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polymorphismMystery8

Language/Type: C++ inheritance polymorphism

Consider the following classes; assume that each is defined in its own file. 

class Eliza : public Burr {
public:
    virtual void m2() {
        cout << "E2" << endl;
        Hamilton::m2();
    }
    
    virtual void m3() {
        Burr::m3();
        cout << "E3" << endl;
    }
};

class George : public Eliza {
public:
    virtual void m1() {
        cout << "G1" << endl;
        Burr::m1();
    }
    
    virtual void m4() {
        cout << "G4" << endl;
        m2();
    }
};

class Hamilton {
public:
    virtual void m1() {
        cout << "H1" << endl;
        m2();
    }

    virtual void m2() {
        cout << "H2" << endl;
    }
};

class Burr : public Hamilton {
public:
    virtual void m1() {
        Hamilton::m1();
        cout << "B1" << endl;
    }

    virtual void m3() {
        cout << "B3" << endl;
    }
};

Now assume that the following variables are defined: 

Hamilton* var1 = new Burr();
Hamilton* var2 = new Eliza();
Burr* var3 = new Eliza();
Eliza* var4 = new George();

In the table below, indicate in the right-hand column the output produced by the statement in the left-hand column. If the statement produces more than one line of output, indicate the line breaks with slashes as in "x / y / z" to indicate three lines of output with "x" followed by "y" followed by "z". If the statement does not compile, write "COMPILER ERROR". If a statement would crash at runtime or cause unpredictable behavior, write "CRASH".

var1->m1();
var1->m2();
var2->m1();
var2->m2();
var2->m3();
var3->m1();
var3->m2();
var3->m3();
var4->m1();
var4->m4();
((Burr*) var1)->m3();
((Eliza*) var2)->m4();
((George*) var4)->m4();
((Eliza*) var3)->m3();
((George*) var2)->m4();

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