#include <cstddef>
#include <iostream>

/***************************************************
 * Printing the entries of an array
 *
 * Write a function that prints the entries of an
 * array, separated by commas and spaces.
 *
 * For example, the array
 *
 *     { 34, 15, 65, 59, 42 }
 *
 * should be printed as
 *
 *     34, 15, 65, 59, 42
 *
 * Follow the output by an end-of-line character.
 *
 * If there are no entries, just print the
 * end-of-line character.
 ***************************************************/

// Function declarations
void print_array(
    int const array[],
    std::size_t const capacity
);

int main();

// Function definitions
int main() {
    int array1[1]{ 42 };
    int array2[5]{ 34, 15, 65, 59, 42 };
    int array3[27]{
        50, 65, 23, 46, 57,  3, 29, 22, 99,
        73, 44,  2, 48, 88, 98, 38, 17, 46,
        19, 34, 93, 88, 46, 52, 69, 38, 79
    };

    print_array( nullptr, 0 );
    print_array( array1,  1 );
    print_array( array2,  5 );
    print_array( array3, 27 );

    return 0;
}

void print_array(
    int const array[],
    std::size_t const capacity
) {
    std::cout << std::endl;
}


































// Hint:
//
// You will need a for loop that steps through the
// array, and the loop variable must have type
// std::size_t.
//
// The difficulty is deciding when to print
//
//     ", "
//
// You do not want a comma before the first entry,
// nor do you want one after the final entry.
//
// If the array has capacity 0 or 1, no commas
// should be printed.
//
// One approach is to treat the first entry
// separately. If there is a first entry, print it
// without a comma. Then use a for loop to print
// each remaining entry preceded by ", ".


































// Here is one solution:

/*
void print_array(
    int const array[],
    std::size_t const capacity
) {
    if ( capacity > 0 ) {
        std::cout << array[0];

        for ( std::size_t k{ 1 }; k < capacity; ++k ) {
            std::cout << ", " << array[k];
        }
    }

    std::cout << std::endl;
}
*/


































// Another possibility:
//
// Instead of treating the first entry separately,
// keep track of whether an entry has already been
// printed.

/*
void print_array(
    int const array[],
    std::size_t const capacity
) {
    bool first_is_printed{ false };

    for ( std::size_t k{ 0 }; k < capacity; ++k ) {
        if ( first_is_printed ) {
            std::cout << ", ";
        } else {
            first_is_printed = true;
        }

        std::cout << array[k];
    }

    std::cout << std::endl;
}
*/