//-------------------------------------------------

//             Jordi Binefa i Martínez

//                dubtes@excite.com

//           http://members.juara.com/asi

//-------------------------------------------------



//Write the program ARRAY2.CPP, that will be used to 

//calculate the average temperature of n towns all the 

//week. The algorithm is similar to the exercise 7, with 

//the difference of using a bidimensional array, one 

//dimension for the days of the week (7 days) and the 

//other for the towns. The way to ask the temperatures 

//will be : temp[i][j]=_, been i a number in the range 

//from 0 to n-1 (town number) and j goes between 1 and 

//7 (weekday). In other way, it asks first temp[0][1], 

//after temp[0][2] ... until arrives to temp[0][7] and 

//after asks temp[1][0]... until arrives to temp[n-1][7]. 

//At last the program shows the weekly average of the towns.



//Fes el programa MATRIU2.CPP, que serveix per calcular 

//la temperatura mitja de n poblacions al llarg de la

//setmana. El mètode de funcionament es similar al de 

//l’exercici 7, amb la diferència que has de fer servir un

//array bidimensional, una dimensió per als dies de la 

//setmana (7 dies) i un altra per a les poblacions. La

//forma de preguntar les temperatures serà : temp[i][j]=_,

//essent i un número que va des de 0 a n-1

//(representa el número de població) i j varia entre 1 i 7

//(dia de la setmana). Es a dir, primer ens preguntarà

//temp[0][1], després temp[0][2] ... fins que arribem a 

//temp[0][7] i després preguntarà temp[1][0]... 

//fins arribar a temp[n-1][7]. Al final el programa ens 

//presenta la temperatura mitja setmanal de cada població 

//i la temperatura mitja total.



#include <iostream.h>



#define MAX_TOWNS 20

#define DAYS 7



int howManyTowns(int max){

	int num;



	do{

		cout << "\n\nHow many towns ( max : "

			<< max << " )? : ";

		cin >> num;

	}while( (num < 1) || (num > max) );

	return num;

}



void entryTemp(float t[][DAYS], int pobls){

	int i,j;



	for( i = 0 ; i < pobls ; i++ )

		for( j = 0 ; j < DAYS ; j++){

			cout << "\n Temperature of the town["

				<< i << "] the day " << j+1 << " = ";

			cin >> t[i][j];

		}

}



float doAverage(float tem[][DAYS], int pobls){

	int i,j;

	float mitjana = 0.0;



	for( i = 0 ; i < pobls ; i++ )

		for ( j = 0 ; j < DAYS ; j++)

			mitjana += tem[i][j];



	return(mitjana/(float)(pobls * DAYS));

}



void main(){

	float temperature[MAX_TOWNS][DAYS];

	int towns;



	towns = howManyTowns( MAX_TOWNS );

	entryTemp( temperature , towns );

	cout << "\n\nThe average temperature in all the towns is "

		<< doAverage( temperature , towns)

		<< " degrees.\n\n";

}