- What Is a Variable?
- Common Compiler-Supported C++ Variable Types
- Determining the Size of a Variable by Using sizeof()
- Automatic Type Inference Using auto
- Using typedef to Substitute a Variable’s Type
- What Is a Constant?
- Keywords You Cannot Use as Variable or Constant Names
- Summary
- Q&A
- Workshop
This chapter is from the book
This chapter is from the book
This chapter is from the book
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. |