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 C and C++ standards do not support this feature. However, the GNU Compiler Collection (GCC) includes a non-standard extension for doing this, as described in the Labels as Values section of the Using the GNU Compiler Collection manual. Essentially, they have added a special unary operator && that reports the address of the label … Read more
If it would be possible at all, it would be very dependent on the javascript engine. The more modern javascript engine compile their code using a just in time compiler and messing with their internal variables would be either bad for performance, or bad for stability. If the engine allows it, why not make a … Read more
To print address in pointer to pointer: printf(“%p”,emp1) to dereference once and print the second address: printf(“%p”,*emp1) You can always verify with debugger, if you are on linux use ddd and display memory, or just plain gdb, you will see the memory address so you can compare with the values in your pointers.
id is the method you want to use: to convert it to hex: hex(id(variable_here)) For instance: x = 4 print hex(id(x)) Gave me: 0x9cf10c Which is what you want, right? (Fun fact, binding two variables to the same int may result in the same memory address being used.) Try: x = 4 y = 4 … 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
Use std::addressof. You can think of it as doing the following behind the scenes: Reinterpret the object as a reference-to-char Take the address of that (won’t call the overload) Cast the pointer back to a pointer of your type. Existing implementations (including Boost.Addressof) do exactly that, just taking additional care of const and volatile qualification.
&& is new in C++11. int&& a means “a” is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes a r-value expression. If you don’t know what an r-value is, the simple explanation is that it doesn’t have a memory address. E.g. the number 6, … Read more
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