一、注释符号
C语言中的符号：
奖项：Best of show
功能：处理三种文件格式(PGM、PPM和ASCII Art)的采样工具
作者：Google华裔工程师Don Hsi-Yun Yang
注释符号，下面哪些注释是正确的。
#include <stdio.h>int main(){ int/*...*/i; // 注释由空格来代替，所以是正确的 char* s = "abcdefgh //hijklmn"; // 在双引号中的注释会当成字符，所以也不会报错，但与程序愿意不符 //Is it a \ valid comment? // ‘\’接续符，整个语句就是一个注释 in/*...*/t i; //会报错 return 0;}
gcc编译后出错结果：
[root@localhost 1]# gcc 1-1.c 1-1.c: In function ‘main’:1-1.c:11: error: ‘in’ undeclared (first use in this function)1-1.c:11: error: (Each undeclared identifier is reported only once1-1.c:11: error: for each function it appears in.)1-1.c:11: error: expected ‘;’ before ‘t’
注释规则小结：
1、编译器会在编译过程删除注释，但不是简单的删除而是用空格代替
2、编译器认为双引号括起来内容都是字符串，双斜杠也不例外
3、"/*........*/"型注释不能被嵌套
4、你觉得y = x/*p是什么意思？
作者本意：把x除以*p的结果赋值给y
编译器：将/*作为一段注释的开始，把/*后的内容都当成注释内容，直到*/出现为止
在编译器看来，注释和其它程序元素都是平等的，所以，作为程序员也不能看轻注释。
5、出色注释怎么来写
注释应该准确易懂，防止二义性，错误的注释有害而无利
注释是对代码的提示，避免臃肿和喧宾夺主
一目了然的代码避免加注释
不要用缩写来注释代码，这样可能会产生误解
注释用于阐述原因而不是用于描述程序的运行过程
下面是一个漂亮程序的截取部分：
/*
========================================================================
FILE: Form.c
SERVICES:
GENERAL DESCRIPTION: Concrete implementation of RootForm and base IForm
methods
========================================================================
========================================================================
Copyright ?1999-2005 QUALCOMM Incorporated
All Rights Reserved.
QUALCOMM Proprietary/GTDR
========================================================================
========================================================================
*/
/*==================================================================================
XXXXXXX Confidential Proprietary
(c) Copyright XXXXXXX - All Rights Reserved
Revision History:
Modification
Author Date CR Number Major Changes
---------------------- ------------ ------------ ----------------------------
Daniel Rossler 01/18/2007 LIBkk94550 Add check for NULL pointers
in order to avoid a panic
==================================================================================*/
// If there are still forms on the stack, then we need to set up several things: // 1. The topmost form is the active form // 2. All other forms are not active // 3. The topmost form is being listened to via mlFormActive // 4. The topmost non-popup form is being listened to via mlFormTopmostNonPopup // 5. The topmost non-popup form and all popup forms on top of it are shown // 6. Forms below the topmost non-popup form are now shown