Beispiele 9.10.2023

20231009/comma-operator-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  int a = 2;
+  int b = 3;
+  int c, d;
+  c = a + b,
+  d = a - b;
+  printf ("c = %d, d = %d\n", c, d);
+  return 0;
+}

20231009/comma-operator-02.c

+#include <stdio.h>
+
+int main (void)
+{
+  int a = 2;
+  int b = 3;
+  int c, d;
+  if (a > 0)
+    c = a + b,
+    d = a - b;
+  printf ("c = %d, d = %d\n", c, d);
+  return 0;
+}

20231009/countdown-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i = 0; i - 1)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-02.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i == 0; i--)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-03.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i >= 0; i--)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-04.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; i--)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-05.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; i -= 2)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-06.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; i----)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-07.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; --i--)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-08.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; ----i)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-09.c

+#include <stdio.h>
+
+int main (void)
+{
+  for (int i = 10; i != -1; --i,i--)
+    printf ("%d\n", i);
+  return 0;
+}

20231009/countdown-10.c

+#include <stdio.h>
+
+int main (void)
+{
+  int i = 10;
+  for (;;)
+    printf ("%d\n", i--);
+  return 0;
+}

20231009/fib-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  int i0 = 0;
+  int i1 = 1;
+  printf ("%d\n", i0);
+  printf ("%d\n", i1);
+  for (int i = 0; i < 50; i++)
+    {
+      int i2 = i0 + i1;
+      i0 = i1;
+      i1 = i2;
+      printf ("%d\n", i1);
+    }
+  return 0;
+}

20231009/hello.c

+#include <stdio.h>
+
+int main (void)
+{
+  printf ("Hello, world!\n");
+  return 0;
+}

20231009/leap-year-01.c

+#include <stdio.h>
+
+int is_leap_year (int year)
+{
+  if (year % 4 == 0)
+    {
+      if (year % 100 == 0)
+        {
+          if (year % 400 == 0)
+            return 1;
+          return 0;
+        }
+      return 1;
+    }
+  return 0;
+}
+
+int main (void)
+{
+  int year;
+  printf ("Jahr: ");
+  scanf ("%d", &year);
+  if (is_leap_year (year))
+    printf ("%d ist ein Schaltjahr.\n", year);
+  else
+    printf ("%d ist kein Schaltjahr.\n", year);
+  return 0;
+}

20231009/leap-year-02.c

+#include <stdio.h>
+
+int is_leap_year (int year)
+{
+  if (year % 4 == 0)
+    if (year % 100 == 0)
+      if (year % 400 == 0)
+        return 1;
+      else
+        return 0;
+    else
+      return 1;
+  else
+    return 0;
+}
+
+int main (void)
+{
+  int year;
+  printf ("Jahr: ");
+  scanf ("%d", &year);
+  if (is_leap_year (year))
+    printf ("%d ist ein Schaltjahr.\n", year);
+  else
+    printf ("%d ist kein Schaltjahr.\n", year);
+  return 0;
+}

20231009/leap-year-03.c

+#include <stdio.h>
+
+int is_leap_year (int year)
+{
+  return year % 4 == 0 && !(year % 100 == 0 && !(year % 400 == 0));
+}
+
+int main (void)
+{
+  int year;
+  printf ("Jahr: ");
+  scanf ("%d", &year);
+  if (is_leap_year (year))
+    printf ("%d ist ein Schaltjahr.\n", year);
+  else
+    printf ("%d ist kein Schaltjahr.\n", year);
+  return 0;
+}

20231009/leap-year-04.c

+#include <stdio.h>
+
+int is_leap_year (int year)
+return year % 4 == 0 && !(year % 100 == 0 && !(year % 400 == 0));
+
+int main (void)
+{
+  int year;
+  printf ("Jahr: ");
+  scanf ("%d", &year);
+  if (is_leap_year (year))
+    printf ("%d ist ein Schaltjahr.\n", year);
+  else
+    printf ("%d ist kein Schaltjahr.\n", year);
+  return 0;
+}

20231009/leap-year-05.c

+#include <stdio.h>
+
+int is_leap_year(int year){return year%4==0&&!(year%100==0&&!(year%400==0));}
+
+int main (void)
+{
+  int year;
+  printf ("Jahr: ");
+  scanf ("%d", &year);
+  if (is_leap_year (year))
+    printf ("%d ist ein Schaltjahr.\n", year);
+  else
+    printf ("%d ist kein Schaltjahr.\n", year);
+  return 0;
+}

20231009/leap-year-06.c

+#include <stdio.h>
+int is_leap_year(int year){return year%4==0&&!(year%100==0&&!(year%400==0));}int
+main(void){int year;printf("Jahr: ");scanf("%d",&year);if(is_leap_year(year))printf(
+"%d ist ein Schaltjahr.\n",year);else printf("%d ist kein Schaltjahr.\n",year);return 0;}