关于读取数据的问题

#include<stdio.h> #include<stdlib.h> typedef struct _BinTree { char data; struct _BinTree *LeftNode; struct _BinTree *RigthNode; }BinTree; BinTree BuidTree() { BinTree p1 = { 'A',nullptr,nullptr }; BinTree p2 = { 'B',nullptr,nullptr }; BinTree p3 = { 'C',nullptr,nullptr }; BinTree p4 = { 'D',nullptr,nullptr }; BinTree p5 = { 'E',nullptr,nullptr }; BinTree p6 = { 'F',nullptr,nullptr }; BinTree p7 = { 'G',nullptr,nullptr }; BinTree p8 = { 'H',nullptr,nullptr }; p1.LeftNode = &p2; p1.RigthNode = &p6; p2.RigthNode = &p3; p3.LeftNode = &p4; p3.RigthNode = &p5; p6.RigthNode = &p7; p7.LeftNode = &p8; return p1; } void ForEach(BinTree *bintree) { if (nullptr == bintree->LeftNode && nullptr == bintree->RigthNode) return; //前序遍历 根左右 DLR printf("%c\n", bintree->data); ForEach(bintree->LeftNode); ForEach(bintree->RigthNode); } void main() { ForEach(&BuidTree()); printf("Call Sucessfully!!! } 大家看一看 为啥会在执行第二次递归的时候没有权限读取数据 在下这块儿基础不是很扎实，忘各位大佬指点迷津