请问为什么我这个程序只能输入四行而不是六行

#include<stdio.h>
#include<stdlib.h>
typedef struct child {
    int place;
    struct child* next;
} child;
typedef struct node {
    char data;
    int parent;
    child* child;
} node;
typedef struct tree {
    node a[100];
} tree;
tree cretree(int n) {
    tree tree1;
    for (int i = 0; i < n; i++) {
        scanf("%c %d", &tree1.a[i].data, &tree1.a[i].parent);
        tree1.a[i].child = NULL;
    }//输入部分就到这里了，这里好像不能输入n次，麻烦看看，谢谢
    for (int i = 0; i < n; i++) {
        if (tree1.a[i].parent != -1) {
            int q = tree1.a[i].parent;
            child* child1 = (child*)malloc(sizeof(child));
            child1->place = i;
            child1->next = NULL;
            if (tree1.a[q].child == NULL) {
                tree1.a[q].child = child1;
            }
            else {
                child* p = tree1.a[q].child;
                while (p->next != NULL) {
                    p = p->next;
                }
                p->next = child1;
            }
        }
    }
    return tree1;
}
int main() {
    tree tree1=cretree(9);
    return 0;
}
/*
a -1
b 2
c 3
e 2
f 0
g 0
输入样例*/

第18行 --- 第21行：

    for (int i = 0; i < n; i++) {
        getchar();
        scanf("%c %d", &tree1.a[i].data, &tree1.a[i].parent);
        tree1.a[i].child = NULL;
    }//输入部分就到这里了，这里好像不能输入n次，麻烦看看，谢谢