Data commit

Task/Power-set/C/power-set.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+struct node {
+	char *s;
+	struct node* prev;
+};
+
+void powerset(char **v, int n, struct node *up)
+{
+	struct node me;
+
+	if (!n) {
+		putchar('[');
+		while (up) {
+			printf(" %s", up->s);
+			up = up->prev;
+		}
+		puts(" ]");
+	} else {
+		me.s = *v;
+		me.prev = up;
+		powerset(v + 1, n - 1, up);
+		powerset(v + 1, n - 1, &me);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	powerset(argv + 1, argc - 1, 0);
+	return 0;
+}