Add code for Intro to C++ Object Model

Author: sdutoit

Presentations/Intro to C++ Object Model/demo_is_pod.cpp

@@ -0,0 +1,15 @@
+#include <iostream>
+#include <type_traits>
+using std::cout;
+
+struct Complex
+{
+  float real;
+  float imag;
+};
+
+int main()
+{
+  cout<<"is Complex a POD? "<<
+    (std::is_pod<Complex>() ? "yes" : "no")<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_c_offset.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+typedef struct
+{
+  float real;
+  float imag;
+} Complex;
+
+int main()
+{
+  Complex c;
+  printf("address of c: %p\n", &c);
+  printf("address of c.real: %p\n", &c.real);
+  printf("address of c.imag: %p\n", &c.imag);
+}

Presentations/Intro to C++ Object Model/quiz_c_size.c

@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+typedef struct
+{
+  float real;
+  float imag;
+} Complex;
+
+int main()
+{
+  printf("sizeof(float): %ld\n", sizeof(float));
+  printf("sizeof(Complex): %ld\n", sizeof(Complex));
+}

Presentations/Intro to C++ Object Model/quiz_ctor.cpp

@@ -0,0 +1,19 @@
+#include <iostream>
+using std::cout;
+
+struct Erdos
+{
+  Erdos() { whoAmIReally(); }
+  virtual void whoAmIReally() { cout<<"I really am Erdos\n"; }
+};
+
+struct Fermat : public Erdos
+{
+  virtual void whoAmIReally() { cout<<"I really am Fermat\n"; }
+};
+
+int main()
+{
+  Erdos e;
+  Fermat f;
+}

Presentations/Intro to C++ Object Model/quiz_derived.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+using std::cout;
+
+struct Complex
+{
+  float real;
+  float imag;
+};
+
+struct Derived : public Complex
+{
+  float angle;
+};
+
+int main()
+{
+  cout<<"sizeof(float): "<<sizeof(float)<<"\n";
+  cout<<"sizeof(Complex): "<<sizeof(Complex)<<"\n";
+  cout<<"sizeof(Derived): "<<sizeof(Derived)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_mem_func.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+#include <cmath>
+using std::cout;
+
+struct Complex
+{
+  float Abs() const { return std::hypot(real, imag); }
+  float real;
+  float imag;
+};
+
+int main()
+{
+  cout<<"sizeof(float): "<<sizeof(float)<<"\n";
+  cout<<"sizeof(Complex): "<<sizeof(Complex)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_offset1.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+using std::cout;
+
+struct Complex
+{
+  float real;
+  float imag;
+};
+
+int main()
+{
+  Complex c;
+  cout<<"address of c: "<<&c<<"\n";
+  cout<<"address of c.real: "<<&c.real<<"\n";
+  cout<<"address of c.imag: "<<&c.imag<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_offset2.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+using std::cout;
+
+struct Complex
+{
+  float real;
+  float imag;
+};
+
+struct Derived : public Complex
+{
+  float angle;
+};
+
+int main()
+{
+  Derived d;
+  cout<<"address of d: "<<(&d)<<"\n";
+  cout<<"address of d.real: "<<(&d.real)<<"\n";
+  cout<<"address of d.imag: "<<(&d.imag)<<"\n";
+  cout<<"address of d.angle: "<<(&d.angle)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_offset3.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+#include <cmath>
+using std::cout;
+
+struct Complex
+{
+  virtual ~Complex() = default;
+  virtual float Abs() { return std::hypot(real, imag); }
+  float real;
+  float imag;
+};
+
+struct Derived : public Complex
+{
+  virtual ~Derived() = default;
+  virtual float Abs() { return std::hypot(std::hypot(real, imag), angle); }
+  float angle;
+};
+
+int main()
+{
+  Derived d;
+  cout<<"address of d: "<<(&d)<<"\n";
+  cout<<"address of d.real: "<<(&d.real)<<"\n";
+  cout<<"address of d.imag: "<<(&d.imag)<<"\n";
+  cout<<"address of d.angle: "<<(&d.angle)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_size1.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+
+struct Complex
+{
+  float real;
+  float imag;
+};
+
+int main()
+{
+  std::cout<<"sizeof(float): "<<sizeof(float)<<"\n";
+  std::cout<<"sizeof(Complex): "<<sizeof(Complex)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_size3.cpp

