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();
}
```