3.4

#include <iostream>
using namespace std;

int main() {
    int a1 = 16, b1 = 11;
    int a2 = 18, b2 = 03;
    pair<int, int> par1(a1, b1);
    pair<int, int>* par2 = new pair<int, int>(a2, b2);
    cout << par1.first << '.' << par1.second << endl;
    cout << par2->first << '.' << par2->second << endl;
    system("pause");
    return 0;
}
Run on cpp.sh