Question

C code assignment

You work for Whole Foods Market and your boss asks you to develop a mini cashier. Write a C program to do the followings:

1. Take shopping carts of 3 customers
   1. Each customer has different number of items in his cart, you need to calculate the shopping cart total amount, then add tax to the total amount (for example 5%) and print the final number for each customer.

     Hint: we do not know how many items each customer has; therefore, your program should set a condition to stop or continue accepting items (for example: a char variable that sets to “c” to continue or “s” to stop).

For example:

customer #1 card = {milk, apple, pizza, apple tart}

Customer #2 card = {orange, yogurt, butter, beer, avocado, raspberries}

Customer #3 card = {roses, chocolate, greeting card}

Expected Output:

Customer #1: $14.78

Customer #2: $20.67

Customer #3: $34.56

**** Use of control flow (for loop, while loop, if-then-else) is REQUIRED ****

**** Prompt accordingly or lose 5 points right away ****

Answer 1

#include <stdio.h>
#include <stdlib.h>
#define TAX 5 /// 5% TAX
#define MAX 20
/// declare items
const char* itemSet[]={"milk", "apple ", "pizza", "apple tart","orange", "yogurt", "butter", "beer", "avocado", "raspberries","roses", "chocolate", "greeting card"};

/// prieceSet[0] is price for itemSet[0]
float priceSet[]={2,4,1,5,7,3.3,6.1,1.9,8,9,4.2,5.3,7};

void printMenu(){
int countOFItems=0; ///size of
countOFItems=sizeof(priceSet)/sizeof(float);
printf("\n\nSR.NO\tItem\t\tPrice\n");
int i=0;
for(i=0;i<countOFItems;i++){
printf("\n%d\t%s\t\t%f",i+1,itemSet[i],priceSet[i]);
}
printf("\n");
}

struct Customer{
///char* array to store items buy by that customer
char* items[MAX];
///count of items bought
int cnt;
///total price
float total_price;

};

/*
function to display all customers cart and amount bill that he have to pay
*/

void printCustomer(struct Customer cust[],int size){

int i=0,index=0;
for(index=0;index<size;index++){ /// for all customers
printf("\nItems Bought by customer %d :\n",index);
for(i=0;i<cust[index].cnt;i++){ /// for all items of that particular customer
printf("\n%s",cust[index].items[i]);
}
printf("\nAmount to pay = $ %f:",cust[index].total_price);
printf("\nTax to pay = %d Percent: ",TAX);
printf("\nTotal amount to pay = $ %f ", cust[index].total_price+(cust[index].total_price)*((float)TAX/100) );
printf("\n\n**********************\n");
}

}

int main()
{

int CustomerCount=0;
///ask user how many customers?
printf("\nEnter total no of customers :");
scanf("%d",&CustomerCount);
struct Customer customer1[CustomerCount];
///declare structre to store all cutomers
int index=0;
for (index=0;index<CustomerCount;index++) ///for all customers
{

printf("\nFor customer :%d\n",index);
///initialize cnt and price to 0
customer1[index].cnt=0;
customer1[index].total_price=0;

///iterate till user not enters s to Stop
char choice='c';
int itemIndex=0;

while(1)
{

printf("\nDo you want to continue ? Enter c to continue or s to stop :");
scanf(" %c",&choice);

if(choice=='s' || choice=='S')
break; /// if user wants to stop then break inner while loop
if(choice!='c' && choice!='C' )
{
printf("\nInvalid choice"); /// if user enterd other thaan s / c
continue;
}

/// add item SR NO from user
printMenu();
printf("\nEnter the SR.NO of item e.g -> 1 for item %s\n ",itemSet[0]);
scanf("%d",&itemIndex);

///add to structure member
customer1[index].items[customer1[index].cnt]=itemSet[itemIndex-1]; //itemIndex-1 bacause we hav started SR.NO numbers from 1 and index of array are from 0
customer1[index].cnt++; ///incrent count of items boughts
customer1[index].total_price=customer1[index].total_price + priceSet[itemIndex-1]; ///increment total price by items price

} ///end while

}/// for loop for customers

///print all customers cart and bill
printCustomer(customer1,CustomerCount);

return 0;
}