Example taken from the following address : https://www.a1k0n.net/2006/09/15/obfuscated-c-donut.html

Rotating donut ascii art

compile with gcc -o donut donut.c -lm

It needs ANSI- or VT100-like terminal emulation (Linux,BSD,Mac,cygwin,minGW)

// start c code k;double sin() ,cos();main(){float A= 0,B=0,i,j,z[1760];char b[ 1760];printf("\x1b[2J");for(;; ){memset(b,32,1760);memset(z,0,7040) ;for(j=0;6.28>j;j+=0.07)for(i=0;6.28

i;i+=0.02){float c=sin(i),d=cos(j),e= sin(A),f=sin(j),g=cos(A),h=d+2,D=1/(c* he+fg+5),l=cos (i),m=cos(B),n=s
in(B),t=chg-f* e;int x=40+30D (lhm-tn),y= 12+15D*(lhn +tm),o=x+80y, N=8*((fe-cdg )m-cde-fg-l dn);if(22>y&& y>0&&x>0&&80>x&&D>z[o]){z[o]=D;;;b[o]= ".,-~:;=!#$@"[N>0?N:0];}}/#!!-/ printf("\x1b[H");for(k=0;1761>k;k++) putchar(k%80?b[k]:10);A+=0.04;B+= 0.02;}}/*****####!!=;:~ ~::==!!!****!!!==::- .,~~;;;========;;;:~-. ..,--------,/

//end