对于一个复杂的OSG场景我们要对它进行保存和存储而此代码就是为保存一个复杂的OSG场景-For a complex OSG scene we want to save and store it and this code is to save a complex OSG scene

unix无界面时默认的计算器，即是现在在众多linux发行版中依然含有的计算器——bc。源码详细，可重新编译运行。-unix no interface default calculator, that is now in the many linux distributions still contain the calculator- bc. Source details, can be recompiled to run.