/* Joel Bares
 CIS 22A Winter 2017
 Assignment I
 Problem I2

 This program receives 4 numbers
 from the user and calculates
 the sum and then displays it.
 The functions make use of arrays
*/


#include <iostream>

using namespace std;

// ***************************
// * RECEIVES DATA FROM USER *
// ***************************

void getData(int i[], int);

// ***************************
// * COMPUTES SUM FOR USER   *
// ***************************
int computeTotal(int i[], int);

// ***************************
// *  DISPLAYS SUM FOR USER  *
// **************************
void printAll(int i[], int, int);


int main()
{
    const int ARRAY_SIZE = 4;
    int i[ARRAY_SIZE];
    int sum;

    getData(i, ARRAY_SIZE);
    sum = computeTotal(i, ARRAY_SIZE);
    printAll(i, ARRAY_SIZE, sum);


    return 0;
}

// ************************************
// * FOR LOOP USES A COUNT TO ASK USER*
// * FOR A NUMBER THEN INPUTS IT INTO *
// * THE ARRAY AND SENDS IT BACK TO   *
// * MAIN                             *
// ***********************************
void getData(int i[], int size)
{
    for(int count = 0; count < size; count++)
    {
    cout << "Please enter a number" << endl;
    cin >> i[count];
    }

}

// **************************************
// * FOR LOOP GOES THROUGH EACH ELEMENT *
// * OF THE ARRAY AND CALCULATES THE    *
// * SUM FOR THE USER                   *
// **************************************
int computeTotal(int i[], int size)
{
    int total = 0;
    for(int count = 0; count < size; count++)
    {
        total += i[count];
    }
    return total;
}


// ****************************************
// * FOR LOOP GOES THROUGH EACH ELEMENT   *
// * OF THE ARRAY AND PRINTS THEM IN THE  *
// * FORM REQUESTED BY THE TEACHER FOR    *
// * THE USER                             *
// ****************************************
void printAll(int i[], int size, int sum)
{
    for(int count = 0; count < size; count++)
    {
        cout << i[count];
        if(count <= 2)
        {
            cout << " + ";
        }

        if(count == 3)
        {
            cout << " = " << sum << endl;
        }
    }
}

/* EXECUTION RESULTS:
 Please enter a number
 4
 Please enter a number
 6
 Please enter a number
 9
 Please enter a number
 12
 4 + 6 + 9 + 12 = 31
 Program ended with exit code: 0

 Please enter a number
 1
 Please enter a number
 7
 Please enter a number
 9
 Please enter a number
 15
 1 + 7 + 9 + 15 = 32
 Program ended with exit code: 0


*/