A simple program to solve the sum and product of five numbers using C++ programming language.

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Program Listing

// BEGIN CODE

#include <iostream>
#include <algorithm>
#include <numeric>

const std::string ordinal_words[] =
{
     "first", "second", "third", "forth", "fifth"
};

void calculations(int numbers[], int size) {
     int product = 1;

     int sum = 0;

     for (int i = 0; i < size; ++i) {
         product *= numbers[i];
         sum += numbers[i];
     }
     std::cout << "The sum of 5 numbers: " << sum << "\n";

     std::cout << "The product of 5 numbers: " << product << "\n";
}

void four_numbers()
{
     const int NUM_ELEMS = 4;
     int numbers[NUM_ELEMS] = { 0 };

     for (int i = 0; i < NUM_ELEMS; ++i) {
         std::cout << "Enter " << ordinal_words[i] << " number: ";
         std::cin >> numbers[i];
     }
     bool allEqual = std::all_of(numbers + 1, numbers + NUM_ELEMS,
                     [&numbers](int num){return num == numbers[0];} );

     std::cout << (allEqual ?  "true" : "false") << "\n";
}

void five_numbers()
{
     const int NUM_ELEMS = 5;
     int numbers[NUM_ELEMS] = { 0 };

     for (int i = 0; i < NUM_ELEMS; ++i) {
         std::cout << "Enter " << ordinal_words[i] << " number: ";
         std::cin >> numbers[i];
     }
     bool allEqual = std::all_of(numbers + 1, numbers + NUM_ELEMS,
             [&numbers](int num) {
                 return (num == numbers[0]);
             });

     std::cout << (allEqual ? "true" : "false") << "\n";
     calculations(numbers, NUM_ELEMS);
}



int main()
{
     four_numbers();
     five_numbers();

}

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