C++ 的 int 和 long 有什么区别?
it1352
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问题说明
如果我错了，请纠正我，
Correct me if I am wrong,
int 是 4 个字节，取值范围从 -2,147,483,648 到 2,147,483,647 (2^31)
long 是 4 个字节，取值范围从 -2,147,483,648 到 2,147,483,647 (2^31)
int is 4 bytes, with a range of values from -2,147,483,648 to 2,147,483,647 (2^31)
long is 4 bytes, with a range of values from -2,147,483,648 to 2,147,483,647 (2^31)
C 有什么不同?它们可以互换使用吗?
What is the difference in C ? Can they be used interchangeably?
正确答案
#1
它依赖于实现.
例如，在 Windows 下它们是相同的，但例如在 Alpha 系统上，long 是 64 位，而 int 是 32 位.这个文章 涵盖了英特尔 C 编译器在可变平台上的规则.总结一下:
For example, under Windows they are the same, but for example on Alpha systems a long was 64 bits whereas an int was 32 bits. This article covers the rules for the Intel C compiler on variable platforms. To summarize:
OS arch size
Windows IA-32 4 bytes
Windows Intel 64 4 bytes
Windows IA-64 4 bytes
Linux IA-32 4 bytes
Linux Intel 64 8 bytes
Linux IA-64 8 bytes
Mac OS X IA-32 4 bytes
Mac OS X Intel 64 8 bytes
这篇好文章是转载于：学新通技术网
