sizeof(some pointer) 是否总是等于四?

Is the sizeof(some pointer) always equal to four?(sizeof(some pointer) 是否总是等于四?)
本文介绍了sizeof(some pointer) 是否总是等于四?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

例如:sizeof(char*) 返回 4.正如 int*long long* 以及我尝试过的所有内容一样.有没有例外?

For example: sizeof(char*) returns 4. As does int*, long long*, everything that I've tried. Are there any exceptions to this?

推荐答案

你得到的保证是 sizeof(char) == 1.没有其他保证,包括不保证 sizeof(int *) == sizeof(double *).

The guarantee you get is that sizeof(char) == 1. There are no other guarantees, including no guarantee that sizeof(int *) == sizeof(double *).

实际上,在 16 位系统上,指针大小为 2(如果你能找到的话),在 32 位系统上为 4,在 64 位系统上为 8,但是依靠在给定的尺寸上.

In practice, pointers will be size 2 on a 16-bit system (if you can find one), 4 on a 32-bit system, and 8 on a 64-bit system, but there's nothing to be gained in relying on a given size.

这篇关于sizeof(some pointer) 是否总是等于四?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持编程学习网!

本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除!

相关文档推荐

C++ find method not working(C++查找方法不起作用)
How to determine the offset of an element of a tuple at compile time?(如何在编译时确定元组元素的偏移量?)
Error: control Reaches end of non void function(错误:控件已到达非无效函数的末尾)
Error: Jump to case label in switch statement(错误:跳转到SWITCH语句中的CASE标签)
Order of elements in set of pointers(指针集中元素的顺序)
error while loading shared libraries: jvm.dll(加载共享库时出错:jvm.dll)