不记得是什么时候从哪下的了,一个dos的tree源码,它对输入参数的检查那块很经典,整个就两个函数,虽然很简单,但很值得一读- Where not remember what time of the next, a dos source of tree, it checks the input parameters is a classic piece, the whole on the two functions, although very simple, but it is worth