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This chapter is from the book

This chapter is from the book

Sams Teach Yourself C++ in One Hour a Day, 9th EditionSams Teach Yourself C++ in One Hour a Day, 9th Edition

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This chapter is from the book

This chapter is from the book

Sams Teach Yourself C++ in One Hour a Day, 9th EditionSams Teach Yourself C++ in One Hour a Day, 9th 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. 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, typically documented in its manuals.

TABLE 3.2 Major C++ Keywords and Reserved Words

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

Reserved Words

and

bitor

not_eq

xor

and_eq

compl

or

xor_eq

bitand

not

or_eq

DO

DON’T

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

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

DO initialize variables: Use list initialization to avoid narrowing conversion errors.

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

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

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

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Last Update: November 17, 2020