuide.close();

	ofstream killingTemp("temp.txt", ios::trunc);
	killingTemp<<"THIS FILE WAS CREATED FOR TEMPORARY USE.";
	killingTemp<<"\nYOU CAN SAFELY DELETE IT.";
	killingTemp.close();
	if( remove( "temp.txt" ) == -1 )
		cerr<<"\n\n     Error deleteing temp.txt. Please remove file manually.\n\n";
return;
}

// CHECKING IF DISK IS WRITE PROTECTED
void DiskCheck (void)
{
	ofstream intoTemp("temp.txt", ios::out);
	if (!intoTemp)
		{
		cerr<<"\n\n\n"
			 <<"      WARNING:\n"
			 <<"      Disk is either full or write-protected!!!\n\n\n"
			 <<"      You will still be able to view files and run quizes,\n"
			 <<"      but not to add words to vocabulary files or\n"
			 <<"      update the vocabulary guide file.\n\n\n"
			 <<"      Hit ENTER to continue -> "; cin.get();
		}
	else
		{
		intoTemp<<"THIS FILE WAS CREATED FOR TEMPORARY USE.";
		intoTemp<<"\nYOU CAN SAFELY DELETE IT.";
		if( remove( "temp.txt" ) == -1 )
		cerr<<"\n\n     Error deleting temp.txt. Please remove file manually.\n\n";
		}
return;
}