pgm没有std库函数 [英] pgm without std library functions

问题描述

是否可以使用C和C ++中的标准库函数编写程序来读取和打印不带

的数字？

如果是......怎么样？

等待回复...

is it possible to write a program to read and print a number without
using standard library functions in C and C++?
if yes ....how?
waiting for a reply...

推荐答案

Letsee ++写道：

Letsee++ wrote:

是否有可能编写一个程序来读取和打印数字而不使用C和C ++中的标准库函数？

is it possible to write a program to read and print a number without
using standard library functions in C and C++?

定义读取和打印。


答案可能是否定的。


为什么你不想使用标准库？它真的非常有用，而且，错误...标准的一部分是有原因的。


Ben Pope

-

我不仅仅是一个数字。对很多人来说，我被称为字符串...

Define "read" and "print".

The answer is probably no.

Why would you not want to use the standard library? It''s really quite
useful, and, err... part of the standard for a reason.

Ben Pope
--
I''m not just a number. To many, I''m known as a string...

Letsee ++写道：

Letsee++ wrote:

hi，
是否有可能编写一个程序来读取和打印数字而不使用C和C ++中的标准库函数？
如果是......怎么做？

is it possible to write a program to read and print a number without
using standard library functions in C and C++?
if yes ....how?

答案是明确的可能。许多平台提供了可用于此的其他非标准的
功能。在某些情况下，您甚至可以直接使用某些特定的hackery直接访问硬件。

The answer is a definite "maybe". Many platforms offer other, non-standard,
functions that could be used for this. On some, you might even be able to
do some specific hackery to access the hardware directly.

" Letsee + + QUOT;写道：

"Letsee++" writes:

是否有可能编写一个程序来读取和打印数字而不使用C和C ++中的标准库函数？
如果是的话...... .how？

is it possible to write a program to read and print a number without
using standard library functions in C and C++?
if yes ....how?

你当然可以在DOS时代的机器上做到这一点。我不记得了所有的话，x86浮现在脑海中。您可以通过

类型的后门与操作系统进行通信。我怀疑如果一个人足够聪明你可能仍然能够做某事。我写了一个例程来打印（在*打印机*上）

仍在Windows 98中使用这些技术我正在考虑 - 我

没用过最近。这避免了印刷负担沉重的GUI方式，所以它实际上有用。您可以同时打印

程序执行是一个Windows程序（控制台

程序）。


还要考虑使用system（）函数可以做什么。

You could certainly do it on machines in the DOS era. I can''t remember all
the buzz words, x86 comes to mind. You could communicate with the OS via a
kind of back door. I suspect if one were clever enough you might still be
able to do something. I wrote a routine to print (on a *printer*) that
still worked with Windows 98 using these techniques I am thinking of -- I
haven''t used it lately. This avoided the heavily burdened GUI way of
printing, so it actually served a purpose. You could do printing
concurrently with program execution is a Windows program (which a "console"
program is).

Consider also what you might do with the system() function.

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