QuizBuddyMain.c

/*
@brief QuizBuddy 1.1

Programmed By  

@author Sushant Gautam (544,2071)
( http://sushant.info.np
susant.gautam@gmail.com)   
With Sishir Bhandari
@date 2016
For TU IOE BCT First Semester Project
 
(c) With Developers 
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <windows.h>
#include <string.h>
#include <time.h>
///Setting minimum value to 1; used in random number generation range.
#define minV 1  
///Setting number of maximum words to 512; this is used for URLs.
#define MAX_LINE 512 
 ///Integer array to store 100 unique random numbers in a range generated by RandomNumber function.
int RandArray[100];
///@brief Function to return a unique random number not present in array 'RandArray[100]' in a range value passed :
int RandomNumber(int, int); 
///@brief Function to Start Quiz :
int QuizStart(int); 
///@brief Function to scan data from question database with correct  answer as return value :
int datascanner(int);
///@brief This function calls the About section of the program :
void about(void); 
///@brief Calls the WIN API to download the file. It uses global string variables 'url' and 'destination'. So these values should be set first before function call :
int download(void); 
///@brief This function shows all quiz results from database :
void printQuizData(void);
///@brief This function edits  personal information record of user:
char UserRecord(void); 
///@brief This funcction displays personal information record of user:
void viewprofile(void);
///@brief This function takes the user to preferences  section to change the program preferences :
void settings(void); 
///@brief This function allows user to select different quiz database. This function is followed by download() function that downloads the selected database from internet :
int QuizSelect(void); 
///@brief This function prepares new files and database for first time users :
int firstrun(); 
///@brief This function finds the number of lines in a database for passed filename as string value :
int findnOfQsnInDatabase(char[]); 
///@brief Display HomeScreen with diffrent options for user to choose :
int HomeScreen(); 
///@brief Let user review their answers after  finishing quiz:
int QuizReview();
///@brief Prints Progress Graph for user performance:
int PrintProgressGraph();
///@brief Print Graph for user performance according to answering speed:
void PrintSpeedGraph();
///@brief Calculates the data for result analysis:
void CalculateResult();
///@brief Finds the number of times the user has taken quiz:
int NumberOfQuizTaken();
///@brief Find the name of database in use:
void findDataBasename(void);
/// @brief Reset Question number variable to zero:
int QsnNumbr=0;
/// @brief Reset marks variable to zero.
int  Marks=0; 
///@brief Download Url variable used by download() function.
char url[MAX_LINE]; 
///@brief Download destination variable used by download() function.
char destination[MAX_LINE]; 
///@brief String variable to store temporary data during file reading .
char str[512];
///@brief Structure to hold user informations. This structure is saved to record file and data is retrieved on next program start.
    struct UserRecSt {
    	char name[20];
    	int age;
    	char address[20];
    	char collegename[20];
    	char preparingfor[20];
    	char mobilenum[20];
    	int nOfQsns;
    	int timeForeachQuestion;
    	char QuizType[30];
		int lastQuizPerc;
		int numberofQuizTaken; 	} 
		/// Structure variable for UserRecSt. This structure is saved to record file and data is retrieved on next program start.
		data;
///@brief Structure to hold user performance informations. 
	struct UserResultAnalysis{
		int averageprcnt;
		int highestPrcntg;
		float lowestTimeperQsn;
			}  
	/// Structure variable for UserResultAnalysis. This structure holds user performance informations
			analysis;
///@brief Structure to hold values of question and answers along with correct answer while using QuizStart();
struct resultData {
		char qsn[200];
    	char ans1[100];
    	char ans2[100];
    	char ans3[100];
    	char ans4[100];
    	char corans;
    	char userans;
    	 } 
///Structure variable for resultData to hold values of question and answers along with correct answer while using QuizStart();
		 result[100];
///@brief Structure to hold the values of data retrieved from result database. 
 struct ResultFromdataStr {
 		int nOfQsns;
    	int Marks;
    	float times;
    	char date[20];
    	char time[20];
///Structure variable for ResultFromdataStr to  hold the values of data retrieved from result database. 
    	 } 
///Structure variable for ResultFromdataStr to hold the values of data retrieved from result database. 
		 RsltFrmdtaStr[99999];

int main()
{
///Create QBcache folder and hide it. NO 
  system("@attrib +r +a +s +h QBcache /s /d");
  system("@mkdir QBcache");
 
///If false Display Loading screen.
		 system("@title QuizBuddy- loading. . ."); system("@color cf"); system("@cls");    
    printf("\n\n\n\t\t\tQuizBuddy v 1.1\n\n\n\t\t         Developed By : \n \n\t     Sushant Gautam - susant.gautam@gmail.com \n \n\t\t         Sishir Bhandari \n \n\t\t TU IOE BCT 2016 (1st Sem. Project) \n \n\t\t       (c) with Developers. \n \n\t\t       www.sushant.info.np \n");
        printf("\n\n\n\t\t\tLoading..."); sleep(1);
        printf(".....");sleep(1);
        printf("...");sleep(1);
    sleep(1);
    system("@cls");
    ///Check if record file for user information exists or not.
    FILE *userrec = fopen("QBcache/tdrsu.QBcache", "r");
    if (userrec == NULL) 
    {	///If file doesn't exist, call UserRecord() to edit user profile.
    	data.nOfQsns=10;
    	UserRecord();
    } 
    ///If file exists, read the data to structure.
    fread(&data, sizeof(data),1,userrec);
    fclose(userrec);
    
