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polymorphismMystery9

Language/Type: C++ inheritance polymorphism

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

class Grinch : public Frosty {
public:
    virtual void m2() {
        cout << "Grinch m2   ";
        m1();
    }

    virtual void m3() {
        cout << "Grinch m3   ";
        Frosty::m3();
    }

    virtual void m4() {
        cout << "Grinch m4   ";
        m3();
    }
};

class Frosty : public Santa {
public:
    virtual void m1() {
        cout << "Frosty m1   ";
    }

    virtual void m3() {
        cout << "Frosty m3   ";
    }
};

class Santa {
public:
    virtual void m1() {
        m3();
        cout << "Santa m1   ";
    }

    virtual void m3() {
        cout << "Santa m3   ";
    }
};

class Rudolph : public Santa {
public:
    virtual void m2() {
        cout << "Rudolph m2   ";
        m1();
    }

    virtual void m3() {
        cout << "Rudolph m3   ";
        Santa::m3();
    }
};

Now assume that the following variables are defined: 

Santa*  var1 = new Frosty();
Frosty* var2 = new Grinch();
Santa*  var3 = new Grinch();
Santa*  var4 = new Rudolph();

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();
var1->m3();
var2->m1();
var2->m2();
var2->m3();
var3->m2();
var4->m1();
((Frosty*) var1)->m1();
((Frosty*) var1)->m4();
((Grinch*) var1)->m4();
((Grinch*) var2)->m4();
((Rudolph*) var3)->m2();

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