a17sol

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a17sol / 110.c

Created March 16, 2025 20:42

Rule 110 simulation in a single variable/register. This approach can be used for hardware implementations, using a long shift register and a minimal number of logic gates.

	#include <stdint.h>
	#include <stdio.h>

	void main(void) {
	register uint32_t line = 0b100;
	for (int i = 0; i < 30; i++) {
	for (int j = 0; j < 30; j++) {
	putchar(((line & 0b100) >> 2) * ('#' - ' ') + ' ');
	line >>= 1;
	uint8_t cond = line & 0b111;

a17sol / quine_clock.c

Created July 27, 2024 01:14

Quine clock without cheating like linker source code embedding etc. Inspired by https://gist.github.com/rexim/f582098611b2be202051ba543e21da05. Compile: gcc -include stdio.h -include string.h -include time.h -include unistd.h quine_clock.c

	char s="char s=%c%s%c; char S[1024];int d[] = {32319,31812,19129,32437,31879,991\
	1,30399,4001,32447,32439,320};void main(){sprintf(S,s,34,s,34,34,92,34,34,34,34,34\
	,34,92,34,10);for(;;){int lin=-3,G=-5,i=0;for(i;i<strlen(S);i++){time_t t=time(0);\
	printf(%c%cx1b[%%s%c,(d[ctime(&t)[G/4+11]-48]>>(lin+(G%4)*5))&1&&!((G-15)/16)&&!((\
	lin-2)/3)?%c31m%c:%c90m%c);putchar(S[i]);G+=i%2;if(G>35){putchar(lin<2?92:0);putch\
	ar(10);lin++;G=-5;}}sleep(1);printf(%c%cx1b[11A%c);}}%c"; char S[1024];int d[] = {
	32319,31812,19129,32437,31879,9911,30399,4001,32447,32439,320};void main(){sprintf
	(S,s,34,s,34,34,92,34,34,34,34,34,34,92,34,10);for(;;){int lin=-3,G=-5,i=0;for(i;i
	<strlen(S);i++){time_t t=time(0);printf("\x1b[%s",(d[ctime(&t)[G/4+11]-48]>>(lin+(
	G%4)*5))&1&&!((G-15)/16)&&!((lin-2)/3)?"31m":"90m");putchar(S[i]);G+=i%2;if(G>35){