Pointers and Constants char * const q = "abc"; // q is const *q = 'c'; // OK q++; //ERROR const char *p = "ABCD"; // (*p) is a const char *p = 'b'; // ERROR! (*p) is the const 在 C++ 是下面这样的. int i; const int ci = 3; int * ip; ip = &…

<?php function test() { echo "abc"; } test(); ?> 结论: 一 编译 a.对 函数声明进行词法分析和语法分析:在语法分析中的函数zend_do_begin_function_declaration 作用是: 初始化zend_op_array,填充 function_name ,line_start ,设定相应opcode:ZEND_DECLARE_FUNCTION, 以key为function_name, value为 zend…

[转]作者:xwdreamer   出处:http://www.cnblogs.com/xwdreamer 对于指针和常量,有以下三种形式都是正确的: const char * myPtr = &char_A;//指向常量的指针 char * const myPtr = &char_A;//常量的指针 const char * const myPtr = &char_A;//指向常量的常量指针 下面依次对这三种类型进行介绍. 因为*操作符是左操作符,左操作符的优先级是从右到左,对于…

Types and Declarations Boolean Type bool type – boolean , logic type bool literal – true, falseint and bool Nonzero->true Zero ->false true ->1 false->0 1 <= sizeof( bool) <= sizeof(long) void f(int a,int b) { bool b1{a==b}; bool b2 = a=…

The first motivation for const seems to have been to eliminate the use of preprocessor #define for value substitution. It has since been put to use for pointers, function arguments, return types, class objects and member functions. (Page 334) 1 Value…

题目链接:Populating Next Right Pointers in Each Node II | LeetCode OJ Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only u…

题目链接:Populating Next Right Pointers in Each Node | LeetCode OJ Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next ri…

some OpenGL constants This is from (https://github.com/peterderivaz/pyopengles/blob/master/gl2.py) GL_DEPTH_BUFFER_BIT = 0x00000100 GL_STENCIL_BUFFER_BIT = 0x00000400 GL_COLOR_BUFFER_BIT = 0x00004000 GL_POINTS = 0x0000 GL_LINES = 0x0001 GL_LINE_LOOP…

Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example,Given the following binary tr…

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be set to NULL. Initially, al…