TheAlgorithms-C-Plus-Plus/operations_on_datastructures/union_of_2_arrays.cpp

#include <iostream>
int main()
{
    int m, n, i = 0, j = 0;
    cout << "Enter size of both arrays:";
    cin >> m >> n;
    int a[m];
    int b[n];
    cout << "Enter elements of array 1:";
    for (i = 0; i < m; i++) cin >> a[i];
    cout << "Enter elements of array 2:";
    for (i = 0; i < n; i++) cin >> b[i];
    i = 0;
    j = 0;
    while ((i < m) && (j < n))
    {
        if (a[i] < b[j])
            cout << a[i++] << " ";
        else if (a[i] > b[j])
            cout << b[j++] << " ";
        else
        {
            cout << a[i++];
            j++;
        }
    }
    while (i < m) cout << a[i++] << " ";
    while (j < n) cout << b[j++] << " ";
    return 0;
}