add a base complete quiz 2 cpp code

.gitignore

@@ -0,0 +1,4 @@
+.vscode
+
+**/outfile.txt
+**/a.out

prob2/quiz2.cpp

@@ -0,0 +1,58 @@
+#include <iostream>
+
+struct stack {
+	int obj[6] = {0, 0, 0, 0, 0, 0};
+	int next = 0;
+	int out[6] = {0, 0, 0, 0, 0, 0};
+	int out_next = 0;
+};
+
+void out (stack s) {
+	std::cout << "{ ";
+	for (int i = 0; i < s.next; i++) std::cout << s.obj[i] << " ";
+	std::cout << "// ";
+	for (int i = 0; i < s.out_next; i++) std::cout << s.out[i] << " ";
+	std::cout << "}" << std::endl;
+}
+
+void loop (stack s, int next) {
+	
+	if (s.out_next == 6) {
+		for (int i = 0; i < s.out_next; i++) std::cout << s.out[i] << " ";
+		std::cout << std::endl;
+		return;
+	}
+	
+	if (next < 7) {
+		stack sn = stack(s);
+		sn.obj[sn.next] = next;
+		sn.next++;
+		// std::cout << "[DBUG] way IN" << std::endl;
+		// std::cout << "[DBUG][RA]" << s.out_next << std::endl;
+		// std::cout << "[DBUG][XM]"; out(sn);
+		loop(sn, next+1);
+	}
+	
+	if (s.next != 0) {
+		stack sb = stack(s);
+		sb.out[sb.out_next] = sb.obj[sb.next-1];
+		sb.obj[sb.next-1] = 0;
+		sb.next--;
+		sb.out_next++;
+		// std::cout << "[DBUG] way OUT" << std::endl;
+		// std::cout << "[DBUG][RA]" << s.out_next << std::endl;
+		// std::cout << "[DBUG][XM]"; out(sb);
+		loop(sb, next);
+	}
+	
+}
+
+int main () {
+	
+	loop (stack(), 1);
+	
+	std::cout << "over" << std::endl;
+	
+	return 0;
+	
+}