e******r
发帖数: 220 | 1 int64 VS int32. 什么语言什么环境下要格外注意呢?
谢谢 | h*******e
发帖数: 225 | 2 Your question is not well defined.
【在 e******r 的大作中提到】
: int64 VS int32. 什么语言什么环境下要格外注意呢?
: 谢谢
| l*****d
发帖数: 359 | 3 first, you should know a 64-bit int has much larger range available than than 32-
bit int, right?
This kind of usage for portability. for example in a machine when 'int' is
4bytes and 'long' is 8bytes:
typedef int Int32
typedef long Int64
use Int32 and Int64 in your program.
When porting your program to a difference machine when 'int' is 8bytes, but
'short' is 4 bytes, you can just change the type define:
typedef short Int32
typedef int Int64
and you don't need to change anything in your program
【在 e******r 的大作中提到】
: int64 VS int32. 什么语言什么环境下要格外注意呢?
: 谢谢
| c*****t
发帖数: 1879 | 4 There are a lot more issues. Things such as alignment, casting,
overflow, bit operation, dealing with I/O etc.
than 32-
but
【在 l*****d 的大作中提到】
: first, you should know a 64-bit int has much larger range available than than 32-
: bit int, right?
: This kind of usage for portability. for example in a machine when 'int' is
: 4bytes and 'long' is 8bytes:
: typedef int Int32
: typedef long Int64
: use Int32 and Int64 in your program.
: When porting your program to a difference machine when 'int' is 8bytes, but
: 'short' is 4 bytes, you can just change the type define:
: typedef short Int32
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