C++程序编写规范

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文件
  头文件有".h"后缀。头文件包含类(class),结构(struct),和联合(union)的声明,枚举(enum)的声明,#define,typedef。

  实现文件有一个".cc" (UNIX) 或者".cpp" (Windows, DOS)后缀。实现文件包括函数和方法的实现。

  在头文件和源代码文件中安排一个页眉。页眉可以包含标题,作者,日期,和一些工程的信息,比如这个文件是配合整个工程的。

  一些名字

  通用C++字符的名字:

  (注:这些都是符号的英文原名,目前并没有完全标准化的汉语词汇对应,所以后面的翻译只是个人建议)

   { open brace, open curly左花括号
} close brace, close curly 右花括号
( open parenthesis, open paren 左圆括号
) close parenthesis, close paren 右圆括号
[ open bracket 左方括号
] close bracket 右方括号
. period, dot 句号,点
! exclamation point, bang, not 叹号,否
| bar, vertical-bar, or, or-bar (actually a "vertical virgule") 竖线,按位或
& ampersand, and, reference, ref 和,按位与,引用,取地址
* asterisk, multiply, star, pointer 星号,乘号,星,指针
/ slash, divide 斜线,除号
// slash-slash, comment 双斜线,注释符
# pound 井号 (宏:#,参考 把符号转化为字符串的宏技巧)
 backslash, (sometimes "escape") 反斜线,(有时候做转义符)(还有一个:续行符)
~ tilde 按位取反


  基本类型 "char" 通常发音是"charcoal."的首音节。有时念作 "care" 或者 "car."

名字和排版

  命名约定的名字

  interspersed_underscores 中间下划线

    lowercaseMixedCapital 小写混合(首字母)大写;

    CapitalMixedCapital (首字母)大写混合(首字母)大写;

    ALL_UPPERCASE 全部大写

 

 

    命名约定的应用
 
  enumeration_item_name 枚举,小写加下划线;

    variableName 变量,小写前缀加首字母大写后缀;

    TypeName, ClassName, MethodName() 类型名,类名,方法名,首字母大写前后缀;

    UnixFileName.cc Unix/Linux文件名:每个单词首字母大写;

    dosfn.cpp windows/dos文件名:全部小写;

    POUND_DEFINES 宏定义,全部大写;

    自成档代码(也就是没有文档,仅靠注释和代码说明的源代码文件)
 
  程序中为每个名字使用完整拼写。
 
  避免直接使用数字(Magic number)
 
  不允许出现除了0(有时也包括1)之外的数字常量。 使用常变量或者宏定义(#defines)。
 
  空白
 
  空格(按空格键得到) ;

    新行(按回车键得到) ;

    制表符(tab) (用8个空格代替) ;

    空白和排版
 
  左花括号之后,每行缩进4个空格直到对应的右花括号出现。;

    如果if, while, 或 for 后面没有跟花括号,下一行缩进两个空格;

    冒号结尾的语句,反向缩进两个空格(public, case);

    保留字(if, else, class, struct)前后要加1个空格除非已经因为新行或者特殊标点做了缩进;

    运算符和比较符前后要有一个空格 (除了!之外);

    指针变量 (&,*) 声明的时候要前后加一个空格;

    指针变量 (&,*) 在表达式中,前面(不是后面)要加一个空格llowed) ;左圆括号后要加一个空格;换行
 
  在下面这些关键字后的左花括号后要换行: class, struct, union, enum, method, function (而不是: if, else, do, for, while, switch —— 这些的花括号后只要1个空格。)
 
  方法(method),函数( function), if, else, do, for, while, switch的右花括号后要换行;class, struct, union的右花括号后要换行并插入新空行。。(原文有写Semi-colon,不理解含义);左花括号后要换行。
 
  注释
 
  注释总是从当前缩进开始 "//" 然后紧接一个空格;

    注释中不允许其他注释;

    注释要加在注释的对象之后;

