0

```
Problem1:
Write the definition for a class named Vector2D that stores information about a two-dimensional vector. The class should have methods to get and set the x component and the y component, where x and y are integers.
Next, overload the * operator so that it returns the dot product of two vectors. The dot product of two-dimensional vectors A and B is equal to
`(Ax * Bx) + (Ay * By)`
Next, overload the << and >> operators so that you can write the following code
Vector2D v;
cin >> v;
cout << v;
Finally, write a main program that tests the three overloaded operators.
Sample output (bolded text denote input from user)
(10,0) * (0,10) = 0
(0,10) * (10,10) = 100
(10,10) * (5,4) = 90
```

`You may use the following main() function:`

```
int main()
{
Vector2D v1, v2, v3, v4;
cin>>v1>>v2>>v3>>v4;
cout << v1 <<" * "<< v2<< " = " << v1*v2 << endl;
cout << v2 <<" * "<< v3<< " = " << v2*v3 << endl;
cout << v3 <<" * "<< v4<< " = " << v3*v4 << endl;
return 0;
}
```

`WHAT I HAVE SO FAR:`

```
# include <iostream>
# include <vector>
# include<cmath>
class Vector2D
{
public:
Vector2D(void);
Vector2D(double nx, double ny);
Vector2D(bool v);
void normalize(void);
double magnitude(void);
void full_dump(void) const;
bool valid;
double x,y;
};
double dot(Vector2D v, Vector2D w);
Vector2D operator+(Vector2D v, Vector2D w);
Vector2D operator*(Vector2D v, Vector2D w);
Vector2D operator*(Vector2D v, double w);
Vector2D operator*(double w, Vector2D v);
inline Vector2D::Vector2D(void)
{
x=y=0;
valid=true;
}
inline Vector2D::Vector2D(double nx, double ny)
{
x=nx;
y=ny;
valid=true;
}
inline Vector2D::Vector2D(bool v)
{
x=y=0;
valid=v;
}
inline Vector2D operator+(Vector2D v, Vector2D w)
{
return Vector2D(v.x + w.x, v.y + w.y);
}
inline Vector2D operator*(Vector2D v, Vector2D w)
{
return Vector2D(v.x * w.x, v.y * w.y);
}
inline Vector2D operator*(Vector2D v, double w)
{
return Vector2D(v.x * w, v.y * w);
}
inline Vector2D operator*(double w, Vector2D v)
{
return v*w;
}
inline Vector2D operator/(Vector2D v, Vector2D w)
{
return Vector2D (v.x / w.x, v.y / w.y);
}
inline Vector2D operator/(Vector2D v, double w)
{
return Vector2D (v.x / w, v.y / w);
}
inline Vector2D operator/(double w, Vector2D v)
{
return Vector2D (w / v.x, w / v.y);
}
inline void Vector2D::normalize(void)
{
double mag=magnitude();
x/=mag;
y/=mag;
}
inline double Vector2D::magnitude(void)
{
return sqrt(x*x+y*y);
}
inline Vector2D cross(Vector2D v, Vector2D w)
{
return Vector2D(0,0);
}
inline double dot(Vector2D v, Vector2D w)
{
Vector2D x=w*v;
return x.x + x.y;
}
int main()
{
Vector2D v1, v2, v3, v4;
cin>>v1>>v2>>v3>>v4;
cout << v1 <<" * "<< v2<< " = " << v1*v2 << endl;
cout << v2 <<" * "<< v3<< " = " << v2*v3 << endl;
cout << v3 <<" * "<< v4<< " = " << v3*v4 << endl;
return 0;
}
```

obviously what I have for the main function wont work, I need help fixing it so that the output will be the same as the example given because im not sure how to overload it. any help is much appreciated! thanks!