为什么很难编写可移植的C程序？ [英] Why is it difficult to write portable C programs?

问题描述

我想知道，为什么太硬，使许多操作系统，如Windows和Linux上运行的程序，而不包括胶水code。他们都共享相同的体系结构（x86），所以我觉得应该是很简单。此外，C是标准化的，所以为什么实现这些操作系统diferent？为什么难以遵循标准，并推行全民库的所有操作系统？

I want to know, why is it too hard to make a program run in many OSes, like Windows and Linux, without including glue code. They all share the same architecture (x86), so I think it should be simple. Furthermore, C is standardized, so why are implementations diferent in these OSes? Why is it hard to follow the standard and implement a universal library for all OSes?

我用C编程了将近两年，目前我用巧舌如簧的可移植性。

I have programmed in C for almost two years, and currently I use glib for portability.

我不是在寻找一个解决这个问题，我已经使用油嘴滑舌用于这一目的。但我想知道为什么是必要的，它为什么难治使C库没有差别。

I'm not looking for a solution to this problem, I'm already using glib for this purpose. But I want to know why it is necessary, why it's dificult to make a C library without differences.

[ADD]

例如，当我写在C /油嘴一个程序，我用的是gchar / gint等类型确实的C基本类型，在大约巧舌如簧维基百科，它说：

For example, when i write a program in C/Glib, i use the gchar/gint and so on types indeed the C primitive types, in wikipedia about glib, it says that :

功能

在初级水平提供GLib的类型定义替换C基本类型字符，整型，浮点，等等，以提高便携性

On an elementary level GLib provides type definitions replacing the C primitive types char, int, float, and so on in order to improve portability"

为什么ç基本类型是不可移植，整个语言？

Why C primitive types is not portable and the whole language?

感谢所有的答案。

推荐答案

制作了一个计算的一点，打印结果的工作你的基本的C程序很容易。

Making your basic C program that computes a little and prints results work is easy.

问题在于，做任何实质性任何C程序将依赖于从操作系统很多服务，并在许多方面有所不同。文件I / O往往是相似的，但是当涉及到​​图形，它们之间的区别很多。这就是问题的症结所在。

The problem is that any C program that does anything substantial is going to rely on a lot of services from the operating system, and those differ in many ways. File I/O tends to be similar, but when it comes to graphics, they differ a lot. And that is the crux of the problem.

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