Question about data types in C++

[Lucifre]

Often in my C++ book i see variables initialized as

long lg = 0x654321;

or

long DELAY = 10000L;

my question is what do those letter characters do in there? do they change value or what do they do?

 

[vsgiri]

I'm sure u know 0x stands for hexadecimal.
I've never seen 'L' at the end, though!

Giri

 

[saeid5977]

hi
L postfix shows the number is in long type. but in this case (long lg=1000L) it is not necessary to write it. in some case its better to write L at the end of ur number
(it's a way of type casting)

anx 0X prefix shows the number is in HEX format
0x1 --> 1
.
.
.
0xa -->10
.
.
.
0xff -->255

and so on.

 

[polus]

Following on from above; the L postfix forces the compiler to acknoledge the constant as long.

 

[carlosebt]

ok

 

[Lucifre]

Ok i get it now, but... can that be done with postfix for other data types such as integers shorts etc?

 

[saeid5977]

hi
no postfix. for constants but u can use from type casting for variables:

x=(short)y;

and
others...