Beispiele 7.11.2024

20241107/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;
+}

20241107/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;
+}

20241107/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;
+}

20241107/arrays-04.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;
+}

20241107/arrays-05.c

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

20241107/arrays-06.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  for (int *p = prime; p < prime + 20; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241107/arrays-07.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[5] = { 2, 3, 5, 7, 11 };
+  for (int *p = prime; p < prime + 200000; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241107/arrays-08.c

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

20241107/arrays-09.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[6] = { 2, 3, 5, 7, 11, -1 };
+  for (int *p = prime; *p >= 0; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241107/arrays-10.c

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

20241107/arrays-11.c

+#include <stdio.h>
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11, -1 };
+  for (int *p = prime; p < prime + 200000; p++)
+    printf ("%d\n", *p);
+  return 0;
+}

20241107/arrays-12.c

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

20241107/arrays-13.c

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

20241107/arrays-14.c

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

20241107/arrays-15.c

+#include <stdio.h>
+
+void output (int prime[], int size)
+{
+  for (int *p = prime; p < prime + size; p++)
+    printf ("%d\n", *p);
+}
+
+int main (void)
+{
+  int prime[] = { 2, 3, 5, 7, 11 };
+  output (prime, 200000);
+  return 0;
+}

20241107/arrays-16.c

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

20241107/pointers-01.c

+#include <stdio.h>
+
+void calc_answer (int *a)
+{
+  *a = 42;
+}
+
+int main (void)
+{
+  int answer;
+  calc_answer (&answer);
+  printf ("The answer is %d.\n", answer);
+  return 0;
+}

20241107/pointers-02.c

+#include <stdio.h>
+
+void calc_answer (int *a)
+{
+  *a = 42;
+}
+
+int main (void)
+{
+  int answer;
+  calc_answer (answer);
+  printf ("The answer is %d.\n", answer);
+  return 0;
+}

20241107/pointers-03.c

+#include <stdio.h>
+
+void calc_answer (int *a)
+{
+  *a = 42;
+}
+
+int main (void)
+{
+  int answer;
+  printf ("The unitialised answer is %d.\n", answer);
+  calc_answer (answer);
+  printf ("The answer is %d.\n", answer);
+  return 0;
+}

20241107/strings-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  char hello[] = "Hello, world!\n";
+  for (char *p = hello; *p; p++)
+    printf ("%d", *p);
+  return 0;
+}