    ///Call to HomeScreen() Function.
		HomeScreen(); 
}

int HomeScreen() 
{
	///Hide QbCache folder.
    system("@attrib +r +a +s +h QBcache /s /d");  
    system("@title QuizBuddy"); system("@color fc"); system("@cls"); 
	 printf("\n\t\t\tWelcome to QuizBuddy \n\t\t\t __________________\n");
   printf("\n\t\t   %c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c\n", 0Xc9, 0Xcd, 0Xcd,0Xcd, 0Xcd,0Xcd,0Xcd,0Xcd,0Xcd,0Xcd, 0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0xbb);

    ///Find the name of database in use using findDataBasename().
	findDataBasename();
	///Set the time for each question to 30 second.
	data.timeForeachQuestion=30;
		///Display main menu along with user data.
    printf("\n \t\t   %c Start Quiz \t Press 1 %c\n\n \t\t   %c Preferences \t Press 2 %c\n\n \t\t   %c Profile / Results \t Press 3 %c\n\n \t\t   %c About \t\t Press 4 %c\n\n \t\t   %c Exit  \t\t Press 5 %c\n",0Xba,0Xba ,0Xba ,0Xba ,0Xba,0Xba,0Xba,0Xba,0Xba,0Xba  );
    printf("\n\t\t   %c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c", 0xc8, 0Xcd, 0Xcd,0Xcd,0Xcd,0Xcd,0Xcd,0Xcd, 0Xcd,0Xcd, 0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0Xcd,  0xbc);

		printf("\n\n \t User: %s ", data.name);
	printf("\t\t Preparing for : %s ", data.preparingfor);
	printf("\n\n \t\t\t  Quiz Selected : %s\n", data.QuizType);
	///Set the number of quiz taken  to the return value of function NumberOfQuizTaken().
	data.numberofQuizTaken=NumberOfQuizTaken(); 
	if(data.numberofQuizTaken>=99999) 
	{ 
	system("cls");
	printf("\n\n\tYou are exceeded the number of Quizzes ");
	printf("\n\t\tthat QuizBuddy is programmed to handle.");
	printf("\n\n\tPress Y To RESET your result database or any key to exit.\n");
	char tmp=getch();
	if ((tmp=='y')||(tmp=='Y'))
	{
remove("QBcache/bdtsr.QBcache");
printf("\n\n\tResult Cleared!!\n");
data.lastQuizPerc=0;
   sleep(2);
		main();
	}
	sleep(2);
	   printf("\n\n\tBye Bye.. . .. \n");
	exit(0);
	}
	///Call the CalculateResult() to calculate user data from database.
	CalculateResult();
		printf("\t %d Quiz(zes) Taken ", data.numberofQuizTaken);		
				if((analysis.averageprcnt>0)&&(analysis.averageprcnt<=100)) 	{
				printf("\t\t Average Percentage: %d", analysis.averageprcnt);
				}
				
/// Get User Input in HomeScreen
    char WlcmScrnKy=getch();
    ///Check for User Input using Switch.
    switch(WlcmScrnKy)
	{case '1':  /// If 1, reset Question number and marks & Call the QuizStart() Function
		{fflush(stdin);	system("@cls");	QsnNumbr=0 ,  Marks=0;	QuizStart(data.nOfQsns); break; }
	case '2' : 	/// If 2, call the settings() function.
		settings();
		FILE *userrec = fopen("QBcache/tdrsu.QBcache", "wb");
       fwrite(&data, sizeof(data),1,userrec);
    fclose(userrec);
		printf("\n\n\t%d Questions selected",data.nOfQsns );
	sleep(1);	HomeScreen();
		/// If 3, call the viewprofile().
	case '3' :  	viewprofile(); 
	/// If 4, print about section via about().
	case '4' :  about()	;
	///If 5, exit QuizBuddy with goodbye message.
	case '5' : 
	{
	system("@cls");
	system("@title QuizBuddy	--	Exit");
	printf("\n\n\t\tBye Bye. ..  . .\n");
	printf("\t\tSee You Back Soon :) . ..  . .\n");
		sleep(2);
		exit(0);
			} 
			///By Default, Call HomeScreen() function for any other keys pressed.
	default : system("@cls"); HomeScreen();	; 
	}	
}

