Beispielprogramme 10.12.2015

20151210/unions-1.c

+#include <stdio.h>
+
+int main (void)
+{
+  union
+  {
+    int a;
+    char b[4];
+  }
+  foo;
+  printf ("%d %d %d %d\n", foo.b[0], foo.b[1], foo.b[2], foo.b[3]);
+  foo.a = 16777216 + 512 + 42;
+  printf ("%d %d %d %d\n", foo.b[0], foo.b[1], foo.b[2], foo.b[3]);
+  return 0;
+}

20151210/unions-2.c

+#include <stdio.h>
+
+int main (void)
+{
+  union
+  {
+    int a;
+    char c;
+  }
+  foo;
+  printf ("%d\n", foo.c);
+  foo.a = 16777216 + 512 + 42;
+  printf ("%d\n", foo.c);
+  return 0;
+}

20151210/unions-3.c

+#include <stdio.h>
+
+int main (void)
+{
+  union
+  {
+    int a;
+    char b[4];
+  }
+  foo;
+  printf ("%d %d %d %d\n", foo.b[0], foo.b[1], foo.b[2], foo.b[3]);
+  foo.a = 16777316 + 137 + 46;
+  printf ("%d %d %d %d\n", foo.b[0], foo.b[1], foo.b[2], foo.b[3]);
+  return 0;
+}