template<class T>
void swapNum(T a,T b)
{
T temp;
temp = a;
a = b;
b = temp;
}
int main(void)
{
int x = 10;
int y = 20;
swapNum<int*>(&x,&y);
cout << "x = " << x << endl;
cout << "y = " << y << endl;
return 0;
}
