The Python manual has this to say about id(): Return the “identity” of an object. This is an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime. Two objects with non-overlapping lifetimes may have the same id() value. (Implementation note: this is the address of the … Read more
The C standard does not define what a pointer is internally and how it works internally. This is intentional so as not to limit the number of platforms, where C can be implemented as a compiled or interpreted language. A pointer value can be some kind of ID or handle or a combination of several … Read more
When t is used on its own in the expression, an array-to-pointer conversion takes place, this produces a pointer to the first element of the array. When t is used as the argument of the & operator, no such conversion takes place. The & then explicitly takes the address of t (the array). &t is … Read more
That is the class name and System.identityHashCode() separated by the ‘@’ character. What the identity hash code represents is implementation-specific. It often is the initial memory address of the object, but the object can be moved in memory by the VM over time. So (briefly) you can’t rely on it being anything. Getting the memory … Read more
Other answers already explained the issue. I am trying to explain it with some diagram. Hope this will help. When you declare an array int a[3] = {5, 4, 6} the memory arrangement looks like Now answering your question: a and &a have the same values.How? As you already know that a is of array … Read more
When you are taking the address of b, you get char *. operator<< interprets that as a C string, and tries to print a character sequence instead of its address. try cout << “address of char :” << (void *) &b << endl instead. [EDIT] Like Tomek commented, a more proper cast to use in … Read more
The simplest answer, assuming you don’t mind the vagaries and variations in format between different platforms, is the standard %p notation. The C99 standard (ISO/IEC 9899:1999) says in §7.19.6.1 ¶8: p The argument shall be a pointer to void. The value of the pointer is converted to a sequence of printing characters, in an implementation-defined … Read more