int QuizStart(int nOfQsns)
{
	/// Find no of question in database by counting number of lines; calling nOfQsnInDatabase() function.
int nOfQsnInDatabase= findnOfQsnInDatabase("QBcache/btd.QBcache")-2;
///Start Timer
       clock_t qTimerStart = clock(); 
int i; int timeup;
for (i=0; i<(nOfQsns-1); i++)
	{result[i].userans='0';
	result[i].corans=0;
	}
   QsnNumbr=0; char get;
while((get!='q')&&(get!='Q'))
{
	system("cls");
	///Call the datascanner() with the random value from return of RandomNumber(), which lies in the range specified.
	RandArray[QsnNumbr]=(RandomNumber(nOfQsnInDatabase,QsnNumbr)+2);
	if (result[QsnNumbr].corans==0) result[QsnNumbr].corans=datascanner(RandArray[QsnNumbr]);
	///Print the Quiz Questions and answers.
	printf("\n\t\t    QuizBuddy -- Quiz Running \n");
printf("\n\t Question number: %d\t Number of Questions: %d\tTime: %.2fs\n\t\t___________\n", QsnNumbr+1, nOfQsns, (double)(clock() - qTimerStart) / CLOCKS_PER_SEC );	
if (((double)(clock() - qTimerStart) / CLOCKS_PER_SEC )>= data.timeForeachQuestion*data.nOfQsns) {  timeup=1; break;}
	printf("\n\t %s\n", result[QsnNumbr].qsn);
		printf("\n\t Option 1: %s\n", result[QsnNumbr].ans1);
			printf("\n\t Option 2: %s\n", result[QsnNumbr].ans2);
				printf("\n\t Option 3: %s\n", result[QsnNumbr].ans3);
					printf("\n\t Option 4: %s\n", result[QsnNumbr].ans4);
			 			printf("\n\t Your Answer: %c\n",  result[QsnNumbr].userans);
						 	 printf("\n\t\t___________\n\n\t PRESS 1,2,3,4 to CHANGE answer.\n\t PRESS a and d to NAVIGATE and PRESS O to SUBMIT answers.");
///Ask user inpur for correct answer.
char get=getch();
///Continuously Check for system time change comparing the take at beginning and at present.
if (((double)(clock() - qTimerStart) / CLOCKS_PER_SEC )<0) 
{
system("cls");
 printf("\n\tFraud Detected!\n\t________________\n\n\tSystem Time Changed !!\n\tWe don't entertain that. :p \n\n\tBe fair next time %s .\n\tExiting QuizBuddy. . .. ", data.name);
 sleep(3);
 ///If system time change detected, exit quiz showing fraud message.
exit(0);
  } 
if ((get=='d')||(get=='D')) QsnNumbr++;
if ((get=='a')||(get=='A')) QsnNumbr--;
if ((get=='q')||(get=='Q')) break;
if ((get=='0') ||(get=='o')||(get=='O')) break;
///Change the answer storing variable in result structure as per user answer.
if (get=='1') {result[QsnNumbr].userans='1'; QsnNumbr++;}
if (get=='2') {result[QsnNumbr].userans='2'; QsnNumbr++;}
if (get=='3') {result[QsnNumbr].userans='3'; QsnNumbr++;}
if (get=='4') {result[QsnNumbr].userans='4'; QsnNumbr++;}
if (QsnNumbr>nOfQsns-1) QsnNumbr--;
if (QsnNumbr<0) QsnNumbr++ ; 
system("cls");
}
	system("cls");
	printf("\n\t\tQuiz Completed\n\t\t___________\n");
	printf("\n\t\tSubmitting Answer. . \n");
sleep(2);  

   /// Stop Timer
          clock_t qTimerEnd = clock();
          if (timeup==1) { system("cls"); printf("\n\t\tYou ran out of time. Be quick on next quiz. %s.\n", data.name);printf("\n\t\tGood Luck!!\n", data.name); sleep(4); qTimerEnd= qTimerStart+data.timeForeachQuestion*data.nOfQsns ; }

		  	for (i=0; i<(nOfQsns-1); i++)
		  	/// Check for correct answers and write update marks.
	{if (result[i].corans==result[i].userans) Marks++;
	}

    /// After finishing Asking Questions - Write Output to Data File
    FILE *ResultData;
  ResultData = fopen("QBcache/bdtsr.QBcache", "a");
  if(ResultData == NULL) { ResultData= fopen("QBcache/bdtsr.QBcache", "wb");  }  /// If file does not exist, create it
 ///Display the result overview to user.
 system("@cls");    
 printf("\n\n \t RESULT\n\t__________________________\n\t__________________________\n\n");
printf("\tYou made %i out of %i questions correctly\n", Marks,nOfQsns) ;   
printf("\tYou Took %.0f seconds to complete.\n", (double)(qTimerEnd - qTimerStart) / CLOCKS_PER_SEC);   
printf("\tYour Accuracy Percentage: %d \n", (Marks*100/nOfQsns));  
printf("\tYou answered one question in around %.0f second(s) on average. \n", (double)(qTimerEnd - qTimerStart) / (CLOCKS_PER_SEC*nOfQsns)); 
	if ((Marks*100/nOfQsns)>analysis.highestPrcntg) printf("\n\tHIGHEST RECORD!!\n");
		else if ((Marks*100/nOfQsns)>analysis.averageprcnt) printf("\n\tYou did better than your average records.\n");
		printf("\n\t__________________________\n\t");
		///Calculate and Write percentage to structure variable data.
data.lastQuizPerc=(Marks*100/nOfQsns);
/// Write result to Data File.
fprintf(ResultData,"%d\t%d\t%f\t%s\t%s\n",nOfQsns ,Marks,((double)(qTimerEnd - qTimerStart) / CLOCKS_PER_SEC),__TIME__, __DATE__);
fclose(ResultData);
printf("\n\t%s\t%s\n",__DATE__,__TIME__);


