Question

Outside of main declare two constant variables: an integer for number of days in the week and a double for the revenue per pizza (which is $8.50). Create the function prototypes.

Create main

Inside main:

1. Declare an integer array that can hold the number of pizzas purchased each day for one week.
2. Declare two additional variables one to hold the total sum of pizzas sold in a week and one to hold the average pizzas sold per day
3. Using an appropriate loop, ask the user to enter in the number of pizza for each day
   1. The program must test the entry value.
   2. If the number entered is negative, the program must display an error message and allow for the reentry of the value for that day. The program will continue to ask for a valid response until a valid response is entered.
   3. If the number is valid (greater than or equal to zero), the program will then prompt for the next value until the loop ends.
   4. Extra Credit will be given if the validation test is done via a function call.
4. Send the array to a function that displays a title for the report as well as the number of pizzas sold for each day.
5. Send the array to a function that calculates the sum total of pizzas sold for the week; the function returns the sum total back to main().
6. Send the array to a function that calculates the average number of pizzas sold for the week; the function returns the average back to main().
7. Display the following:
   1. The total number of pizzas sold for the week
   2. The average number of pizzas sold per day
   3. The total revenue from the pizza sold for the week
   4. The average revenue per day
8. Display a thank you/goodbye message.
9. Comment your code.

Submit the .cpp file and a screen shot in Canvas

Screen Shots:

please write the code for c++

Answer 1

CODE SCREENSHOTS:

OUTPUT SCREENSHOT:

CODE:

#include <bits/stdc++.h>
using namespace std;

const int days = 7;          // days in the week
const double revenue = 8.50; // revenue per pizza

bool check(int temp) // checks if the entered value is positive
{
    return (temp >= 0); // returns true for positive
}

void display(int a[]) // for the report display
{
    cout << endl
         << endl
         << "PIZZA REPORT\n\n";
    for (int i = 0; i < days; i++)
    {
        cout << "Day " << i + 1 << ": " << a[i] << " pizza(s) sold\n"; // pizzas sold each day
    }
}

int calcSum(int a[]) // calculate total sum
{
    int sum = 0;
    for (int i = 0; i < days; i++)
        sum += a[i];

    return sum;
}

int calcAvg(int a[]) // calculate avg pizzas sold in a day
{
    int sum = calcSum(a);
    return sum / days; // returns int cause pizza is a whole
}

double calcTotalRevenue(int a[]) // calculate total revenue
{
    double sum = 0;
    for (int i = 0; i < days; i++)
        sum += a[i] * revenue;
    return sum;
}

double calcAvgRevenue(int a[]) // calculate avg revenue in a day
{
    double sum = calcTotalRevenue(a);
    return sum / days;
}

int main()
{
    int a[days];
    int sum; // total sum of pizzas sold in a week
    int avg; // average pizzas sold per day
    int temp;
    double totalRevenue; // The total revenue from the pizza sold for the week
    double avgRevenue;   // The average revenue per day
    cout << "\nEnter the values: \n";
    // Input values
    for (int i = 0; i < days; i++)
    {
        cout << "Day " << i + 1 << ": ";
        cin >> temp;
        if (!check(temp))
        {
            cout << "Enter a positive value\n";
            cout << "Day " << i + 1 << ": ";
            cin >> temp;
        }
        a[i] = temp;
    }
    display(a);
    sum = calcSum(a);
    avg = calcAvg(a);
    totalRevenue = calcTotalRevenue(a);
    avgRevenue = calcAvgRevenue(a);
    cout << "\nThe total number of pizzas sold for the week:  " << sum;
    cout << "\nThe average number of pizzas sold per day:  " << avg;
    cout << "\nThe total revenue from the pizza sold for the week:  " << totalRevenue;
    cout << "\nThe average revenue per day:  " << avgRevenue;
    cout << "\n\nTHANK YOU";
    return 0;
}

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