Beispiele und Tafelbilder 25.3.2025

20250325/arrays-and-pointers-07.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[] = "Test";
+  char *p = "Test";
+  printf ("%016zx %016zx %016zx %016zx\n", (size_t) &a, (size_t) a, (size_t) &p, (size_t) p);
+  p = a;                // OK: Das Array selbst = Adresse eines Elements
+  printf ("%s\n", p);
+  p = &a;               // Warnung: Adresse des Arrays (falscher Typ, aber dieselbe Adresse)
+  printf ("%s\n", p);
+  return 0;
+}

20250325/arrays-and-pointers-08.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", a[i]);
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", p[i]);
+  return 0;
+}

20250325/arrays-and-pointers-09.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", a[i]);
+  for (char **p = a; p < a + 4; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20250325/arrays-and-pointers-10.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", a[i]);
+  return 0;
+}

20250325/arrays-and-pointers-11.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", p[i]);
+  return 0;
+}

20250325/arrays-and-pointers-12.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  char *p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", p[i]);
+  return 0;
+}

20250325/arrays-and-pointers-13.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  char *p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", &p[i]);
+  return 0;
+}

20250325/arrays-and-pointers-14.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  char *p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", &p[5 * i]);
+  return 0;
+}

20250325/arrays-and-pointers-15.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  for (char *p = a; p < a + 20; p += 5)
+    printf ("%s\n", p);
+  return 0;
+}

20250325/arrays-and-pointers-16.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  for (char *p = a; p < a + 4; p += 5)
+    printf ("%s\n", p);
+  return 0;
+}

20250325/arrays-and-pointers-17.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  for (char *p = (char *) a; p < (char *) a + 20; p += 5)
+    printf ("%s\n", p);
+  return 0;
+}

20250325/arrays-and-pointers-18.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", p);
+  return 0;
+}

20250325/arrays-and-pointers-19.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", &p[0]);
+  return 0;
+}

20250325/arrays-and-pointers-20.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", &(p[0]));
+  return 0;
+}

20250325/arrays-and-pointers-21.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", &p[0][0]);
+  return 0;
+}

20250325/arrays-and-pointers-22.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", &**p);
+  return 0;
+}

20250325/arrays-and-pointers-23.c

+#include <stdio.h>
+
+int main (void)
+{
+  typedef char string5[5];
+  string5 a[] = { "Dies", "ist", "ein", "Test" };
+  for (string5 *p = a; p < a + 4; p++)
+    printf ("%s\n", *p);
+  return 0;
+}