pointer elt

The return value of a function pointer is an array of pointers, where the return value of an int function pointer is an array of pointers, and an int pointer is placed in the array.#include #include voidFunintA) {printf ("fun:%d\ n", a);}voidFUN1 (void(*f) (int),intA) {f (a);}intGunintA) {printf ("gun:%d\ n", a);}intGUN1 (intAint(*f) (int) {printf ("gun1:%d\ n",

I. Review pointer concepts:As early as in the second part of this series, I have elaborated on the essence of pointers. Today, we need to learn a pointer that points to another pointer address. Let's review the pointer concept first!When our program declares the following variables:Short int I;Char;Short int * PI;The p

The pointer pointing to the pointer was said long ago, but later I found it hard for many people to understand it. This time we will go over the pointer pointing to the pointer again. Take a look at the following code and pay attention to the annotations in the Code: # Include # Include Using namespace STD;Void print_

people who use OSG know that OSG's memory management approach uses smart pointers that allow OSG to handle object destruction by means of smart pointers. There are two smart pointer types in OSG, one is the ref_ptr we are familiar with, and the other one may not always be used by many people, but it's really very good observer_ptr. Both of these types appear as smart pointers, so what's the difference between them? Why are there two things like that?

In the C language, it is easy for people to get dizzy when they encounter pointers. Especially, although I know the pointer myth and the C language, I also know the trouble of pointers. Today, when I read a book and saw a pointer to a function, I suddenly fell into a self-chaos state. This is an escape of psychological chaos! But I always need to understand it slowly, so I will try my best to summarize it

This article mainly introduces the C language of constant pointer and pointer constant difference, the need for friends can refer to A constant pointer refers to a pointer to a constant, as the name suggests, is the pointer to a constant, that is, it can not point to the va

In this paper, some techniques for understanding C + + pointer arrays, array pointers, array names, and two-dimensional arrays are analyzed in detail. is a more important concept, I believe that for everyone's C + + program design has a certain role in helping. First, about the array name Suppose you have an array: int a[3] = {1, 2, 3} 1. The array name represents the address of the first element of the array , noting that not the arra

A constant pointer to an object Declare the pointer variable to the object as a const and initialize it so that the pointer value remains at its initial value and cannot be changed. Copy Code code as follows: Time T1 (10,12,15), T2; Time * Const ptr1=t1; ptr1=t2; The general form of a constant point