long 和 int 数据类型的区别

问题描述

考虑到以下语句返回4，C++中的int和long类型有什么区别?

Considering that the following statements return 4, what is the difference between the int and long types in C++?

sizeof(int)
sizeof(long)

推荐答案

来自 this 参考:

一个 int 最初的目的是的自然"字大小处理器.许多现代处理器可以以相等的方式处理不同的字长轻松.

An int was originally intended to be the "natural" word size of the processor. Many modern processors can handle different word sizes with equal ease.

还有这一点:

在许多(但不是全部)C 和 C++ 上实现，一个长大于一个整数.当今最流行的桌面平台，如 Windows 和 Linux，主要在 32 位处理器上运行，并且这些平台的大多数编译器使用具有相同大小的 32 位 int并表示为 long.

On many (but not all) C and C++ implementations, a long is larger than an int. Today's most popular desktop platforms, such as Windows and Linux, run primarily on 32 bit processors and most compilers for these platforms use a 32 bit int which has the same size and representation as a long.

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