China DOS Union

Hello everyone!
I downloaded DJGPP C/C++ 2.03. I heard it can be used without installation. But no matter what I do, I just can't find its main program. What is it called, and how do I run it under DOS?
I hope all the experts here can give me some advice, thanks!

Set up the environment variables
set include=path (the path to the include folder)
set lib=path (the path to the lib folder)
Set the path for the main directory's (bin)
Compile command gcc (C)
gcc test.c or gcc -o test.exe test.c
gcc has a lot of parameters, take a look yourself

Sorry, my English is very poor!
In which file do you set what you called "set up the environment variables"? Could you explain it in a bit more detail? Also, I still don't know which one is its main program. Can you tell me? It's my first time using it!

It's not set in some file, but by using the SET command to set system environment variables.
DJGPP's most important environment variable is the setting of %DJGPP%, for example:
SET DJGPP=C:\DJGPP\DJGPP.ENV

Right, I forgot about that, hehe

What should I do if the environment variables are set wrong?
Also, how do I run DJGPP C/C++ 2.03?

I already set the environment variables in MS-DOS mode under Windows, but why still can't I run it!
I hope everyone can help me, thanks!

You should run the executable files such as GCC.EXE in the BIN folder of DJGPP, for example GCC FILE.C

That's exactly what I did, but it still doesn't work! After running it, the screen shows the following message:
gxx: Cannot execute 'gcc.exe'; No such file or directory (ENOENT)
My settings are like this: in the Autoexec.bat batch file in the root directory of drive C, I entered the following:
set bin=c:\DJGPPv23\bin
set include=c:\DJGPPv23\include
set lib=c:\DJGPPv23\lib
set djgpp=c:\DJGPPv23\djgpp.env

Are the above settings correct?
Also, I found that there is no file called gcc in the bin folder, only one called gxx! What's going on?
I hope everyone can help me out, thanks!

Running the GXX command won't work; you should run the GCC command. Remember that DJGPP is a command-line C compiler, and generally only advanced users use it this way.

But there is only gxx.exe in the bin folder, there is no gcc.exe at all! If I type the command gcc, the system says it can't find this file!
Sigh, what should I do?

You also need to download the file GCCxxx.ZIP (where xxx is the version number). It's very complicated, and I don't recommend beginners use it. Just use an ordinary compiler instead.

Where can I download DJGPP?

Where can I download the GCCxxx.ZIP file?
Although I'm a newbie, I still want to use DJGPP C/C++ software! I really want an article with detailed DJGPP C/C++ setup instructions! If moderator Wengier has time, could you write one?
I look forward to that day coming, thanks!