	  ///Call the QuizReview() function to review the quiz after submission.
printf("\n\n\n\t Press any key for QuizReview . . . \n\t Press q to skip  QuizReview.");
 ///Prompt for user character input.
 char tmp = getch();
if ((tmp=='q')||(tmp=='Q')) {HomeScreen(); }
      ///Goto HomeScreen() if user selects the respective option.
      //Call the QuizReview() function and then PrintProgressGraph(); 
      data.numberofQuizTaken=NumberOfQuizTaken(); 
      QuizReview();
      PrintProgressGraph();
  }

int  QuizReview()
{
	int i=0, nOfQsns= data.nOfQsns;  char get;
	while((get!='q')&&(get!='Q')&&(i>=0)&&(i<nOfQsns))
{
	///Prints the Questions, Options, Correct answers and your inputs for respective question during the last quiz.
	system("cls");
	printf("\n\t\tQuiz Review\n\t\t___________\n");
printf("\n\t Question: %d of %d \t Percentage: %d\n", i+1,data.nOfQsns, data.lastQuizPerc);	
	printf("\n\t %s\n", result[i].qsn);
		printf("\n\t Option 1: %s\n", result[i].ans1);
			printf("\n\t Option 2: %s\n", result[i].ans2);
				printf("\n\t Option 3: %s\n", result[i].ans3);
					printf("\n\t Option 4: %s\n", result[i].ans4);
			 			printf("\n\t  Correct Answer: %c\t\t Your Answer: %c\n", result[i].corans, result[i].userans);	
						 	 if 	(result[i].corans==result[i].userans)	{printf("\n\tYou answered correctly.\n\t\t___________\n"); system("@color A9");}
							 	else if (result[i].userans=='0') {printf("\n\tNo answer was chosen.\n\t\t___________\n"); system("@color F3");
								 }	
							 	else 	{printf("\n\tYou answred wrong.\n\t\t___________\n");
							 	system("@color 0B");
								 }
							 	printf("\n\tUse a and d to navigate and 'q' to quit review."); 
							 	///Prompt the user character input for navigating through questions or exit.
get=getch();
system("cls");
if ((get=='a')||(get=='A')) i--;
if ((get=='d')||(get=='D')) i++;
///Exit for respective user input.
if ((get=='q')||(get=='Q')) break;
if (i>nOfQsns-1) i--;
if (i<0) i++;
}
	printf("\n\t\tQuiz Review\n\t\t___________\n");
	printf("\n\t\tReview Completed. .  \n");
	 return 0;     
}


    int    datascanner(int line)
{
    int end, loop;
    char str[512];
    FILE *database = fopen("QBcache/btd.QBcache", "r");
    if (database == NULL) 
    {
    	///If file opening fails goto firstrun() function to reset files.
        firstrun();
        HomeScreen();
    } 
    for(end = loop = 0;loop<line;++loop){
        if(0==fgets(str, sizeof(str), database)){    
            end = 1;
            break;
        }
    }
  
char CrectAnswer;
CrectAnswer=str[(strlen(str)-2)];             
    fclose(database);
      
    
     int sort[100];  
int i=0,j=0;
for (; i<1000; i++)
{
if (str[i] =='$') 
{
sort[j]=i; j++;
}
}
///Sort questions and options from file.
char QuestionID[10], Question[1000], Op1[300], Op2[300], Op3[300], Op4[300]; 
strncpy(QuestionID, str + 0, sort[0] - 0);  QuestionID[sort[0]]='\0';
strncpy(Question, str+ sort[0] , sort[1] - sort[0]);  Question[sort[1] - sort[0]]='\0';
strncpy(Op1, str + sort[1], sort[2] - sort[1]);  Op1[sort[2] - sort[1]]='\0';
strncpy(Op2, str + sort[2], sort[3] - sort[2]);  Op2[sort[3] - sort[2]]='\0';
strncpy(Op3, str + sort[3], sort[4] - sort[3]);  Op3[sort[4] - sort[3]]='\0';
strncpy(Op4, str + sort[4], sort[5] - sort[4]);  Op4[sort[5] - sort[4]]='\0';
QuestionID[0]=' '; Question[0]=' '; Op1[0]=' '; Op2[0]=' '; Op3[0]=' '; Op4[0]=' '; 
///Set string values for question and options in structure variable.
strcpy(result[QsnNumbr].qsn,Question);
strcpy(result[QsnNumbr].ans1,Op1);
strcpy(result[QsnNumbr].ans2,Op2);
strcpy(result[QsnNumbr].ans3,Op3);
strcpy(result[QsnNumbr].ans4,Op4);
result[QsnNumbr].corans=CrectAnswer;

