Just thought I'd borrow something from IOCCC to show you people what a difficult C program really looks like. These piddly examples to draw stars in triangles or whatever are nothing compared to these:
Code:
#include<stdio.h> /******** SpigotQuine -- usage: ./spigot [pi or e] ********/
char*s="G1%%xJ{;Q7wunmuGuu%%uu#include<stdio.h>/*Spigot_Quine*/#include<stdli"
"b.h>/*_IOCCC2012_*/int*e,"    "i,j,k,n"     ";char*q"    ",*a,*d,*z,*p=%s%c;"
"int" "%cmain(){a=calloc("                                 "1,1e4+n*2);;for(*"
"a=\0@3,z=d=a+n+1,j=n*8-7;"    "k=0,j-1"     ";j-=2){"    "for(a[1]+=2;--z-a;"
"*z=k%%10,k/=10)k+=j/2**z;;for(;k=k%%j*"     "10+*++z,z<d;)*z=k/" "j;;\0@2,z="
"d=a+n*2,*z=1,j=0;++j<n;){for(;k=k%%"           "j*10+*z,a-z;*z"   "--=k/j)a+"
"+;for(k=0;z-d;*a--=k%%10,k/=10)k+"               "=*++z+*a\0"     "@;}d+=spr"
"intf(q=d-20,p,p,34,32,n+1)+2;;;;"                 "for(n=n*2"     "0-400;k<n"
";++k%%n?j=!puts("                                                 "d):(d[j]="
"47,d++,d[j-2"                                                     "]=42),k%%"
"20<1?puts(d"                                                      "-1),a++:0"
"){for(i=-1"                                                       ";i++<32;!"
"*z?q[662]"          "=0,z=q+207:"                 "*z+z[1]<6"     "5?z+=11:*"
"z==34?p=0"         ":0)d[i]=((k/2"               "0-1?275*q["     "*a+10]-8*"
"q[*a+0]-8"         ":128)>>(i/11+k/"           "4%%5*3))&1?k"     "/3*!j&&p?"
"j=34:(j="           "i+1,*z++):32;k/3*"     "j--&&p?d[z--,j]=3"   "4:0;}}int"
"*y,n=%d;/*..~",*f="nnLa5~z23~|22t$q(s82r&q(s82q'q(s8;q(s8;q(s8:" "r(s8:r(s8:"
"q)s89r)sLr#t+" "sLx,uJw-yGu/wnnnU",*g="nnLa<z::t$u88t(u67t*u57s,t56t,t56~v56"
"tF6tF6tF8t1p"   "Nu/qOv+rS}Xxnng";int main(int m,char**v){char a[2012],b[2012
],*p=a,*r=m>1     &&*v[1]=='e'?g:f,*q=b,*t=r;;sprintf(a,"%s%s%s",s,r==g?s+281:
s+168,s+386);     sprintf(b,a+22,a,34,32,24);for(sprintf(a,"%.33s/*%.28s*/%.3"
"3s/*%.28s*/%"   ".33s\"%s*/",b,b+66,b+33,b+76,b+66,b+99);*r;r++){;for(m=0;m++
<(*r-34)%77;*q++=*r>111?32:*p++)(q-b)%66<1?*q++=10:0;*r-110&&*r-126&&r-t<(t-g?
62:45)?*q++=34,((q-b)%66<1?*q++=10,*q++=34:0):0;}*q=0;puts(b+1);}/*IOCCC2012*/