output of this question

int global=10;
void func(int&x,inty)
{
x=x-y;
y=x*10;
cout<<x<<','<<y<<'\n';
}
void main()
{
int global=7;
func(::global,global)
cout<<global<<','<<::global<<'\n';
func(global,::global);
cout<<global<<','<<::global<<'\n';
}