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <cmath>
+using std::cout;
+
+struct Complex
+{
+  virtual ~Complex() = default;
+  virtual float Abs() { return std::hypot(real, imag); }
+  float real;
+  float imag;
+};
+
+struct Derived : public Complex
+{
+  virtual ~Derived() = default;
+  virtual float Abs() { return std::hypot(std::hypot(real, imag), angle); }
+  float angle;
+};
+
+int main()
+{
+  cout<<"sizeof(float): "<<sizeof(float)<<"\n";
+  cout<<"sizeof(void*): "<<sizeof(void*)<<"\n";
+  cout<<"sizeof(Complex): "<<sizeof(Complex)<<"\n";
+  cout<<"sizeof(Derived): "<<sizeof(Derived)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_size_class.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+using std::cout;
+
+class Complex
+{
+  float real;
+  float imag;
+};
+
+int main()
+{
+  cout<<"sizeof(float): "<<sizeof(float)<<"\n";
+  cout<<"sizeof(Complex): "<<sizeof(Complex)<<"\n";
+}

Presentations/Intro to C++ Object Model/quiz_virtual1.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+using std::cout;
+
+struct Erdos
+{
+  void whoAmI() { cout<<"I am Erdos\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Erdos\n"; }
+};
+
+struct Fermat : public Erdos
+{
+  void whoAmI() { cout<<"I am Fermat\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Fermat\n"; }
+};
+
+int main()
+{
+  Erdos e;
+  e.whoAmI();
+  e.whoAmIReally();
+
+  Fermat f;
+  f.whoAmI();
+  f.whoAmIReally();
+}

Presentations/Intro to C++ Object Model/quiz_virtual2.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+using std::cout;
+
+struct Erdos
+{
+  void whoAmI() { cout<<"I am Erdos\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Erdos\n"; }
+};
+
+struct Fermat : public Erdos
+{
+  void whoAmI() { cout<<"I am Fermat\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Fermat\n"; }
+};
+
+int main()
+{
+  Fermat f;
+  f.whoAmI();
+  f.whoAmIReally();
+
+  Erdos& e = f;
+  e.whoAmI();
+  e.whoAmIReally();
+}

Presentations/Intro to C++ Object Model/quiz_virtual3.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+using std::cout;
+
+struct Erdos
+{
+  void whoAmI() { cout<<"I am Erdos\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Erdos\n"; }
+};
+
+struct Fermat : public Erdos
+{
+  void whoAmI() { cout<<"I am Fermat\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Fermat\n"; }
+};
+
+int main()
+{
+  Erdos * e1 = new Erdos;
+  e1->whoAmI();
+  e1->whoAmIReally();
+
+  Erdos * e2 = new Fermat;
+  e2->whoAmI();
+  e2->whoAmIReally();
+}

Presentations/Intro to C++ Object Model/quiz_virtual4.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+using std::cout;
+
+struct Erdos
+{
+  void whoAmI() { cout<<"I am Erdos\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Erdos\n"; }
+};
+
+struct Fermat : public Erdos
+{
+  void whoAmI() { cout<<"I am Fermat\n"; }
+  virtual void whoAmIReally() { cout<<"I really am Fermat\n"; }
+};
+
+int main()
+{
+  using std::unique_ptr;
+  using std::make_unique;
+
+  unique_ptr<Erdos> e = make_unique<Erdos>();
+  e->whoAmI();
+  e->whoAmIReally();
+
+  unique_ptr<Fermat> f = make_unique<Fermat>();
+  f->whoAmI();
+  f->whoAmIReally();
+}