/************************************************************************************/
/* This program has been written by : KAMRAN AMINI 841410306						*/
/* This program claculates some operations on one matrice                           */
/************************************************************************************/

#define MAX 20

#include <iostream.h>
#include <iomanip.h>
#include <string.h>

//=============== Dars Structure ===========================

struct Dars
{
	unsigned int code ;
	unsigned float score ;
} ;

//=============== Student Structure ========================

struct Student 
{
	unsigned int number ;
	unsigned int number_of_dars ;
	char first_name[ 128 ] ;
	char last_name[ 128 ] ;
	unsigned float average ;
	Dars dars[ MAX ] ;
} ;

//=============== Functions ================================

void assign( Student * , Student ) ;
void sort_by_number( Student [ MAX ] , int ) ;
void show( Student [ MAX ] , int ) ;
void print( Student ) ;
void avg( Student * ) ;

//================== Main Program ==========================

int main( void )
{
	int student_counter = 0 ,
		dars_counter ,
		index , num ;
	Student list[ MAX ] ;
	bool cont = true , 
		 add = true ,
		 found = false ;

	//Initializeing ...

	for( int counter = 0 ; counter < MAX ; counter++ )
		list[ counter ].number_of_dars = 0 ;

	//Begining ...

	while( cont && student_counter < MAX )
	{
		cout << "Enter the number of student( " << student_counter + 1  << " )[ Enter -1000 for exit ] ? " ;
		cin >> num ;

		if( num == -1000 )
			cont = false ;
		else
		{
			//There is anyone with this number ...

			for( counter = 0 ; counter < MAX ; counter++ )
				if( num == list[ counter ].number )
				{
					index = counter ;
					found = true ;
					break ;
				}

			if( found )
				add= false ;
			else
			{
				cout << "\tEnter the first and last name ?" ;
				cin >> list[ student_counter ].first_name >> list[ student_counter ].last_name ;
				
				list[ student_counter ].number = num ;
				index = student_counter ;
				add = true ;
			}

			dars_counter = list[ index ].number_of_dars ;

			while( dars_counter < MAX )
			{
				cout << "\tEnter the code of dars( " << dars_counter + 1 << " )[ Enter -1000 for exit ] ? " ;
				cin >> list[ index ].dars[ dars_counter ].code ;

				if( list[ index ].dars[ dars_counter ].code == -1000 || dars_counter == 19 )
				{
					list[ index ].number_of_dars = dars_counter ;
					break ;
				}
				else
				{
					cout << "\tEnter the score of this dars ? " ;
					cin >> list[ index ].dars[ dars_counter ].score ;
				}

				dars_counter++ ;
			}
			
			avg( &list[ index ] ) ;
			
			if( add )
				student_counter++ ;
		}
	}

	sort_by_number( list , student_counter ) ;
	show( list , student_counter ) ;

	return 0 ;
}
		
//=====================================================

void assign( Student *s1 , Student s2 )
{
	s1->average = s2.average ;
	
	for( int counter = 0 ; counter < MAX ; counter++ )
		s1->dars[ counter ] = s2.dars[ counter ] ;

	strcpy( s1->first_name , s2.first_name ) ;
	strcpy( s1->last_name , s2.last_name ) ;
	s1->number = s2.number ;
	s1->number_of_dars = s2.number_of_dars ;
}

//=====================================================

void sort_by_number( Student list[ MAX ] , int student_counter )
{
	Student temp ;

	for( int rco = 0 ; rco < student_counter ; rco++ )
		for( int cco = 0 ; cco < student_counter ; cco++ )
			if( list[ rco ].number < list[ cco ].number )
			{
				assign( &temp , list[ rco ] ) ;
				assign( &list[ rco ] , list[ cco ] ) ;
				assign( &list[ cco ] , temp ) ;
			}

}

//=====================================================

void show( Student list[ MAX ] , int student_counter ) 
{
	for( int counter = 0 ; counter < student_counter ; counter++ )
		print( list[ counter ] ) ;

}

//=====================================================

void print( Student s )
{
	cout	<< setiosflags( ios::showpoint || ios::fixed ) << setprecision( 2 ) 
			<< "************************************" << endl 
			<< "Student Number : " << s.number << endl
			<< "Student Name : " << s.first_name << " " << s.last_name << endl 
			<< "Student Average : " << s.average << endl 
			<< "Number of dars : " << s.number_of_dars << endl ;
}

//=====================================================

void avg( Student *s )
{
	float sum = 0 ;

	for( int counter = 0 ; counter < s->number_of_dars ; counter++ )
		sum += s->dars[ counter ].score ;

	s->average = sum / s->number_of_dars ;
}