Data commit

Task/One-dimensional-cellular-automata/C/one-dimensional-cellular-automata-1.c

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <string.h>
+
+char trans[] = "___#_##_";
+
+#define v(i) (cell[i] != '_')
+int evolve(char cell[], char backup[], int len)
+{
+	int i, diff = 0;
+
+	for (i = 0; i < len; i++) {
+		/* use left, self, right as binary number bits for table index */
+		backup[i] = trans[ v(i-1) * 4 + v(i) * 2 + v(i + 1) ];
+		diff += (backup[i] != cell[i]);
+	}
+
+	strcpy(cell, backup);
+	return diff;
+}
+
+int main()
+{
+	char	c[] = "_###_##_#_#_#_#__#__\n",
+		b[] = "____________________\n";
+
+	do { printf(c + 1); } while (evolve(c + 1, b + 1, sizeof(c) - 3));
+	return 0;
+}

Task/One-dimensional-cellular-automata/C/one-dimensional-cellular-automata-2.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+char trans[] = "___#_##_";
+
+int evolve(char c[], int len)
+{
+	int i, diff = 0;
+#	define v(i) ((c[i] & 15) == 1)
+#	define each for (i = 0; i < len; i++)
+
+	each c[i]  = (c[i] == '#');
+	each c[i] |= (trans[(v(i-1)*4 + v(i)*2 + v(i+1))] == '#') << 4;
+	each diff += (c[i] & 0xf) ^ (c[i] >> 4);
+	each c[i]  = (c[i] >> 4) ? '#' : '_';
+
+#	undef each
+#	undef v
+	return diff;
+}
+
+int main()
+{
+	char c[] = "_###_##_#_#_#_#__#__\n";
+
+	do { printf(c + 1); } while (evolve(c + 1, sizeof(c) - 3));
+	return 0;
+}