Ergänzung (13.4.2023) der Beispiele vom 6.4.2023

20230406/destructors-03a.cpp

+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+class TString
+{
+private:
+  char *content;
+public:
+  void print ()
+  {
+    printf ("%s\n", content);
+  }
+  TString (const char *s = "Hello, world!")
+  {
+    printf ("Constructing TString object\n");
+    content = (char *) malloc (strlen (s));
+    strcpy (content, s);
+  }
+  virtual ~TString ()
+  {
+    printf ("Destructing TString object\n");
+    free (content);
+    content = NULL;
+  }
+};
+
+int bye ()
+{
+  printf ("Bye!\n");
+  return 0;
+}
+
+void do_something ()
+{
+  TString s = "Hallo, Welt!";
+  s.print ();
+}
+
+int main ()
+{
+  for (int i = 0; i < 1000; i++)
+    do_something ();
+  return bye ();
+}

20230406/destructors-03b.cpp

+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+class TString
+{
+private:
+  char *content;
+public:
+  void print ()
+  {
+    printf ("%s\n", content);
+  }
+  TString (const char *s = "Hello, world!")
+  {
+    printf ("Constructing TString object\n");
+    content = (char *) malloc (strlen (s));
+    strcpy (content, s);
+  }
+  virtual ~TString ()
+  {
+    printf ("Destructing TString object\n");
+    free (content);
+    content = NULL;
+  }
+};
+
+int bye ()
+{
+  printf ("Bye!\n");
+  return 0;
+}
+
+void do_something ()
+{
+  TString *s = new TString ("Hallo, Welt!");
+  s->print ();
+  delete s;
+}
+
+int main ()
+{
+  for (int i = 0; i < 1000; i++)
+    do_something ();
+  return bye ();
+}

20230406/destructors-03c.cpp

+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+class TString
+{
+private:
+  char *content;
+public:
+  void print ()
+  {
+    printf ("%s\n", content);
+  }
+  TString (const char *s = "Hello, world!")
+  {
+    printf ("Constructing TString object\n");
+    content = (char *) malloc (strlen (s));
+    strcpy (content, s);
+  }
+  virtual ~TString ()
+  {
+    printf ("Destructing TString object\n");
+    free (content);
+    content = NULL;
+  }
+};
+
+int bye ()
+{
+  printf ("Bye!\n");
+  return 0;
+}
+
+int very_important_condition ()
+{
+  return 1;
+}
+
+void do_something ()
+{
+  printf ("Hi!\n");
+  if (very_important_condition ())
+    {
+      TString s = "Hallo, Welt!";
+      s.print ();
+    }
+  printf ("Bye?\n");
+}
+
+int main ()
+{
+  for (int i = 0; i < 1; i++)
+    do_something ();
+  return bye ();
+}

20230406/destructors-03d.cpp

+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+class TString
+{
+private:
+  char *content;
+public:
+  void print ()
+  {
+    printf ("%s\n", content);
+  }
+  TString (const char *s = "Hello, world!")
+  {
+    printf ("Constructing TString object\n");
+    content = (char *) malloc (strlen (s));
+    strcpy (content, s);
+  }
+  virtual ~TString ()
+  {
+    printf ("Destructing TString object\n");
+    free (content);
+    content = NULL;
+  }
+};
+
+int bye ()
+{
+  printf ("Bye!\n");
+  return 0;
+}
+
+int very_important_condition ()
+{
+  return 1;
+}
+
+void do_something ()
+{
+  printf ("Hi!\n");
+  if (very_important_condition ())
+    {
+      TString *s = new TString ("Hallo, Welt!");
+      s->print ();
+    }
+  printf ("Bye?\n");
+}
+
+int main ()
+{
+  for (int i = 0; i < 1; i++)
+    do_something ();
+  return bye ();
+}

20230406/destructors-03e.cpp

+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+class TString
+{
+private:
+  char *content;
+public:
+  void print ()
+  {
+    printf ("%s\n", content);
+  }
+  TString (const char *s = "Hello, world!")
+  {
+    printf ("Constructing TString object\n");
+    content = (char *) malloc (strlen (s));
+    strcpy (content, s);
+  }
+  virtual ~TString ()
+  {
+    printf ("Destructing TString object\n");
+    free (content);
+    content = NULL;
+  }
+};
+
+int bye ()
+{
+  printf ("Bye!\n");
+  return 0;
+}
+
+int very_important_condition ()
+{
+  return 1;
+}
+
+void do_something ()
+{
+  printf ("Hi!\n");
+  if (very_important_condition ())
+    {
+      TString *s = new TString ("Hallo, Welt!");
+      s->print ();
+      delete s;
+    }
+  printf ("Bye?\n");
+}
+
+int main ()
+{
+  for (int i = 0; i < 1; i++)
+    do_something ();
+  return bye ();
+}

20230406/iterators-08a.cpp

+#include <iostream>
+#include <vector>
+
+int main ()
+{
+  std::vector <int> prime = { { 2, 3, 5, 7, 11 } };
+  for (auto *p : prime)
+    std::cout << *p << std::endl;
+  prime.push_back (13);
+  prime.push_back (17);
+  for (auto *p : prime)
+    std::cout << *p << std::endl;
+  return 0;
+}

20230406/iterators-09a.cpp

+#include <iostream>
+#include <set>
+
+int main ()
+{
+  std::set <int> prime = { { 2, 3, 5, 7, 11 } };
+  for (auto &p : prime)
+    std::cout << p << std::endl;
+  prime.push_back (13);
+  prime.push_back (17);
+  for (auto &p : prime)
+    std::cout << p << std::endl;
+  return 0;
+}

20230406/iterators-09b.cpp

+#include <iostream>
+#include <set>
+
+int main ()
+{
+  std::set <int> prime = { { 2, 3, 5, 7, 11 } };
+  for (auto &p : prime)
+    std::cout << p << std::endl;
+  prime.insert (prime.end (), 13);
+  prime.insert (prime.end (), 17);
+  for (auto &p : prime)
+    std::cout << p << std::endl;
+  return 0;
+}