#include <iostream>
using namespace std;
class Vector
{
public:
Vector(int a, int b)
{
x = a;
y = b;
}
void wrt()
{
cout<<"x = " << x << " y = " << y << endl;
}
void set(int a, int b)
{
x = a;
y = b;
}
private:
int x, y;
};
int main() {
Vector a(10, 10);
Vector* b = &a;
Vector c = *b;
a.set(20, 20);
a.wrt();
c.wrt();
return 0;
}
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