///Return correct answer value.
       if (CrectAnswer=='1') return '1';
    if (CrectAnswer=='2') return '2';
     if (CrectAnswer=='3') return '3';
      if (CrectAnswer=='4') return '4';
}

void settings(void)
{		//Get and check User Input for displayed preferences.
	system("@cls");
	system("@color fd");
	system("@title QuizBuddy -- Preferences ");
	printf("\n\t\tNumber of Questions Selected : %d\n\t\tAverage Time for each question: %d seconds.", data.nOfQsns, data.timeForeachQuestion);
	printf("\n\n\t\tPreferences\n\t\t______________\n");
		printf("\n\t\tSelect Exam Type:\n\t\t1. 10 Questions\n\t\t2. 50 Questions\n\t\t3.100 Questions\n\n\t\t4. UpdateQuestionDatabase\n\t\t5. Quiz Selection\n\t\t6. Update QuizBuddy Program\n\t\t7. Reset Result Data");
	char settingType=getch();
    switch(settingType)
    ///If 1,2 or 3 Set no of question value acccording to option selected by user.
        	{case '1':  
	data.nOfQsns=10 ; break; 
	case '2' : 	data.nOfQsns=50; break;
	case '3' : data.nOfQsns=100; break;
	///If 4, goto firstrun() .
	case '4' : firstrun(); break;
	///If 5 goto QuizSelect() .
	case '5' : QuizSelect(); break;
		///If 6 set url and destination to update program and call the download() .
	case '6' :   {
	 	strcpy(url,""); strcpy(destination,""); strcpy(url,"https://drive.google.com/uc?export=download&id=0B5iGbzCnc7P7WE1zNTVoUGV5SlE");
		strcpy(destination,"QuizBuddyUpdated.exe");
	    if (download()==0) 	HomeScreen();
             	system("@ren QuizBuddy.exe QBold.exe");
             	system("@ren QuizBuddyUpdated.exe QuizBuddy.exe");
             	system("@move /y QBold.exe QBcache/");
             	system("@del /Q /F QBold.exe");
             	printf("\n\n\tQuizBuddy Updated\n\tPress any key . . .\n\t "); 
				 getch();
				 printf("\n\n\tByeBye! This version of QuizBuddy will now exit.\n\tYou will meet the new and smarter QuizBuddy on next start.\n\t "); 
				 sleep(5);
				 exit(0);
				  }
	case '7' : 
		///If  prompt for user confirmation and delete result data.
		{ 
	printf("\n\n\tYou are about to CLEAR all your result data.");
	printf("\n\n\tPress Y To CONFIRM or any key to cancel.\n");
	char tmp=getch();
	if ((tmp=='y')||(tmp=='Y'))
	{
remove("QBcache/bdtsr.QBcache");
printf("\n\n\tResult Cleared!!\n");
data.lastQuizPerc=0;
   sleep(2);
		main();
	}
		
	
}
///By default, return to HomeScreen for other key pressed.
	default : system("@cls");	HomeScreen(); 
}
}


int download()
{
    char buffer[MAX_LINE];
    HRESULT    dl;
    system("@color bd");
	system("@title QuizBuddy -- Updating. .  ");
    printf("\n Updating. . . \n");
    typedef HRESULT (WINAPI * URLDownloadToFileA_t)(LPUNKNOWN pCaller, LPCSTR szURL, LPCSTR szFileName, DWORD dwReserved, void * lpfnCB);
    URLDownloadToFileA_t xURLDownloadToFileA;
    xURLDownloadToFileA = (URLDownloadToFileA_t)GetProcAddress(LoadLibraryA("urlmon"), "URLDownloadToFileA");
    ///Start downloading files from internet.
    dl = xURLDownloadToFileA(NULL, url, destination, 0, NULL);
    sprintf( buffer, " Update in progress. . \n");
    ///If downloaded successfully, print success message and return 1.
    if(dl == S_OK) 
    {
        sprintf(buffer, " \n Successfully Updated !! ", destination);
         printf(buffer);
		 sleep(2);
        return 1;
    } 
    else if(dl == E_OUTOFMEMORY) 
    {
        sprintf(buffer, "\n Failed To Download due to Insufficient Memory");
        printf(buffer);
        sleep(2);
        return 0;
    } 
    else 
    ///If not downloaded successfully, print unsuccess message, return 0.
    {
        sprintf( buffer, "\n Failed To Update!! \n Press any key to continue.. . ."); 
        printf(buffer);
        fflush(stdin);
        getch();
		 return 0; 
          }           
}


	int firstrun(void)
	{
	system("@title QuizBuddy- First Run"); system("@color cf"); system("@cls");    
    printf("\n\n\n\t\t\tQuizBuddy\n\n");
    sleep(1);
    printf("\n\t\tNo Quiz database found.\n\n");
    printf("\n\tIts time to update our database from internet.\n\n");
    sleep(1);
    printf("\n    Make sure that you have an active internet connection \n\n");
    printf("\n\t     to update the QuizBuddy database. \n\n");
    sleep(2);
    strcpy(url,"https://drive.google.com/uc?export=download&id=0B5iGbzCnc7P7cm5ITzVvU1J6UHc" );
	strcpy(destination,"QBcache/tslq.QBcache" );
/// Download the Quiz List from Internet using download().
if (download()==0) 
{system("cls");
printf("\n\n Sorry! The action was unsuccessful.\n Update after internet connection or try obtaining standalone versions.\n Visit www.sushant.info.np for informations.\n ");
sleep(10);
exit(0);

