第四章第二题能给点提示吗？非常感谢

hello, me again.^_^.I get stuck on 4-7, could you give me some hint? thank you very much. ps. i already know this stage is something like 8 queens problem

I am not sure how to format the txt file. Can you please help?

Your games are like beginner Zack-like games-- Fewjix-like games. Zack-like games are difficult, designed for programmers and I bet most people get stuck mid game. Please keep doing what you are doing. I want to keep playing your games to level up my coding skills. BTW I have played most of the games tagged "programming" and yours are one of the best....

第二章第三题，无法运行第一个代码文件是咋回事？