work

#include <iostream>
#include <iomanip>
#include <cstdlib>

void add_arr (unsigned int *a1, size_t s1, unsigned int *a2, size_t s2, unsigned int *a3, size_t s3);
void out_arr (unsigned int *a1, size_t s);
void inp_arr (unsigned int *a1, size_t s);

using namespace std;

int main (void)
{
    const int max_size = 10;
    unsigned int arr1[max_size] = {0}, arr2[max_size] = {0}, arr3[max_size] = {0};
    int size;

    do
    {
        cout << "input size of arrays: ";
        cin >> size;
    } while (size > max_size);

    inp_arr(arr1, size);
    inp_arr(arr2, size);
    add_arr(arr1, size, arr2, size, arr3, size);
    cout << "array3\n";
    out_arr(arr3, size);

    system("pause");
    return 0;
}


void add_arr (unsigned int *a1, size_t s1, unsigned int *a2, size_t s2, unsigned int *a3, size_t s3)
{
    if ((s2 == s1) && (s3 >= s2))
    {
        for (size_t i = 0; i < s1; i++)
            a3[i] = a2[i] + a1[i];
        }
    else
    {
        cout << "wrong value" << endl;
    }
}

void out_arr (unsigned int *a1, size_t s)
{
    for (size_t i = 0; i < s; i++)
        cout << setw(5) << a1[i];
    cout << endl;
}

void inp_arr (unsigned int *a1, size_t s)
{
    for (size_t i = 0; i < s; i++)
    {
        cout << "input " << i << " element: ";
        cin >> a1[i];
    }
    cout << endl;
}