Beispiele 31.10.2024

20241017/side-effects-15a.c

+#include <stdio.h>
+
+int main (void)
+{
+  int a = 42;
+  int b = 0;
+  printf ("a = 42\nBitte b eingeben: ");
+  scanf ("%d", &b);
+  if (b)
+    printf ("a / b = %d\n", a / b);
+  else
+    b = (printf ("Bitte nicht durch 0 dividieren!\n"),
+    printf ("Das macht man nicht!\n"));
+  printf ("Haupteffekt = %d\n", b);
+  return 0;
+}

20241017/side-effects-15b.c

+#include <stdio.h>
+
+int main (void)
+{
+  int a = 42;
+  int b = 0;
+  printf ("a = 42\nBitte b eingeben: ");
+  scanf ("%d", &b);
+  if (b)
+    printf ("a / b = %d\n", a / b);
+  else
+    b = printf ("Bitte nicht durch 0 dividieren!\n"),
+    printf ("Das macht man nicht!\n");
+  printf ("Haupteffekt = %d\n", b);
+  return 0;
+}

20241031/arrays-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  int *p = prime;
+  for (int i = 0; i < 5; i++)
+    printf ("%d\n", *(p + i));
+  return 0;
+}

20241031/arrays-02.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  int *p = prime;
+  for (int i = 0; i < 5; i++)
+    printf ("%d\n", p[i]);
+  return 0;
+}

20241031/arrays-03.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  for (int i = 0; i < 5; i++)
+    printf ("%d\n", prime[i]);
+  return 0;
+}

20241031/arrays-04.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  for (int i = 0; i < 7; i++)
+    printf ("%d\n", prime[i]);
+  return 0;
+}

20241031/arrays-05.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  for (int *p = prime; p < prime + 5; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241031/arrays-06.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11, 0 };
+  for (int *p = prime; *p != 0; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241031/arrays-07.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  for (int *p = prime; *p != 0; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241031/arrays-08.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  for (int i = 0; i < 6; i++)
+    if (prime[i] != 0)
+      printf ("%d\n", prime[i]);
+  return 0;
+}

20241031/arrays-09.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  for (int i = 0; prime[i] != 0; i++)
+    if (prime[i] != 0)
+      printf ("%d\n", prime[i]);
+  return 0;
+}

20241031/arrays-10.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  int i = 0;
+  while (1)
+    {
+      if (prime[i] == 0)
+        break;
+      printf ("%d\n", prime[i]);
+    }
+  return 0;
+}

20241031/arrays-11.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  int i = 0;
+  while (1)
+    {
+      if (prime[i] == 0)
+        break;
+      printf ("%d\n", prime[i]);
+      i++;
+    }
+  return 0;
+}

20241031/arrays-12.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  for (int i = 0; prime[i]; i++)
+    printf ("%d\n", prime[i]);
+  return 0;
+}

20241031/arrays-13.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, 0 };
+  for (int *p = prime; *p; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241031/functions-01.c

+#include <stdio.h>
+
+int answer (void)
+{
+  return 42;
+}
+
+void foo (void)
+{
+  printf ("%d\n", answer ());
+}
+
+int main (void)
+{
+  foo ();
+  return 0;
+}

20241031/functions-02.c

+#include <stdio.h>
+
+int answer ()
+{
+  return 42;
+}
+
+void foo ()
+{
+  printf ("%d\n", answer ());
+}
+
+int main ()
+{
+  foo ();
+  return 0;
+}

20241031/functions-03.c

+#include <stdio.h>
+
+int answer ()
+{
+  return 42;
+}
+
+void foo ()
+{
+  printf ("%d\n", answer (137));
+}
+
+int main ()
+{
+  foo ("Hello, world!");
+  return 0;
+}

20241031/functions-04.c

+#include <stdio.h>
+
+int answer (void)
+{
+  return 42;
+}
+
+void foo (void)
+{
+  printf ("%d\n", answer (137));
+}
+
+int main (void)
+{
+  foo ("Hello, world!");
+  return 0;
+}

20241031/functions-05.c

+#include <stdio.h>
+
+int answer (void)
+{
+  return 42;
+}
+
+void foo (void)
+{
+  printf ("%d\n", answer ());
+}
+
+void main (void)
+{
+  foo ();
+}