#include
using namespace std;
class myclass {
int x;
public:
myclass(int n = 0) {
x = n;
}
int getx() {
return x;
}
};
int main()
{
myclass o1(10); // declare with initial value
myclass o2; // declare without initializer
cout << "o1: " << o1.getx() << '\n';
cout << "o2: " << o2.getx() << '\n';
return 0;
}