✨ override ==, !=

main.cpp

@@ -16,5 +16,13 @@ int main()
     p1 += p2;
     cout << p1 << endl;
 
+    cout << (p1 == p2) << endl;
+    cout << (p1 != p2) << endl;
+
+    p1 = Position(4, 1);
+
+    cout << (p1 == p2) << endl;
+    cout << (p1 != p2) << endl;
+
     return 0;
 }

position/Position.cpp

@@ -18,8 +18,8 @@ std::ostream &operator<<(ostream &os, const Position &pos)
 
 Position &Position::operator+=(const Position &rhs)
 {
-    this->m_x_pos += rhs.m_x_pos;
+    m_x_pos += rhs.m_x_pos;
-    this->m_y_pos += rhs.m_y_pos;
+    m_y_pos += rhs.m_y_pos;
     return *this;
 }
 
@@ -28,3 +28,14 @@ Position operator+(Position lhs, const Position &rhs)
     lhs += rhs;
     return lhs;
 }
+
+bool Position::operator==(const Position &rhs) const
+{
+    return m_x_pos == rhs.m_x_pos
+           && m_y_pos == rhs.m_y_pos;
+}
+
+bool Position::operator!=(const Position &rhs) const
+{
+    return !(*this == rhs);
+}

position/Position.h

@@ -14,9 +14,16 @@ private:
     int m_x_pos, m_y_pos;
 public:
     explicit Position(int x_pos, int y_pos);
-    Position& operator+=(const Position& rhs);
+
-    friend Position operator+(Position lhs, const Position& rhs);
+    bool operator==(const Position &rhs) const;
-    friend std::ostream& operator<<(std::ostream& os, const Position& pos);
+
+    bool operator!=(const Position &rhs) const;
+
+    Position &operator+=(const Position &rhs);
+
+    friend Position operator+(Position lhs, const Position &rhs);
+
+    friend std::ostream &operator<<(std::ostream &os, const Position &pos);
 };