lỗi Error 1 error C2513: 'NODE *' : no variable declared before '='

báo lỗi Error 1 error C2513: ‘NODE *’ : no variable declared before ‘=’

#include<iostream>
using namespace std;
struct Node {
    int data;
    struct Node *pleft;
    struct Node *pright;
};
typedef struct Node NODE;
typedef NODE* Tree;
void Init(Tree &t) {
    Tree=NULL;
}
void Insert(Tree &t, int x) {
    if(t==NULL) {
        NODE *q = new NODE;
        q ->data = x;
        q->pleft = q->pright = NULL;
        t = q;
    } else {
        if(x < t->data)
            Insert(t->pleft, x);
        else if(x > t->data)
            Insert(t->pright, x);
    }
}
void NLR(Tree t) {
    if(t != NULL) {
        cout<<t->data<<"   ";
        NLR(t->pleft);
        NLR(t->pright);
    }
}
void LNR(Tree t) {
    if(t != NULL) {

        NLR(t->pleft);
        cout<<t->data<<"   ";
        NLR(t->pright);
    }
}
void LRN(Tree t) {
    if(t != NULL) {

        LRN(t->pleft);

        LRN(t->pright);
        cout<<t->data<<"   ";
    }
}

int menu() {
    int chon;
    cout<<"--------------------------menu--------------------------
"
        <<"1.
"
        <<"2.
"
        <<"3.
"
        <<"0.thoat"
        <<"--------------------------------------------------------
"
        <<"chon: ";
    cin>>chon;
    return chon;
}
void main() {
    int chon;
    Tree t;
    Init(t);
    do {
        chon = menu();
        switch(chon) {
        case 1: {
            int x;
            cout<<"nhap vao du lieu: ";
            cin>>x;
            Insert(t, x);
        }
        }
    } while(chon != 0);
}