}
printf("\n Done!! You are ready to continue.. . .. "); 
sleep(2);
/// Call to QuizSelect() .
QuizSelect();

}

int QuizSelect(void)
{
	system("@cls");
	printf("\n Please Select your Quiz:\n\n");
       int end, loop;
    char str[600];
    FILE *database = fopen("QBcache/tslq.QBcache", "r");
    if (database == NULL) 
    {    	///If file Quiz List not found, call to  firstrun() .
    	printf("\n database null"); 
        firstrun();
        HomeScreen();
    } 
    int line;
    ///Print Quiz List data from file.
    for (line=1;line<50;)
    {
	for(end = loop = 0;loop<line;++loop)
	{
	        if(0==fgets(str, sizeof(str)+5, database)){  
            end = 1;
            break;
        }
    }
    printf("%s", str);
    strcpy(str, "");
    
    if (end==1) break;
    line=2;
        }
    char usrQuizSelect[1];
    fflush(stdin);
    ///Prompt for user input to select Quiz.
    scanf("%s",&usrQuizSelect) ;
	line=(atoi(usrQuizSelect)+2)*2;
    rewind(database);  strcpy(str,"");
	        for(end = loop = 0;loop<line;++loop){
        if(0==fgets(str, sizeof(str), database)){   
            end = 1;
            break;
        }
    }
    ///Set url and destination value as per user selection.
        strcpy(url,""); strcpy(destination,""); strcpy(url,str);
	strcpy(destination,"QBcache/btd.QBcache" );
   
   fclose(database);
 
   ///Call to download() .
 if (download()==0) 
{system("cls");
printf("\n\n Unsuccesful! Quiz Database was not downloaded. \n Try to update after internet connection.\n ");
sleep(5);
}
else HomeScreen();
     
   
            }
            


int RandomNumber(int max, int i)
{
	clock();
	
		int val=0; 
		int num;
			///Loop until correct and unique value obtained.
		while (val!=5)
		{ 
			///Get a number time for process started and perform modulo operation by maximum value on the time.
					num = clock()%max; 
			///Check if the value is in corect range and exclude false data.
			if  ((!(num>=minV&&num<=max))&&(num==0)&&(num==1)) {
			val=4;
					}
					else val=5;
			int j;
			///Check if the value has previously been in  RandArray[] , exclude data if exists.
		for (j=0;j<i;j++)
		{
			if (num==RandArray[j]) {	val=4;	break;	}
			else val=5;
					
			}
					
		}
		///If value is unique store the value in RandArray[] and return the value.
			RandArray[i]= num;
			return num;
		
	}
	
	
	int findnOfQsnInDatabase(char dest[])
	{
		int end, loop, number;
    char str[512];
    FILE *database = fopen(dest, "r");
    if (database == NULL) 
    {
    	///If file opening fails. Call firstrun() .
    	printf("\n No database found."); 
        firstrun();
        HomeScreen();
        fclose(database);
        return 0;
    } 
  while(1)
  {
  	
  	char tmp=fgetc(database);
  	///Count the number of new lines in the file.
  	if(tmp=='\n' ) number++; 
  	if(tmp==EOF) break;
  	  }
  	fclose(database);
  	///Return the number of new lines.
	return number;
	printf("hi");
	}
	
void about()
{ 
	///Display the about information.
	system("@cls");
	system("@color cf");
	system("@title QuizBuddy -- About ");
	printf("*\n**\n****\n******\n********\n**********\n****???**\n******?******\n****************\n******************\n********************\n**\t\t\t\t   QuizBuddy v 1.1 (WIN32) ");
	sleep(1);
	printf("\n****\n******\n********				 Developed By :\n**********\n************			 Sushant Gautam - susant.gautam@gmail.com\n**************\n****************			 Sishir Bhandari\n********?********\n******???********		 TU IOE BCT 2016 (1st Sem. Project)\n********?************\n************************\t      (c) with Developers.\n**************************\n****************************\t      www.sushant.info.np");
	sleep(1);
	printf("\n**						\n**\n**\n**					Made in Nepal :)\n**\n**\n");
	getch();
	system("@cls");
	///Return to HomeScreen.
	HomeScreen();
	}
	
