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This chapter is from the book

This chapter is from the book

C++ in One Hour a Day, Sams Teach Yourself, 8th EditionC++ in One Hour a Day, Sams Teach Yourself, 8th Edition

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This chapter is from the book

This chapter is from the book

C++ in One Hour a Day, Sams Teach Yourself, 8th EditionC++ in One Hour a Day, Sams Teach Yourself, 8th Edition

Learn More Buy

Keywords You Cannot Use as Variable or Constant Names

Some words are reserved by C++, and you cannot use them as variable names. These keywords have special meaning to the C++ compiler. Keywords include if, while, for, and main. A list of keywords defined by C++ is presented in Table 3.2 as well as in Appendix B, “C++ Keywords.” Your compiler might have additional reserved words, so you should check its manual for a complete list.

TABLE 3.2 Major C++ Keywords

asm

else

new

this

auto

enum

operator

throw

bool

explicit

private

true

break

export

protected

try

case

extern

public

typedef

catch

false

register

typeid

char

float

reinterpret_cast

typename

class

for

return

union

const

friend

short

unsigned

constexpr

goto

signed

using

continue

if

sizeof

virtual

default

inline

static

void

delete

int

static_cast

volatile

do

long

struct

wchar_t

double

mutable

switch

while

dynamic_cast

namespace

template

 

In addition, the following words are reserved:

and

bitor

not_eq

xor

and_eq

compl

or

xor_eq

bitand

not

or_eq

 

DO

DO give variables descriptive names, even if that makes them long.

DO initialize variables, and use list initialization to avoid narrowing conversion errors.

DO ensure that the name of the variable explains its purpose.

DO put yourself into the shoes of one who hasn’t seen your code yet and think whether the name would make sense to him or her.

DO check whether your team is following certain naming conventions and follow them.

DON’T

DON’T give names that are too short or contain just a character.

DON’T give names that use exotic acronyms known only to you.

DON’T give names that are reserved C++ keywords as these won’t compile.

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Last Update: November 17, 2020