修改文件结构。

POP/07/Optional04.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+int pickedColor[6] = { 0 };
+
+bool pickNextColor(int layer, int maxColorCount) {
+	int i = 1;
+	if (layer == 6) {
+		if ((pickedColor[1] != pickedColor[5])
+			&& (pickedColor[1] != pickedColor[4])
+			&& (pickedColor[1] != pickedColor[3])
+			&& (pickedColor[5] != pickedColor[4])
+			&& (pickedColor[3] != pickedColor[4])
+			&& (pickedColor[4] != pickedColor[2])
+			&& (pickedColor[3] != pickedColor[2])) {
+			printf("Min color required: %d\n", maxColorCount);
+			printf("A: %d\nB: %d\nC: %d\nD: %d\nE: %d\n",
+				pickedColor[1], pickedColor[2], pickedColor[3], pickedColor[4], pickedColor[5]);
+			return true;
+		}
+		else {
+			return false;
+		}
+	}
+	else {
+		for (i = 1; i <= maxColorCount; i++) {
+			pickedColor[layer] = i;
+			if (pickNextColor(layer + 1, maxColorCount)) {
+				return true;
+			}
+		}
+		return false;
+	}
+}
+
+int main() {
+	int maxColorCount = 2;
+	while (!pickNextColor(1, maxColorCount)) {
+		maxColorCount++;
+	}
+	return 0;
+}