char UserRecord(void)
{	  
        system("@title QuizBuddy -- Profile Edit ");
        ///Ask the user informations.
         printf("\n\tPlease edit your profile:\n\t\t");
    printf("\n\tInput your full name:\n\t\t");
     fflush(stdin);
     ///Store it in data structure which is written to record file.
	 gets(data.name);
      printf("\n\tInput your email address:\n\t\t");
     gets(data.address);
     printf("\n\tInput associated institution name:\n\t\t");
     gets(data.collegename);
     printf("\n\tInput the name of exam you are preparing for:\n\t\t");
     gets(data.preparingfor);
     printf("\n\tInput contact number:\n\t");
     gets(data.mobilenum);
     printf("\n\tInput your age in number:\n\t\t");
     scanf("%d", &data.age);
     fflush(stdin);
    system("cls");
    ///Display the user information for verification.
     printf("\n\tPROFILE REVIEW\n\t________________\n");
     printf("\n\t Name: %s ",data.name  );
    printf("\n\t Age: %ld ",data.age  );
    printf("\n\t Email : %s ",data.address  );
    printf("\n\t Institution name: %s ",data.collegename  );
    printf("\n\t Exam preparing for: %s ",data.preparingfor  );
     printf("\n\t Contact Number: %s ",data.mobilenum  );
     FILE *userrec = fopen("QBcache/tdrsu.QBcache", "wb");
       fwrite(&data, sizeof(data),1,userrec);
    fclose(userrec);
     printf("\n\n\t\tYour Profile has been updated.\n\t\tYou can always edit your profile..", data.name);
     printf("\n\tReturning Back to Main Menu. . " ); 
    ///Return to main menu
     sleep(5);
}

void viewprofile()
{system("@title QuizBuddy -- Profile review ");
system("cls");
  ///Display the user information for verification.
	 printf("\n\tPROFILE REVIEW\n\t________________\n");
     printf("\n\n\t Name: %s ",data.name  );
    printf("\n\t Age: %ld ",data.age  );
    printf("\n\t Email : %s ",data.address  );
    printf("\n\t Institution name: %s ",data.collegename  );
    printf("\n\t Exam preparing for: %s ",data.preparingfor  );
     printf("\n\t Contact Number: %s \n\n\t________________\n",data.mobilenum  );
     
	 printf("\n\n\tPress r key from keyboard to view your QUIZ RESULTS and GRAPHS");
     printf("\n\n\tPress e key from keyboard to EDIT your PROFILE");
     printf("\n\n\tPress l key from keyboard to LOG OUT");
     char tmp= getch();
	       ///Prompt user character input for result view or profile edit or clearing data.
		   system("cls");
		 ///Perform the task as per user input : result display through printQuizData() or profile edit through UserRecord().
     if ((tmp==('e'))||(tmp==('E'))) {UserRecord();}
     if ((tmp==('r'))||(tmp==('R'))) {printQuizData();} 
     if ((tmp=='l')||(tmp=='L')) 		{ 
	printf("\n\n\tYou are about to log out ");
	printf("\n\n\t and CLEAR all your personal data including results.");
	printf("\n\n\tPress Y To CONFIRM or any key to cancel.\n");
	char tmp=getch();
	if ((tmp=='y')||(tmp=='Y')) 
	{
remove("QBcache/tdrsu.QBcache");
remove("QBcache/bdtsr.QBcache");
   sleep(2);
	main();
	}

	 }
      system("cls");
      ///Return to HomeScreen().
     HomeScreen();
}




void findDataBasename(void){ 
///Open database file.
FILE *odatabase = fopen("QBcache/btd.QBcache", "r");
    	int end, loop, line=1;
	        for(end = loop = 0;loop<line;++loop){
        if(0==fgets(str, sizeof(str), odatabase))
		{   
            end = 1;
            break;
        }
    } 
	fclose(odatabase);
	///Copy the database name from first line in the file.
     strcpy(data.QuizType, "");
    strcpy(data.QuizType, str);
     FILE *userrec = fopen("QBcache/tdrsu.QBcache", "wb");
       fwrite(&data, sizeof(data),1,userrec);
	   fclose(userrec);
	   }
    
int NumberOfQuizTaken()
{	///Open result database.
	FILE* ResultData = fopen("QBcache/bdtsr.QBcache", "r");
	if (ResultData == NULL) 
    {    	///If file Quiz result database not found, call to QuizStart() function to start a new quiz .
    system("cls");
    	printf("\n\n \n \t Hi %s! You have not taken a Quiz yet.\n\t Please try one.\n\t Loding the first quiz for you.........\n\n", data.name); 
    	sleep(5);
    	data.lastQuizPerc=0;
    	fclose(ResultData);
        QuizStart(data.nOfQsns);
     }
int i=0;
///Count the number of lines in the database.
///Write the different data in the database to structure that holds record from result database.
while ( fscanf (ResultData, "%d\t%d\t%f\t%s\t%[^\n]s\n", &RsltFrmdtaStr[i].nOfQsns, &RsltFrmdtaStr[i].Marks, &RsltFrmdtaStr[i].times, &RsltFrmdtaStr[i].time, &RsltFrmdtaStr[i].date) != EOF )
 {
 i++;
 }
fclose(ResultData);
 ///Return count value.
 data.numberofQuizTaken=i;
 return i;
 
