Dear Helmut!
Thanks a lot for the answers and help!
Unfortunately, it didn't work out. I'm getting a message:
-------------- Build: Release in Dislin (compiler: GNU GCC Compiler)---------------
g++.exe -Wall -m64 -fexceptions -std=c++20 -O2 -Wall -IN:\MyProgramming\Dislin -c N:\MyProgramming\Dislin\exa_cpp.cpp -o obj\Release\exa_cpp.o
g++.exe -LN:\MyProgramming\Dislin -o bin\Release\Dislin.exe obj\Release\exa_cpp.o -m64 -s N:\MyProgramming\Dislin\discpp.a
N:\MyProgramming\Dislin\exa_cpp.cpp: In function 'void exa_10()':
N:\MyProgramming\Dislin\exa_cpp.cpp:579:10: warning: variable 'nl' set but not used [-Wunused-but-set-variable]
579 | { int i, nl;
| ^~
N:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: N:\MyProgramming\Dislin\discpp.a(qqwini.o):qqw_win.c:(.text+0x255c): undefined reference to `__imp_glRasterPos2i'
N:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: N:\MyProgramming\Dislin\discpp.a(qqwini.o):qqw_win.c:(.text+0x2584): undefined reference to `__imp_glDrawPixels'
............................................... (many other type errors "
undefined reference")