June 2018 Update

Task/Address-of-a-variable/C/address-of-a-variable-2.c

@@ -1 +1,3 @@
-int& i = *(int*)0xA100;
+#include <memory>
+int i;
+auto address_of_i = std::addressof(i);

Task/Address-of-a-variable/C/address-of-a-variable-3.c

@@ -1,5 +1 @@
-static union
-{
-  int i;
-  int j;
-};
+int& i = *(int*)0xA100;

Task/Address-of-a-variable/C/address-of-a-variable-4.c

@@ -1,2 +1,3 @@
-int i;
-int& j = i;
+#include <new>
+struct S { int i = 0; S() {} };
+auto& s = *new (reinterpret_cast<void*>(0xa100)) S;

Task/Address-of-a-variable/C/address-of-a-variable-5.c

@@ -0,0 +1,5 @@
+static union
+{
+  int i;
+  int j;
+};

Task/Address-of-a-variable/C/address-of-a-variable-6.c

@@ -0,0 +1,2 @@
+int i;
+int& j = i;

Task/Address-of-a-variable/C/address-of-a-variable-7.c

@@ -0,0 +1,4 @@
+#include <cstring>
+inline float read_as_float(int const& i) { float f; memcpy(&f, &i, sizeof(f)); return f; }
+int i = 0x0a112233;
+float f = read_as_float(i);