Beispiel-Programme 15.11.2021

20211115/addresses-1.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = hello;
+  printf ("a = %lu\n", a);
+  return 0;
+}

20211115/addresses-2.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = hello;
+  uint32_t b = hello;
+  uint16_t c = hello;
+  uint8_t d = hello;
+  char e = hello;
+  printf ("a = %lu\n", a);
+  printf ("b = %u\n", b);
+  printf ("c = %hu\n", c);
+  printf ("d = %hhu\n", d);
+  printf ("e = %d\n", e);
+  return 0;
+}

20211115/addresses-3.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = hello;
+  uint32_t b = hello;
+  uint16_t c = hello;
+  uint8_t d = hello;
+  char e = hello;
+  printf ("a = %016lx\n", a);
+  printf ("b = %08x\n", b);
+  printf ("c = %04x\n", c);
+  printf ("d = %02x\n", d);
+  printf ("e = %02x\n", e);
+  return 0;
+}

20211115/addresses-4.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = (uint64_t) hello;
+  uint32_t b = (uint32_t) hello;
+  uint16_t c = (uint16_t) hello;
+  uint8_t d = (uint8_t)  hello;
+  char e = (char) hello;
+  printf ("a = %016lx\n", a);
+  printf ("b = %08x\n", b);
+  printf ("c = %04x\n", c);
+  printf ("d = %02x\n", d);
+  printf ("e = %02x\n", e);
+  return 0;
+}

20211115/addresses-5.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = (uint64_t) hello;
+  uint32_t b = (uint64_t) hello;
+  uint16_t c = (uint64_t) hello;
+  uint8_t d = (uint64_t)  hello;
+  char e = (uint64_t) hello;
+  printf ("a = %016lx\n", a);
+  printf ("b = %08x\n", b);
+  printf ("c = %04x\n", c);
+  printf ("d = %02x\n", d);
+  printf ("e = %02x\n", e);
+  return 0;
+}

20211115/addresses-6.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  uint64_t a = (size_t) hello;
+  uint32_t b = (size_t) hello;
+  uint16_t c = (size_t) hello;
+  uint8_t d = (size_t)  hello;
+  char e = (size_t) hello;
+  printf ("a = %016lx\n", a);
+  printf ("b = %08x\n", b);
+  printf ("c = %04x\n", c);
+  printf ("d = %02x\n", d);
+  printf ("e = %02x\n", e);
+  return 0;
+}

20211115/arrays-pointers-1.c

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

20211115/arrays-pointers-10.c

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

20211115/arrays-pointers-11.c

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

20211115/arrays-pointers-12.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  char p[] = { hello };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-13.c

+#include <stdio.h>
+
+int main (void)
+{
+  char p[14] = { '*' };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-14.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  char *p[14] = { hello };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p[1]);
+  return 0;
+}

20211115/arrays-pointers-15.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  char *p[14] = { hello };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p[0]);
+  return 0;
+}

20211115/arrays-pointers-16.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  char p[] = { hello - 150 };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-17.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hello, world!";
+  char p[] = { hello + 'a' };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-18.c

+#include <stdio.h>
+
+int main (void)
+{
+  char p[] = { 4 + 'a' };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-19.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *hello = "Hallo, Welt!";
+  char p[] = { hello + 'a' };  /* ein Element des Arrays initialisieren */
+  printf ("%s\n", p);
+  return 0;
+}

20211115/arrays-pointers-2.c

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

20211115/arrays-pointers-3.c

+#include <stdio.h>
+
+int main (void)
+{
+  int a = 3;
+  int b = a;
+  printf ("%d\n", b);
+  return 0;
+}

20211115/arrays-pointers-4.c

+#include <stdio.h>
+
+int a = 3;
+int b = a;
+
+int main (void)
+{
+  printf ("%d\n", b);
+  return 0;
+}