cpp/cs104/inheritance/con

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Description
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Class C inherits from B which inherits from A.
<p>
For the object allocations and deallocations in main(), predict what will be printed by the constructors and destructors.
<p>
Remember:
<ul>
<li>Constructors start at the base and work outward.</li>
<li>Destructors start at the outer-most level and work inward.</li>
</ul>
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Copied from problem cpp/cs104/inheritance/person_stu_ex (author: redekopp@usc.edu)

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Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

Template / Reference solution

#include <iostream>
using namespace std;
\[
REDACTED
\show:
#include <iostream>
using namespace std;

class A {
int a;
public:
A() { a=0; cout << "A:" << a << endl; }
~A() { cout << "~A" << endl; }
A(int mya) { a = mya; cout << "A:" << a << endl; }
};

class B : public A {
int b;
public:
B() { b = 0; cout << "B:" << b << endl; }
~B() { cout << "~B "; }
B(int myb) { b = myb; cout << "B:" << b << endl; }
};

class C : public B {
int c;
public:
C() { c = 0; cout << "C:" << c << endl; }
~C() { cout << "~C "; }
C(int myb, int myc) : B(myb) { c = myc; cout << "C:" << c << endl; }
};

int main()
{
cout << "Allocating a B object" << endl;
B b1;
cout << "Allocating first C object" << endl;
C* c1 = new C;
cout << "Allocating second C object" << endl;
C c2(4,5);
cout << "Deleting c1 object" << endl;
delete c1;
cout << "Quitting" << endl;
return 0;
}
]\
Java test suite
See manual

C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]
to just run once with no input use [{}]

[{}]
C++ test suite
See manual

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e.g. ["for","while"]

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i.e., just a demo
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see default_cppflags
e.g. ["-Wno-write-strings"]

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Property	Value
Description html markup shown to student	Class C inherits from B which inherits from A. <p> For the object allocations and deallocations in main(), predict what will be printed by the constructors and destructors. <p> Remember: <ul> <li>Constructors start at the base and work outward.</li> <li>Destructors start at the outer-most level and work inward.</li> </ul>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	Copied from problem cpp/cs104/inheritance/person_stu_ex (author: redekopp@usc.edu) remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution
Template / Reference solution	#include <iostream> using namespace std; \[ REDACTED \show: #include <iostream> using namespace std; class A { int a; public: A() { a=0; cout << "A:" << a << endl; } ~A() { cout << "~A" << endl; } A(int mya) { a = mya; cout << "A:" << a << endl; } }; class B : public A { int b; public: B() { b = 0; cout << "B:" << b << endl; } ~B() { cout << "~B "; } B(int myb) { b = myb; cout << "B:" << b << endl; } }; class C : public B { int c; public: C() { c = 0; cout << "C:" << c << endl; } ~C() { cout << "~C "; } C(int myb, int myc) : B(myb) { c = myc; cout << "C:" << c << endl; } }; int main() { cout << "Allocating a B object" << endl; B b1; cout << "Allocating first C object" << endl; C* c1 = new C; cout << "Allocating second C object" << endl; C c2(4,5); cout << "Deleting c1 object" << endl; delete c1; cout << "Quitting" << endl; return 0; } ]\
Java test suite See manual
C++ test suite json list of stdin/args tests e.g. `[{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]` to just run once with no input use `[{}]`	[{}]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	remove

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