I am using C++ to do a homework assignment. I am using templates for my class, so I need all implementations of template methods to be in .ipp, not .cpp file (I can't write implementation in .h file as it is the assignment submission requirement)
Eclipse does not seem to support .ipp files without additional settings. There is not much information about .ipp files on the internet, I could not find anything helpful.
I defined a new file type in Eclipse preferences to be able to create an .ipp file. Now that I am trying to write my methods definitions in .ipp file, it keeps complaining that "member declaration is not found" even though I write #include *.ipp" at the end of my header file.
What could the problem?
You have to register .ipp as C++ source file extension:
In Window > Preferences: C/C++ > File Types click New...
Enter the pattern *.ipp and as type select C++ Source File
Click OK
Click Apply and Close
Related
Usually when you create a class in CodeBlocks you have a source file and a header file.
Well, it used to work, but now whenever I create a new class, it doesn't have ".h" or ".ccp" in it. The text is plain and there's no syntax highlighting on it. Here's the image:
Can we remove .h extensions while we define our own header file in c++? like in case of standard header files in c++.
I have created a header file and named it add.h and tried including it using #include "add" but it didn't work.
after following up the comments and answers:
using codeblocks ide
i have created a "add" of type File and tried it including in my source file and it worked. attaching the snapshot below.
the aim of my question is to ask if userdefined header files can also omit .h extensions and how?
i am really trying to explore this fact and don't have a good understanding of how compilers stores standard header files.
A easy to understood conclusion is really appreciated
Thankyou.
Can we remove .h extensions while we define our own header file in c++?
Sure, as long as that matches the filename of the file. As far as the language is concerned, the name of the file is largely irrelevant.
However, .h or similar such as .hpp is conventional, and helps the reader of the source to understand what the file is used for. This is an important consideration.
Another consideration is that some tools use the filename as a heuristic to determine the purpose of the file. For example, your IDE might not assume that the file contains C++ code, and thus not enable C++ features such as source analysis unless you follow a common naming convention.
I have created a header file and named it add.h and tried it including in source file using #include "add" but it didn't work.i know i am missing some important concepts here.
What you're missing is that the include directive must match the name of the file. If you include "add", then you must name the file add, not add.h. If you name a file add.h, then you must include "add.h", not "add".
Can we remove .h extensions while we define our own header file in c++? like in case of standard header files in c++.
You've misunderstood how the files in the stardard library are named. The header file iostream is actually named iostream and not iostream.hpp or iostream.h (unless you use a very old compiler).
I have created a header file and named it add.h and tried including it using #include "add" but it didn't work.
The reason that doesn't work is because the pre-compiler tries to read the file add and you've named the file add.h.
I'm very new in Arduino, so maybe my question will be stupid but I have to ask it!
I made a mqtt client for my nodeMcu chip, and I have this error
/Users/mikevorisis/Downloads/pubsubclient-master/examples/mqtt_esp8266/mqtt_esp8266.ino:27:26:
fatal error: PubSubClient.h: No such file or directory #include
I downloaded the original project from github and I tried to compile the example it has in examples/mqtt_esp8266 but again I have the same problem.
I also tried to put the PubSubClient.h in the same folder but again I have the same problem.
Any ideas?
Thanks in advance.
The file you have downloaded and included in your project is probably not actually a header file. You probably copied the contents of it from github and pasted it into a text document which you saved as a text file with the extension ".h".
It now has the extension "filename.h.txt". The name and extension need to be only "filename.h". Use save as, and select "all files" when saving, and name it "filename.h". Be sure to retype the filename, or it can be auto-filled with the already existing "filename.h.txt" (even if you don's see it!).
If the file now has the right extension, put it in the same folder as your source code file. You can see which directory your source file is in by going to "save as" in your IDE.
A problem you might run into after this is missing definitions. You see, when you use libraries in the form of header files, each header file must usually (in this case, yes) be accompanied by a .cpp file (not necessarily with the same name). The reason for this is that the header file contains declarations, and the cpp file the definitions for said declarations. In other words, the header file is an overview of the facilities available in the library, and the cpp file actually implements the guts of it.
Edit: The example you are trying to run also has #include <ESP8266WiFi.h>, a file that is not available in the github repository that you referred to. I assume that this is a library for a WiFi module or such that you can get elsewhere (manufacturer, other git's or maybe it comes with the Arduino IDE?). In other words, you also need to add its header and (probably) .cpp file to your source directory.
I am trying to learn to develop C++ code with eclipse. I have create a class in a cpp file. Do I need to create an include file by hand (just copy and paste the header definitions), or is there some fancy eclipse button which can create the header file automatically for me?
As far as I know there is no way to generate a header-file out of the cpp. Instead, by using the other direction, it should be possible to generate a method-stub from the function definition within the header (by selecting function-prototype, MenuBar: "Source" > "Implement Method").
Maybe there are some plugins available that do what you want.
Eclipse CDT allows you to write a prototype in the header file, and automatically add it to the C++ file.
Steps to follow
1.Add function prototype to .h file void funct()
2.Select the function name "funct" (try double clicking)
3.In the toolbar click Source -> Implement Method
4.Wizard it up
Situation: I have a big project where I have to implement certain "code units" that all rely on header files with the same name but sometimes different versions of the standard, this header file represents. So header files like "fmiFunctions.h" and "fmiFunctionTypes.h" exist multiple times in my project tree.
Problem: Compilation works fine, since the make file links the correct header file to each source file. But the CDT indexer does not know, which header file it has to take for type definitions, so I get the error "Symbol 'xxx' could not be resolved". When I hit F3, I can choose between the different header files.
Is there any way to tell the indexer, which header file to take for a specific source file or source folder?