看<C程序设计语言>(英文版)学到的两个用法. 两个很简单的宏用法. #的用法: if, however, a parameter name is preceded by a # in the replacement text, the combination will be expanded into a quoted string with the parameter replaced by the actual argument. #include <stdlib.h> #d…

#include <stdio.h> #include <stdlib.h> /* 英语原文: In function-like macros, a # operator before an identifier in the replacement-list runs the identifier through parameter replacement and encloses the result in quotes, effectively creating a stri…

编编程语言的目的是帮助程序员以代码的形式表述ideas.编程语言一方面为程序员提供一组关于可以做什么的抽象,另一方面为程序员提供可以被机器执行的轮子.C++编程语言,支持4种编程范式:过程式(Procedural Programming,主要集中在过程和合适的数据结构).数据抽象(Data abstraction,主要表现为设计抽象接口隐藏具体实现细节).面向对象编程(Object-oriented programming,主要集中在设计.实现和使用类继承结构,提供运行时多态性)和泛型编程(Ge…

The compilation of a C++ program involves three steps: Preprocessing: the preprocessor takes a C++ source code file and deals with the #includes, #defines and other preprocessor directives. The output of this step is a "pure" C++ file without pr…

http://www.gnu.org/software/m4/m4.html GNU M4 is an implementation of the traditional Unix macro processor. It is mostly SVR4 compatible although it has some extensions (for example, handling more than 9 positional parameters to macros). GNU M4 also…

C++ Core Guidelines September 9, 2015 Editors: Bjarne Stroustrup Herb Sutter This document is a very early draft. It is inkorrekt, incompleat, and pµøoorly formatted. Had it been an open source (code) project, this would have been release 0.6. Copy…

An Assembly Language I.D.E. To Engage Students Of All Levels * A Tutorial *2007 CCSC: Central Plains Conference Pete Sanderson, Otterbein College, PSanderson@otterbein.edu Ken Vollmar, Missouri State University, KenVollmar@missouristate.edu     MARS…

预处理功能是C语言的重要功能. 问:为什么要预处理,什么是预处理? 答:我们知道高级语言的运行过程是通过编译程序(编译器)把源代码翻译成机器语言,实现运行的.编译程序的工作包含:语法分析.词法分析.代码生成.代码优化等.但是在正式编译之前还有一些工作要做,例如:去掉注释.变换格式之类的.C语言允许在源程序中包含预处理命令,正式编译(词法分析)前,先对这些命令进行“预处理”:然后在进行通常的编译处理.预处理命令从语法上讲不是C语言的一部分,但扩展了C语言程序设计的环境,简化程序开发过程:有利于移植…

INF Files for Bears of Little BrainMay 1, 2003Brian Catlin Copyright � 2003 by Brian Catlin. All rights reserved Just the other day, while walking through the hundred acre wood, I was accosted by the local fauna. "Excuse me", asked a small pink…

macro is typeless and execute faster than funtion ,becaus of the overhead of calling and returnning of function,but macro will increase the size of program due  to many time's substitution,as well as the side effect of macro  may cause unexpected res…