Klausur vom Wintersemester 2015/16: Beispiel-Programme

20170130/aufgabe-1.c

+#include <stdio.h>
+#include <string.h>
+
+void fun (char *s)
+{
+  int len = strlen (s);
+  for (int i = 0; i < len; i++)
+    for (int j = i + 1; j < len; j++)
+      if (s[i] > s[j])
+        {
+          char sx = s[i];
+          s[i] = s[j];
+          s[j] = sx;
+        }
+}
+
+int main (void)
+{
+  char s[] = "Informatik";
+  fun (s);
+  printf ("%s\n", s);
+  return 0;
+}

20170130/aufgabe-1c.c

+#include <stdio.h>
+#include <string.h>
+
+void fun (char *s)
+{
+  int len = strlen (s);
+  for (int i = 0; i < len; i++)
+    for (int j = i + 1; j < len; j++)
+      if (s[i] > s[j])
+        {
+          char sx = s[i];
+          s[i] = s[j];
+          s[j] = sx;
+        }
+}
+
+int main (void)
+{
+  char s[] = { 'I', 'n', 'f', 'o' };
+  fun (s);
+  printf ("%s\n", s);
+  return 0;
+}

20170130/aufgabe-2.c

+#include <stdio.h>
+#include <stdint.h>
+
+void output (uint16_t *a)
+{
+  for (int i = 0; a[i]; i++)
+    printf (" %d", a[i]);
+  printf ("\n");
+}
+
+int main (void)
+{
+  uint16_t prime_numbers[] = { 2, 3, 5, 7, 11, 13, 17, 0 };
+
+  uint16_t *p1 = prime_numbers;
+  output (p1);
+  p1++;
+  output (p1);
+
+  char *p2 = prime_numbers;
+  output (p2);
+  p2++;
+  output (p2);
+
+  return 0;
+}

20170130/aufgabe-3.c

+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct
+{
+  char symbol;
+  int (*calculate) (int a, int b);
+}
+operation;
+
+operation *new_operation (void)
+{
+  operation *op = malloc (sizeof (operation));
+  op->symbol = '?';
+  op->calculate = NULL;
+  return op;
+}
+
+[...]
+
+int main (void)
+{
+  operation *op[4];
+  op[0] = new_plus ();
+  op[1] = new_minus ();
+  op[2] = new_times ();
+  op[3] = NULL;
+  for (int i = 0; op[i]; i++)
+    printf ("2 %c 3 = %d\n", op[i]->symbol, op[i]->calculate (2, 3));
+  return 0;
+}

20170130/aufgabe-4.xbm

+#define aufgabe_4_width 14
+#define aufgabe_4_height 14
+static unsigned char aufgabe_4_bits[] = {
+   0x00, 0x00, 0xf0, 0x03, 0x08, 0x04, 0x04, 0x08, 0x02, 0x10, 0x32, 0x13,
+   0x22, 0x12, 0x02, 0x10, 0x0a, 0x14, 0x12, 0x12, 0xe4, 0x09, 0x08, 0x04,
+   0xf0, 0x03, 0x00, 0x00 };