为什么我们使用图书馆？（抱歉，我是新北京） [英] Why do we use libraries?(Sorry but i am a newBei)
问题描述
大家好，
我想知道为什么我们使用库（静态或共享）。
我们可以通过包含头文件来完成这项工作我也希望
知道究竟是什么链接和加载。
i知道这些都是非常简单和基本的问题。
但是plz帮助我考虑到我是一名新开发者的事实
用C ++。
提前感谢你。
Just Saurabh
Hi all,
I want to know why do we use libraries(static or shared).
We can perform that work by including header files too.I also wish to
know what exactly is linking and loading.
i know these are pretty easy and basic questions.
But plz help me considering the fact that i am a new developer
in C++.
Thanking you in advance.
Just Saurabh
推荐答案
>>我想知道为什么我们使用库（静态或共享）。
你试过谷歌吗？ ？
>>I want to know why do we use libraries(static or shared).
Did you try google?
我们也可以通过包含头文件来执行该工作。
We can perform that work by including header files too.
头文件只包含声明（或至少被认为是b $ b），但不是定义。静态/动态库，contian
定义即函数的实现。
HTH，
Divick
Header files contains only the declarations(or at least are supposed
to), but not definitions. Static / dynamic libraries, contian the
definitions i.e the implementation of functions.
HTH,
Divick
Divick写道：
Divick wrote:
我想知道为什么我们使用库（静态或共享）。您是否尝试过谷歌？我们也可以通过包含头文件来执行该工作。
I want to know why do we use libraries(static or shared). Did you try google?We can perform that work by including header files too.
头文件只包含声明（或者至少包含
），但不包含定义。静态/动态库，contian
定义即函数的实现。
HTH，
Divick
Header files contains only the declarations(or at least are supposed
to), but not definitions. Static / dynamic libraries, contian the
definitions i.e the implementation of functions.
HTH,
Divick
谢谢很多迪维克。
雅我试过google.But无法得到我想要的东西。头文件只包含声明（或者至少应该包含声明），但不包含定义。静态/动态库，contian
定义，即函数的实现。
Thanks a lot Divick.
Ya i tried google.But couldnt get what i was looking for. Header files contains only the declarations(or at least are supposed
to), but not definitions. Static / dynamic libraries, contian the
definitions i.e the implementation of functions.
但我们也可以在头文件中定义函数。
文件喜欢< stdio.h>，< iostream.h>包含声明
以及定义。
那么我们为什么还要创建库？
我的意思是创建它们会带来什么好处。
Just Saurabh
But we can define functions in header files too.
Files like <stdio.h>, <iostream.h> contains declarations
as well as definitions.
So why do we bother to create libraries?
I mean what benefit we get by creating them.
Just Saurabh
" Saurabh" < NI ****** @ gmail.com>写道：
"Saurabh" <ni******@gmail.com> writes:
我想知道为什么我们使用库（静态或共享）。
一个答案是：因为使用库可以使程序员的生活更方便。一个库
包含并提供一些可以使用的功能，而不用考虑它的实现。
以例如C ++中输出的功能。
如果你想在输出中写42，你只需要b / b
包含头文件''iostream''并使用合适的
从库中构造。例如
[[[
#include< iostream>
int main（）{
std :: cout<< 42<< std :: endl;
返回0;
}
]]]
Isn'那很酷吗？想象一下，你应该自己编写
输出功能。您可以将
库视为节省时间。 （好吧，他们可能带来新的
库链接特定问题。;-)
BTW通常没有必要指定
各自的库包含构建过程中std-namespace的功能
我们也可以通过包含头文件来执行该工作。也希望知道究竟是什么链接和加载。
链接是将库和其他
代码组合在一起的过程。链接是实现一个
程序实际上使用库的功能。
我知道这些是非常简单和基本的问题。
你怎么知道的？ ;-)你是否已经知道答案
这是一个测试 - 如果是其他人知道的问题？
但是PLZ帮助我考虑我是C ++新开发者的事实。
I want to know why do we use libraries(static or shared).
One answer is: because the use of libraries can make
programmers life much more convenient. A library
contains and provides some functionality that can be
used without thinking much about its implementation.
Take for example the functionality of output in C++.
If you want to write 42 to the output you simply
include the header-file ''iostream'' and use a suitable
construct from the library. E.g.
[[[
#include <iostream>
int main() {
std::cout << 42 << std::endl;
return 0;
}
]]]
Isn''t that cool? Imagine you should have written that
output-functionality on your own. You could regard
libraries as time-savers. (Ok, they may bring new
library-linking-specific problems. ;-) )
BTW typically there is no need to specify the
respective library that contains the functionality of
the std-namespace in the build-process.
We can perform that work by including header files too.I also wish to
know what exactly is linking and loading.
Linking is the process of bringing a library and other
code together. Linking is the realization that a
program actually uses the functionality of a library.
i know these are pretty easy and basic questions.
How do you know? ;-) Do you already know the answers
and this is kind of a test-if-the-others-know-too-question?
But plz help me considering the fact that i am a new developer
in C++.
睁大眼睛！ ; o）
HTH
Keep your eyes open! ;o)
HTH
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