Beispiele 24.10.2022

20221024/higher-math-1.c

+#include <stdio.h>
+
+#define VIER 4
+
+int main (void)
+{
+  printf ("2 + 2 = %d\n", VIER);
+  return 0;
+}

20221024/higher-math-2.c

+#include <stdio.h>
+
+#define wuppdich printf
+#define holla main
+#define pruzzel return
+#define VIER 4
+
+int holla (void)
+{
+  wuppdich ("2 + 2 = %d\n", VIER);
+  pruzzel 0;
+}

20221024/higher-math-3.c

+#include <stdio.h>
+
+#define VIER 2 + 2
+
+int main (void)
+{
+  printf ("2 + 3 * 4 = %d\n", 2 + 3 * VIER);
+  return 0;
+}

20221024/higher-math-4.c

+#include <stdio.h>
+
+#define VIER (2 + 2)
+
+int main (void)
+{
+  printf ("2 + 3 * 4 = %d\n", 2 + 3 * VIER);
+  return 0;
+}

20221024/higher-math-5.c

+#include <stdio.h>
+
+#define VIER (2 + 2));
+
+int main (void)
+{
+  printf ("2 + 3 * 4 = %d\n", 2 + 3 * VIER
+  return 0;
+}

20221024/string-ops-29.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char buffer[100] = "";
+  sprintf (buffer, "Die Antwort lautet: %d", 42);
+  printf ("%s\n", buffer);
+
+  return 0;
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+}

20221024/string-ops-30.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char buffer[100] = "";
+  snprintf (buffer, 100, "Die Antwort lautet: %d", 42);
+  printf ("%s\n", buffer);
+
+  return 0;
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+}

20221024/string-ops-31.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char buffer[20] = "";
+  snprintf (buffer, 20, "Die Antwort lautet: %d", 42);
+  printf ("%s\n", buffer);
+
+  return 0;
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+}

20221024/string-ops-32.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char buffer[20] = "";
+  snprintf (buffer, 20, "Die Antwort lautet: %d", 42);
+  printf ("%s\n", buffer);
+
+  for (int i = 0; i < 20; i++)
+    printf ("%d ", buffer[i]);
+  printf ("\n");
+
+  return 0;
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+}

20221024/string-ops-33.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char buffer[100] = "";
+  snprintf (buffer, 100, "Die Antwort lautet: %d", 42);
+  printf ("%s\n", buffer);
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+
+  return 0;
+}

20221024/string-ops-34.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer = strstr (buffer, "Antwort");
+  printf ("%s\n", answer);
+  printf ("found at: %zd\n", answer - buffer);
+
+  return 0;
+}

20221024/string-ops-35.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer = strstr (buffer, "Antwort");
+  while (answer)
+    {
+      printf ("%s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      buffer = answer;
+    }
+
+  return 0;
+}

20221024/string-ops-36.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer = strstr (buffer, "Antwort");
+  while (answer)
+    {
+      printf ("%s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      buffer = answer + strlen ("Antwort");
+    }
+
+  return 0;
+}

20221024/string-ops-37.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      answer = strstr (buffer, "Antwort");
+      printf ("%s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      buffer = answer + strlen ("Antwort");
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-38.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      answer = strstr (buffer, "Antwort");
+      printf ("%s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      if (strlen (answer) > strlen ("Antwort"))
+        buffer = answer + strlen ("Antwort");
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-39.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      printf ("am Anfang der Schleife\n");
+      answer = strstr (buffer, "Antwort");
+      printf ("%s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      if (strlen (answer) > strlen ("Antwort"))
+        buffer = answer + strlen ("Antwort");
+
+      printf ("am Ende der Schleife\n");
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-40.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      printf ("am Anfang der Schleife\n");
+      answer = strstr (buffer, "Antwort");
+      printf ("answer = %s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      if (strlen (answer) > strlen ("Antwort"))
+        buffer = answer + strlen ("Antwort");
+
+      printf ("am Ende der Schleife\n");
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-41.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      printf ("am Anfang der Schleife\n");
+      answer = strstr (buffer, "Antwort");
+      if (answer)
+        {
+          printf ("answer = %s\n", answer);
+          printf ("found at: %zd\n", answer - buffer);
+
+          if (strlen (answer) > strlen ("Antwort"))
+            buffer = answer + strlen ("Antwort");
+        }
+      printf ("am Ende der Schleife\n");
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-42.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      answer = strstr (buffer, "Antwort");
+      if (answer)
+        {
+          printf ("answer = %s\n", answer);
+          printf ("found at: %zd\n", answer - buffer);
+
+          if (strlen (answer) > strlen ("Antwort"))
+            buffer = answer + strlen ("Antwort");
+        }
+    }
+  while (answer);
+
+  return 0;
+}

20221024/string-ops-43.c

+#include <stdio.h>
+#include <string.h>
+
+int main (void)
+{
+  char *buffer = "Wie lautet die Antwort aller Antworten?";
+
+  char *answer;
+  do
+    {
+      answer = strstr (buffer, "Antwort");
+      if (!answer)
+        break;
+      
+      printf ("answer = %s\n", answer);
+      printf ("found at: %zd\n", answer - buffer);
+
+      if (strlen (answer) > strlen ("Antwort"))
+        buffer = answer + strlen ("Antwort");
+    }
+  while (answer);
+
+  return 0;
+}