DONUT in c++

Notes :

I used: i686-w64-mingw32-gcc donut.c -lm to make an .exe output.
any idears?

Edit:
I tried: i686-w64-mingw32-gcc donut.c && ./a.exe and th donut spins, but verry slow and i can now output an .exe

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Edit 2: When I start te standalone exe it just prints a lot of donuts. Bute when it is started in a termenial (cmd/powershell) it spinns slow

Download the file and add missing header files to code

#include <stdio.h>
#include <string.h>

then just compile and run

$ gcc donut.c && ./a.out

it looks best with white text and black background

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İnclude those lines top of the code and compile your code with -lm
#include <stdio.h>
#include <string.h>
#include <math.h>