Oops Quesions

#include

using namespace std;
class abc {
void f();
void g();
int x;
};

main() {
cout<<sizeof(abc)<<endl;
}

#include
using namespace std;
int main ()
{
int x, y;
x = 5;
y = ++x * ++x;
cout << x << y;
x = 5;
y = x++ * ++x;
cout << x << y;
return 0;
}