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//Code by: Kien KK
//date: 03/06/2015
//visual studio 2013
#include<iostream>
#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
typedef struct {
 int code;
 char name[30];
 int amount;
 float price;
}mathang;
typedef struct Node{
 struct Node *lc, *rc;
 mathang data;
}node;
typedef node *Tree;
node *getnode()
{
 node *p;
 p = (node*)malloc(sizeof(node));
 p->lc = NULL;
 p->rc = NULL;
 return p;
}
int insert(node *tr, node *root)
{
 if (tr->data.code == root->data.code) return 0;
 if (tr->data.code > root->data.code)
 {
  if (tr->lc == NULL)
   tr->lc = root;
  else{
   insert(tr->lc, root);
  }
 }
 if (tr->data.code < root->data.code)
 {
  if (tr->rc == NULL)
   tr->rc = root;
  else{
   insert(tr->rc, root);
  }
 }
 return 1;
}
void LNR(node *tr)
{
 if (tr != NULL){
  LNR(tr->lc);
  printf("\nTen mat hang %s\nMa hang %d\nSo luong %d\nGia tien %f ", tr->data.name, tr->data.code, tr->data.amount, tr->data.price);
  LNR(tr->rc);
 }
}

void HangDongGia(node *tr, float gia)
{

 if (tr != NULL)
 {
  if (tr->data.price == gia)
   printf("\nTen mat hang %s\nMa hang %d\nSo luong %d\nGia tien %f ", tr->data.name, tr->data.code, tr->data.amount, tr->data.price);
  HangDongGia(tr->lc, gia);
  HangDongGia(tr->rc, gia);
 }
}


int TinhTongMatHang(Tree c){
 if (c != NULL){
  int a = TinhTongMatHang(c->lc);
  int b = TinhTongMatHang(c->rc);
  return c->data.amount + a + b;
 }
 return 0;
}
float TinhTongGiaTien(Tree c){
 if (c != NULL){
  float a = TinhTongGiaTien(c->lc);
  float b = TinhTongGiaTien(c->rc);
  return c->data.price + a + b;
 }
 return 0;
}

int main()
{
 node *root, *p;
 root = NULL;
 int n, x, i, kt = 0;
 printf("Nhap so luong mat hang: ");
 scanf("%d", &n);
 printf("--------------------------------------\n");
 for (i = 0; i < n; i++)
 {
  p = getnode();
  do{
   printf("Nhap mat hang thu %d: \n", i + 1);
   fflush(stdin);
   printf("nhap ten mat hang: ");
   gets(p->data.name);
   printf("Nhap ma hang: ");
   scanf("%d", &x);
   p->data.code = x;
   printf("Nhap so luong hang: ");
   scanf("%d", &x);
   p->data.amount = x;
   printf("Nhap gia tien hang: ");
   scanf("%d", &x);
   p->data.price = x;
   if (root == NULL)
   {
    root = p;
    kt = 1;
   }
   else{
    kt = insert(root, p);
   }
  } while (kt == 0);
 }
 printf("Danh sach LNR: \n");
 LNR(root);
 printf("\n Nhap vao gia tien:");
 float k;
 scanf("%f", &k);
 HangDongGia(root, k);
 printf("\n Tong so luong hang: %d", TinhTongMatHang(root));
 printf("\n Tong gia tiet cac mat hang la: %f", TinhTongGiaTien(root));
 getch();
 return 0;
}