avoid UB by using + instead of array indexing

Thanks gnzlbg

diff --git a/ralf/_posts/2018-07-24-pointers-and-bytes.md b/ralf/_posts/2018-07-24-pointers-and-bytes.md
index 53daa57ce3a5a065bd35b39f51418eb2c144a321..85ba4aa679a615069221de05d17dc6a94a9f9669 100644 (file)
--- a/ralf/_posts/2018-07-24-pointers-and-bytes.md
+++ b/ralf/_posts/2018-07-24-pointers-and-bytes.md
@@ -56,7 +56,7 @@ int test() {
     auto x = new int[8];
     auto y = new int[8];
     y[0] = 42;
     auto x = new int[8];
     auto y = new int[8];
     y[0] = 42;

-    auto x_ptr = &x[8]; // one past the end
+    auto x_ptr = x+8; // one past the end

     if (x_ptr == &y[0])
       *x_ptr = 23;
     return y[0];
     if (x_ptr == &y[0])
       *x_ptr = 23;
     return y[0];