/* write a program that reads a number of items user purchased in the store, num_items 
then the program reads num_items prices (integers)
and then the program finds the total price using the following discount rules:
if the price <=10 - 5% discount
if the price >10 and price<=20 10%discount
15% discount for all items price>20


use array to store prices
the program should print  random array and an updated price for each item (float or double)
and the total price after discount 
*/

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

#define SIZE 10000
int main(){
	int price[SIZE], i,num_items;
	double new_price, sum=0.0;

	printf("enter number of items\n");
	scanf("%d",&num_items);
	if(num_items>0 && (num_items<=SIZE)){
		
		printf("prices are\n");
		for(i=0;i<num_items;i++){
			price[i]=1+rand()%50;
			printf("%d ",price[i]);
		}
		printf("\n");
		for(i=0;i<num_items;i++){
			if(price[i]<=10)
				new_price=price[i]*0.95;
			else if(price[i]>10 && price[i]<=20)
				new_price=price[i]*0.9;
			else
				new_price=price[i]*0.85;
			
			printf("new price %f\n",new_price);
			sum+=new_price;
		}
		printf("total price is %f\n",sum);
	}
	else
		printf("invalid input\n");
	return 0;
}