How do pointer-to-pointers work in C? (and when might you use …
May 22, 2009 · For example, when you wish to modify the value (address pointed to) of a pointer variable declared in a calling function's scope inside a called function. If you pass a single …
c - Pointer subtraction confusion - Stack Overflow
Jan 1, 2015 · This way pointer subtraction behaves is consistent with the behaviour of pointer addition. It means that p1 + (p2 - p1) == p2 (where p1 and p2 are pointers into the same …
c - Constant pointer vs Pointer to constant - Stack Overflow
Jan 31, 2014 · 2) Pointer to Constant : These type of pointers are the one which cannot change the value they are pointing to. This means they cannot change the value of the variable whose …
How to increment a pointer address and pointer's value?
But returns the old content *++ptr; // Pointer moves to the next int position, and then gets accessed, with your code, segfault *(++ptr); // Pointer moves to the next int position, and then …
What are the pointer-to-member operators ->* and .* in C++?
The pointer-to-member access operators, .* and ->*, are for dereferencing a pointer to member in combination with an object and a pointer to object, respectively. This description applies to …
c++ - What is the 'this' pointer? - Stack Overflow
this is a pointer that points to the object for which this function was called. For example, the function call A.max() will set the pointer this to the address of the object. The pointer this is …
Pointers in C: when to use the ampersand and the asterisk?
When an array expression appears as an operand to the & operator, the type of the resulting expression is "pointer to N-element array of T", or T (*)[N], which is different from an array of …
programming languages - What is a Pointer? - Stack Overflow
Oct 8, 2013 · A pointer is a simple implementation of the general reference data type (although it is quite different from the facility referred to as a reference in C++). Pointers to data improve …
How do function pointers in C work? - Stack Overflow
May 8, 2009 · A function pointer is a variable that contains the address of a function. Since it is a pointer variable though with some restricted properties, you can use it pretty much like you …
How can I use pointers in Java? - Stack Overflow
Nov 17, 2009 · This is StackOverlfow people! The definition of a pointer in computer science is (you can Google for this): "In computer science, a pointer is a programming language object, …