设计一个简单的二级文件系统

[{"title":"（ 13 个子文件 296KB ） 设计一个简单的二级文件系统","children":[{"title":"Debug","children":[{"title":"vc60.pdb <span style='color:#111;'> 52.00KB </span>","children":null,"spread":false},{"title":"menu.pdb <span style='color:#111;'> 569.00KB </span>","children":null,"spread":false},{"title":"vc60.idb <span style='color:#111;'> 41.00KB </span>","children":null,"spread":false},{"title":"menu.obj <span style='color:#111;'> 41.21KB </span>","children":null,"spread":false},{"title":"menu.exe <span style='color:#111;'> 220.05KB </span>","children":null,"spread":false},{"title":"menu.pch <span style='color:#111;'> 225.85KB </span>","children":null,"spread":false},{"title":"menu.ilk <span style='color:#111;'> 250.22KB </span>","children":null,"spread":false}],"spread":true},{"title":"menu.opt <span style='color:#111;'> 47.50KB </span>","children":null,"spread":false},{"title":"menu.dsp <span style='color:#111;'> 3.30KB </span>","children":null,"spread":false},{"title":"menu.plg <span style='color:#111;'> 736B </span>","children":null,"spread":false},{"title":"menu.dsw <span style='color:#111;'> 516B </span>","children":null,"spread":false},{"title":"menu.ncb <span style='color:#111;'> 49.00KB </span>","children":null,"spread":false},{"title":"menu.cpp <span style='color:#111;'> 22.86KB </span>","children":null,"spread":false}],"spread":true}]