Hello ,about program.

[student111]

Hello,

I have some questions about programming in C++,

I am new to programming and making a program about prime numbers, and need your help.

Q.1Does standard library file already exists in Dev C++ program?

Q.2 If we make a link list data structure, do we have to make a node.cpp file? Is this node.cpp file already their in the library of the Dev C++?

thanks,

[manasij7479]

1. Yes, if you have installed it correctly. The standard library is header only though (afaik).
2. If YOU make a library, how can it be in the library already ?
Make your node.cpp and node.h.
Make sure to have node.cpp included (in the project?) when compiling your main file.

[King Mir]

If you're using Dev C++ you should update the compiler that it uses. The one it comes with is pretty ancient.

[student111]

Ok thanks for the reply,

So it means that node.cpp file is not included in the C++ library ,do I have to make it ?

Is it an implementation file?

[laserlight]

So it means that node.cpp file is not included in the C++ library ,do I have to make it ?

Is it an implementation file?

Obviously: as manasij7479 guessed, node.cpp is presumably your own source file, so it is not included in the standard library.

If you do want to use standard library facilities for linked lists, then #include <list> and use std::list.

[student111]

laser light,

Thanks for your reply,

So if we use standard library eg. <list> for linked lists, and use std:list, is this an implementation file or the interface file?

Thanks

[laserlight]

So if we use standard library eg. <list> for linked lists, and use std:list, is this an implementation file or the interface file?

<list> is a standard header. Typically, a standard header is actually a header file, though this is not required. A standard header certainly allows you to use the interface of the associated standard library component(s), but it may or may not contain implementation.

Anyway, the C++ standard does not mandate any particular implementation, so you do not need to be concerned with the implementation of the standard library if you just want to use a library component.

[student111]

thanks for the reply,

so if we just use the interface methods of link list, or any other data structure in C++ program, then we don't need to include any .cpp file?

[laserlight]

so if we just use the interface methods of link list, or any other data structure in C++ program, then we don't need to include any .cpp file?

If you mean "include" as in a #include, then yes. In fact, it is very rare to include a source file in any C++ program: you might only do so if the source file is not meant to be compiled on its own, but rather is included in a header as a special approach to implementing function templates (but then it would not be recommended to use .cpp as the file extension as it can be confusing). At the moment, you probably don't need to worry about this, so just take it that any time you include a source file, you're doing it wrong.