datstruct BST

#include<string.h>
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<malloc.h>

void clrscrn() {
    ("system @cls ||clear");
}

struct Node {
	int price;
	int code;
	struct Node *right, *left;
};

struct Node* root = NULL;

void menu() {
	printf("NOKIYEM CELLULAR PHONE\n");
	printf("- - - - - - - - - - - \n");
	printf("\n1. Add new phone\n");
	printf("2. Update phone price\n");
	printf("3. In-order, Pre-order, Post-order\n");
	printf("4. Exit\n");
	printf("\n> Input choice : ");
}

int main() {
	int pil, harga;
	int kode;

	menu();
	scanf("%d", &pil);
	switch(pil) {
		case 1: {
			do {
				printf("Input phone code N[1-9][0-9][0-9][0-9] : N");
				scanf("%d", &kode);
			} while (kode<1000 || kode>9999);
			do {
				printf("Input phone price [$50..$999] : ");
				scanf("%d", &harga);
			} while (harga<50 || harga>999);
			break;
		}
		case 2: {

			break;
		}
	}
}