Exer03_36_2.cpp

#include <iostream>
#include <vector>
using std::cin;
using std::cout;
using std::endl;
using std::vector;
int main()
{
    vector<int> v1 = {2, 3, 5, 7, 8};
    vector<int> v2 = {2, 3, 5, 7, 8};
    auto pv1 = v1.begin();
    auto pv2 = v2.begin();
    if(v1.end() - v1.begin() == v2.end() - v2.begin())
    {
        while(pv1 != v1.end() && pv2 != v2.end())
        {
            if(*pv1 != *pv2)
            {
                cout << "a1 and a2 are NOT equal!" << endl;
                return -1;
            }
            ++pv1;
            ++pv2;
        }
        cout << "a1 and a2 are equal!" << endl;
    }
    else
    {
        cout << "a1 and a2 are NOT equal!" << endl;
        return -1;
    }
    return 0;
}