构造树:
struct
{
char c;
tree *lchild;
tree *rchild;
};
tree *build ()
{
tree * t;
t= malloc(tree);
scanf("%c",&c);
if(c=='#')
t=null;
else
{
t->c=c;
t->lchild=bulid();
t->rchild=build();
}
return t;
}
可能不太对 先把今晚学的写写 避免忘了 具体再看师哥的吧