wooden pointer

#include #include int Main1 (){Defines an uninitialized array of shaped pointers in which each element holds a separate pointerint *p[5];The size of P is 20 bytes; 64-bit operating system is 40 bytes, a pointer variable 8 bytesprintf ("%d\n", sizeof (p));P1 represents an integer pointer variable, and the pointer can only point to an array of 10 elements;int (*P1)

A function pointer is a pointer to a function, which refers to the return value of a function as a pointer, but the following questions still feel confusing. Can you tell us more about this point?(1) What is float (**def) [ten] def?(2) double* (*GH) [a] GH is what?(3) Double (*f[10]) () What is F?(4) int* ((*B) [ten]) b What is it? This old feeling a bit messy, w

1. References to pointers#include 2. Pointer to Pointer#include Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced. A reference to a pointer and a pointer to a pointer

Pointer to a constant, pointer constant, pointer constant to a constantThe first character is often called a constant pointer. They correspond to the following situations: const int * PI; or Int const * pi; int * const PI; const int * const PI; except for the letter pi, it is not easy to correctly write the "const", "*

Three nouns, though very raozui, are very accurate. The semantic analysis of Chinese words can easily separate three concept areas. one) constant pointer. A constant is an adjective, and a pointer is a noun, a biased structure phrase centered on the pointer. In this way, the constant pointer is essentially a

# Ifndef _ test_h # DEFINE _ test_h // you can understand the pointer as an address. An address can record a data address, and a pointer is also a // data type, therefore, the pointer can also record the address of a pointer. # Include

Overviewfor beginners, pointers are always a very difficult concept to understand in C language. In this article, we'll explain the difference between constant pointers, pointer constants, const pointer to const (PS: The landlord thinks this can be translated to constant pointers to constants) Constant pointerLet's first understand what a constant pointer is. A

Pointer array/array pointer, pointer Array # Include Output result: This code is well written .....

To modify the value of a variable, you need to use a pointer to the variable type as a reference to the argument or variable. If the variable is a generic type of variable, such as int, you need to use a pointer of type int int * As the argument or the reference type of int int. However, if the variable type is a pointer type, such as char*, you need to use a

This is the best entry-level article I've ever seen on pointers, which allows beginners to master complex pointer manipulations in a very short period of time. Although, now the Java, C # and other languages have been canceled pointers, but as a C + + programmer, Pointer direct operation of memory, in the data operation has a fast speed, save memory and other advantages, is still a lot of C + + Programmer's

# Include # Include Using namespace STD; Class {}; Class B:Public {}; Void F (B B) { Cout } Void F (A ) { Cout } Int _ tmain (INT argc, _ tchar * argv []) { A * P1 = new B; F (* P1); // call f (A ) A; B * P2 = (B *) ; F (* P2); // call f (B B) /* F (* P2) Call analysis: F (B B) is equivalent to F (B * P), F (A A) is equivalent to F (A * P ), F (* P2) is equivalent to F (P2), while P2 is B * type. Of course, F (B * P) is called, that is, F (B B) is called ). The same applies to F (*

1. Summary of data types of pointersAbout the data type of the pointer definition meaning int i; Defining Shaping variables int *p; Defines a pointer variable p that only wants integer data int a[n]; Defines an array of integers a, which has n elements int *p[n]; Defines the pointer