diff options
| -rw-r--r-- | c.html.markdown | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/c.html.markdown b/c.html.markdown index d243b19d..2b50efa0 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -230,10 +230,13 @@ printf("%p\n", &x); // Use & to retrieve the address of a variable // (%p formats a pointer) // => Prints some address in memory; -// Pointer types end with * in their declaration -int* px; // px is a pointer to an int + +// Pointers start with * in their declaration +int *px, not_a_pointer; // px is a pointer to an int px = &x; // Stores the address of x in px printf("%p\n", px); // => Prints some address in memory +printf("%d, %d\n", (int)sizeof(px), (int)sizeof(not_a_pointer)); +// => Prints "8, 4" on 64-bit system // To retreive the value at the address a pointer is pointing to, // put * in front to de-reference it. |