请在下面程序的横线处填上适当内容，以使程序完整，并使程序的输出为： The data of rect(X,Y,W,H): (6,8,3,4) #include <iostream> using namespace std; class Point { public: Point(int i = 0, int j = 0) { x = i; y = j; } void move(int xOff, int yOff) { x += xOff; y += yOff; } int getX() { return x; } int getY() { return y; } private: int x, y; }; class Rectangle : private Point { public: Rectangle(int xi, int yi, int wi, int hi) : { w = wi; h = hi; } //（1） void move(int xOff, int yOff) { ; } //（2） int getX() { ; } //（3） int getY() { ; } //（4） int getW() { ; } //（5） int getH() { ; } //（6） private: int w, h; }; int main() { Rectangle rect(1, 2, 3, 4); rect.move(5, 6); cout << "The data of rect(X,Y,W,H): (" << rect.getX() << "," << rect.getY() << "," << rect.getW() << "," << rect.getH() << ")" << endl; return 0; }

#include <iostream>  

using namespace std; 

class Point { 
public: 	
    Point(int i = 0, int j = 0) { 
        x = i; 
        y = j; 
    } 	
    void move(int xOff, int yOff) { 
        x += xOff; 
        y += yOff; 
    } 	
    int getX() { 
        return x; 
    } 	
    int getY() { 
        return y; 
    } 
private: 	
    int x, y; 
}; 

class Rectangle : private Point { 
public: 	
    Rectangle(int xi, int yi, int wi, int hi) : Point(xi, yi) { 
        w = wi; 
        h = hi; 
    }   
    void move(int xOff, int yOff) { 
        Point::move(xOff, yOff); 
    }       
    int getX() { 
        return Point::getX(); 
    }                      
    int getY() { 
        return Point::getY(); 
    }                      
    int getW() { 
        return w; 
    }                    
    int getH() { 
        return h; 
    }  
private: 	
    int w, h; 
}; 

int main() { 	
    Rectangle rect(1, 2, 3, 4); 	
    rect.move(5, 6); 	
    cout << "The data of rect(X,Y,W,H): (" << rect.getX() << "," 		
         << rect.getY() << "," << rect.getW() << "," << rect.getH() << ")" << endl; 	
    return 0; 
}

输出结果为： The data of rect(X,Y,W,H): (6,8,3,4)