    注释中使用完整语句;

    用于声明的时候,注释可以使用祈使句;

    上面这些,是你的代码看起来舒服的指南,也是你的代码更具可读性的指南。

 

 

 

头文件示例:
 

 // MODULE NAME: ClassName.h
//   PROJECT: CS1344-1,2 Course Notes
//    AUTHOR: Neill Kipp
//     DATE: January 1, 1996
// DESCRIPTION: This file presents examples of naming and
// indentation style in a C++ class declaration. This title
// information is minimal.
// The following prevents files from being included
// twice. It is a naming exception designed to emulate a file name
// (period is not a name character; underscore is).
#ifndef ClassName_h
#define ClassName_h
// This directive includes the superclass declaration.
#include "super.h"
// This directive includes another class declaration.
#include "other.h"
// The comment for an enumeration declaration precedes the declaration.
enum OverflowState
{
  // Each item''s comment precedes it at the same indentation as the item.
  no_overflow,
  
  // Follow the last item with a comma;
  // it helps avoid syntax errors when adding or rearranging items.
  overflow_occurred,
};

 

 

 // This class shows how naming conventions and comments are used in a
// simple class declaration. Whitespace precedes and follows reserved
// words (like "public").
class ClassName
{
  // After a brace, indent four spaces.
  // The description of the variable "memberData" goes here.
  int memberData;
  // If a line ends in single colon, reverse-indent two spaces.
 public:
  // The constructor gives initial values to member data.
  ClassName();
  // The destructor guarantees clean deallocation.
  // The tilde (~) is part of the method name. It is not an operator.
  ~ClassName();
  // This method increments the member variable by the value in "howMuch"
  // and returns TRUE if overflow is detected (FALSE otherwise). Method
  // comments tell what the method does, what the arguments are,
  // and what the method returns.
  OverflowState IncrementMemberVariable( int howMuch);
  
  // Prints message about overflow.
  void ShowOverflow( OverflowState overflow);
};
#endif

 

 

 

 


  源代码文件示例:
 


 // MODULE NAME: ClassName.cc
//   PROJECT: CS1344-1,2 Course Notes
//    AUTHOR: Neill Kipp
//     DATE: January 1, 1996
// DESCRIPTION: This file presents examples of naming and
// indentation style in a C++ class implementation. This title
// information is minimal.
// This directive includes header information for the "ClassName" class.
#include "ClassName.h"
ClassName::ClassName()
{
  // Initialize member data (statement comments are in the imperative,
  // and preceed the statement). Suggestion: write the comments first, then
  // write the code.
  memberData = 0;
}
// The return type appears on the first line,
// followed by the class name colon-colon on the second,
// and finally the method name on the last. Then a newline, an open brace
// and then indent. Notice the space after the open parenthesis. It helps
// the eye catch the type name.
OverflowState
ClassName::IncrementMemberVariable( int howMuch)
{
  // Check the overflow condition.
  if ( TOO_BIG - memberVariable > howMuch) {
// If overflow, return that overflow occurred.
return overflow_occurred;
  } else {
// Otherwise, return overflow is ok.
return overflow_none;
  }
}
// This code implements the ShowOverflow method.
void
ClassName::ShowOverflow( OverflowState overflow)
{
  // Switch is a reserved word. It is followed by a space.
  switch ( overflow) {
// Lines ending in a colon reverse indent two spaces.
   case no_overflow:
// Display message about no overflow.
cout << "No overflow occurred.
";
break;
   case overflow_occurred:
// Display message that overflow occurred.
cout << "Warning: overflow occurred.
";
break;
  }
}

 

  其他例子:
 


 // Note the spacing and indentation in the for statement.
for ( whichItem = 0; whichItem < BIG_NUMBER; whichItem++) {
  DoSomething( whichItem);
}
// Bang is not followed by a space.
while ( !SemaphoreOK()) {
  DoWaitForSemaphore( LONG_TIME);
}

 

 

 

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