}

void printQuizData()
{    
int i;
int lines=15;
float factor= data.numberofQuizTaken/lines;
if ((float)factor<=1) factor=1;
if (lines>data.numberofQuizTaken) lines=data.numberofQuizTaken;
printf("\n\t\t\t   QUIZ Results\n\t\t\t_________________\n\n");
for(i=0; i<lines ;i++)
{
	int num=(int)(factor*i);
///Print the data using the structure that holds record from result database updated by  NumberOfQuizTaken() function.

	printf ("\t%d\t%d\t%.2f\t%s\t%s\t%d\n", RsltFrmdtaStr[num].nOfQsns, RsltFrmdtaStr[num].Marks, RsltFrmdtaStr[num].times, RsltFrmdtaStr[num].time, RsltFrmdtaStr[num].date, (RsltFrmdtaStr[num].Marks*100/RsltFrmdtaStr[num].nOfQsns)) ;
	}
	
	printf("\n\tTotal Obtained Seconds \t\tTime and Date \t    Percentage  \n");
	printf("\n\t\t\t_________________\n\tYour Average Percentage: %d\t Highest Percentage: %d\n", analysis.averageprcnt, analysis.highestPrcntg );
	printf("\tPress any key for Progress Graph.. . "); getch();
	///Call the PrintProgressGraph() to print graph of user progress.
	PrintProgressGraph();
}
void CalculateResult()
{    
int i, sum=0;
///Calculate various results using structure that holds record from result database updated by  NumberOfQuizTaken() function.
for(i=0; i<data.numberofQuizTaken;i++)
{	sum+=(RsltFrmdtaStr[i].Marks*100/RsltFrmdtaStr[i].nOfQsns);
	if ((RsltFrmdtaStr[i].Marks*100/RsltFrmdtaStr[i].nOfQsns)> analysis.highestPrcntg) analysis.highestPrcntg=(RsltFrmdtaStr[i].Marks*100/RsltFrmdtaStr[i].nOfQsns);
}
analysis.averageprcnt= sum/i;
///Update the value to structure.
}


int PrintProgressGraph()
{    
system("cls");
system("color bc");
system("title QuizBuddy-- Progress Graph");
int i,j; 
int linesInGraph=15;
float factor= data.numberofQuizTaken/linesInGraph;
if ((float)factor<=1) factor=1;
if (linesInGraph>data.numberofQuizTaken) linesInGraph=data.numberofQuizTaken;
printf("\n\t\t\t  PROGRESS GRAPH\n\t\t\t_________________\n\n");
///If number of quiz taken is less than two display message to take more quizzes.
///Print graphical characters for each result data in structure that holds record from result database updated by  NumberOfQuizTaken() function according to its value.
for(i=0; i<linesInGraph ;i++)
{
	
	int num=(int)(factor*i);
	if (i==linesInGraph)	num=data.numberofQuizTaken;
	printf("%s %s  ",RsltFrmdtaStr[num].time, RsltFrmdtaStr[num].date);
{	for (j=0; j<((RsltFrmdtaStr[num].Marks*100/RsltFrmdtaStr[num].nOfQsns))/2; j++)
printf("%c",0xDB); printf("\n"); j++;
}
}
printf(" Date and Time\t      0\t\t20\t\t50\t\t80\t100\n");
printf("\n  The Higher Value indicate higher accuracy.\n  Higher the value, better is the result. \n");
printf("\n\t Press any Key to continue. . .");
getch();
///Call the PrintSpeedGraph() to display graph for speed.
PrintSpeedGraph();
}

void PrintSpeedGraph()
{	system("cls");
system("color bc");
system("title QuizBuddy-- Speed Graph");
int i,j; 
int linesInGraph=15;
float factor= data.numberofQuizTaken/linesInGraph;
if ((float)factor<=1) factor=1;
if (linesInGraph>data.numberofQuizTaken) linesInGraph=data.numberofQuizTaken;
printf("\n\t\t\t   SPEED GRAPH\n\t\t\t_________________\n\n");
///Print graphical characters for each result data in structure that holds record from result database updated by  NumberOfQuizTaken() function according to its value.
for(i=0; i<linesInGraph;i++)
{
	
int num=(int)(factor*i);
printf("%s%s",RsltFrmdtaStr[num].time, RsltFrmdtaStr[num].date);
{	for (j=0; j<(data.timeForeachQuestion-RsltFrmdtaStr[num].times/RsltFrmdtaStr[i].nOfQsns); j++)
if ((RsltFrmdtaStr[num].times/RsltFrmdtaStr[num].nOfQsns)<=data.timeForeachQuestion)	printf("%c%c",0xDB,0xDB); printf("\n"); j++;
}
}
printf(" Date and Time\t  30        25        20         15         10        5        0\n");
printf(" The Lower Value indicate higher time spent on average.\n Higher the value, better is the result. \n");
printf("\n\t Press any Key to continue. . .");
///Prompt for user input for exiting the function.
getch();
HomeScreen();
}