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

#define MAX 100

#include <iostream.h>

void get_array( int [ MAX ][ MAX ] , int ) ;	//Gets the matrice from user
void write_array( int * , int ) ;				//Writes the matrice on the output device
int* add( int [ MAX ][ MAX ] , int ) ;			//Adds the matrice with itself
int* subtract( int [ MAX ][ MAX ] , int ) ;		//Subtracts the matrice with itself
int* multiply( int [ MAX ][ MAX ] , int ) ;		//Multiplies the matrice by itself
int* tar( int [ MAX ][ MAX ] , int ) ;			//Calculates the tar matrice

int main( void )
{
	int m ,
		mat1[ MAX ][ MAX ] ={ 0 } , *mat ;

	//Getting the size of matrice ...

	cout << "Enter the size of matrice in form m * m :( Enter m ) ? " ;
	cin >> m ;

	//Getting the matrice from user ...

	get_array( mat1 , m ) ;
	write_array( &mat1[ 0 ][ 0 ] , m ) ;

	//Adding section ...

	cout << "================= Adding ===================" << endl ;
	mat = add( mat1 , m ) ;
	write_array( mat , m ) ;

	//Subtracting section ...

	cout << "================= Subtract =================" << endl ;
	mat = subtract( mat1 , m ) ;
	write_array( mat , m ) ;

	//Multiplying section ...

	cout << "================= Multiplying ==============" << endl ;
	mat = multiply( mat1 , m ) ;
	write_array( mat , m ) ;

	//Tar section ...

	cout << "================= Tar ======================" << endl ;
	mat = tar( mat1 , m ) ;
	write_array( mat , m ) ;

	//Finishing the program ...

	cout << "============================================" << endl ;

	return 0 ;
}


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

void get_array( int m[ MAX ][ MAX ] , int s )
{

	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
		for( int col_counter = 0 ; col_counter < s ; col_counter++ )
		{
			cout << "Enter the member( " << row_counter << " , " << col_counter << " ) ? " ;
			cin >> m[ row_counter ][ col_counter ] ;
		}

}

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

void write_array( int *mat , int s )
{
			
	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
	{
		for( int col_counter = 0; col_counter < s ; col_counter++ )
			cout << *( mat + MAX * row_counter + col_counter ) << "\t" ;

		cout << endl ;
	}

}

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

int* add( int m[ MAX ][ MAX ] , int s )
{
	int res[ MAX ][ MAX ] = { 0 } ;

	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
		for( int col_counter = 0 ; col_counter < s ; col_counter++ )
			res[ row_counter ][ col_counter ] = m[ row_counter ][ col_counter ] + m[ row_counter ][ col_counter ] ;

	return &res[ 0 ][ 0 ] ;
}

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

int* subtract( int m[ MAX ][ MAX ] , int s )
{
	int res[ MAX ][ MAX ] = { 0 } ;

	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
		for( int col_counter = 0 ; col_counter < s ; col_counter++ )
			res[ row_counter ][ col_counter ] = m[ row_counter ][ col_counter ] - m[ row_counter ][ col_counter ] ;

	return &res[ 0 ][ 0 ] ;
}

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

int* multiply( int m[ MAX ][ MAX ] , int s )
{
	int temp ,
		res[ MAX ][ MAX ] = { 0 } ;

	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
		for( int col_counter = 0 ; col_counter < s ; col_counter++ )
		{
			temp = 0 ;

			for( int k_counter = 0 ; k_counter < s ; k_counter++ )
				temp += m[ row_counter ][ k_counter ] * m[ k_counter ][ col_counter ] ;

			res[ row_counter ][ col_counter ] = temp ;
		}

	return &res[ 0 ][ 0 ] ;
}

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

int* tar( int m[ MAX ][ MAX ] , int s )
{
	int res[ MAX ][ MAX ] = { 0 } ;

	for( int row_counter = 0 ; row_counter < s ; row_counter++ )
		for( int col_counter = 0 ; col_counter < s ; col_counter++ )
			res[ col_counter ][ row_counter ] = m[ row_counter ][ col_counter ] ;

	return &res[ 0 ][ 0 ] ;
}