Question

Write an app in C or C++ to calculate amount due for Food-to-Go restaurant. Food-to-Go sells chicken sandwiches, chips, and drinks. Generate a function calculateAmountdue() to calculate for the total amount due.

Menu:

Sandwiches

(1) Chicken Sandwich ($5)

​(2) Hotdog ($4)​

(3) Pretzel ($3)

Chips

(1) Potato chips ($0.75)

​(2) Nachos ($3.50)​

(3) Popcorn ($2.50)

Drinks

(1) Soda ($2)​​

(2) Lemonade ($1.50)

​(3) Water ($1)

Example 1

Enter your selections (enter 0 if not ordering)

Enter sandwich selection: 2

How many: 2

Enter chip selection: 3

How many:1

Enter drink selection: 1

How many: 2

ITEMIZED

Sandwiches: $16

Chips: $2.50

Drinks: $4

TOTAL: $22.50

Example 2

Enter your selections (enter 0 if not ordering)

Enter sandwich selection: 0

How many: 0

Enter chip selection: 2

How many:2

Enter drink selection: 3

How many: 3

ITEMIZED

Sandwiches: $0

Chips: $7.00

Drinks: $3

TOTAL: $10.00

Answer 1

First we need to store the prices of items ,for which i have used array data structure.

Prices array for each array look like:

Index	Element value
0	0 (if selection is 0 price is 0)
1	price of selection-1
2	price of selection-2
3	price of selection-2

Example:For sandwich the price array look like

Index	Element value
0	0
1	5
2	4
3	3

One more array of size 2 ,for each item is required to store the selection number and quantity.(taken from user)

index-0 stores selection-no

index-1 stores quantity

To find the totaldue amount,find dueamount for each item and sum them.

Dueamount for each element :price of Selected sub-item*quantity;

Example:For chips dueamount =chips[c[0]]*c[1] where c[0] has the selection-no,chips[c[0]] has the price of the selected sub-item and c[1] has the quantity.

Program in c:

#include <stdio.h> //Declared all variables global,so that any function can access //Arrays to store prices of items float sandwiches[4]={0,5,4,3}; float chips[4]={0,0.75,3.50,2.50}; float drinks[4]={0,2,1.5,1}; //arrays to store selection-no and quantity int s[2],c[2],d[2]; void calculateAmountdue() { float totaldue; totaldue=sandwiches[s[0]]*s[1]+chips[c[0]]*c[1]+drinks[d[0]]*d[1];    printf("ITEMIZED\n"); printf("sandwiches:$%.2f\n",sandwiches[s[0]]*s[1]); printf("Chips:$%.2f\n",chips[c[0]]*c[1]); printf("Drinks:$%.2f\n",drinks[d[0]]*d[1]); printf("Total:$%.2f",totaldue);    } int main() {    printf("Enter your selections(Enter 0 if not ordering)\n");    //selection of sandwiches printf("Enter sandwich selection:"); scanf("%d",&s[0]); printf("How many:"); scanf("%d",&s[1]); //selection of chips printf("Enter chips selection:"); scanf("%d",&c[0]); printf("How many:"); scanf("%d",&c[1]);    //selection of drinks printf("Enter drinks selection:"); scanf("%d",&d[0]); printf("How many:"); scanf("%d",&d[1]);    calculateAmountdue(); return 0; }