Question

C++

include a class called VendingMachine.

A user can buy a bottle of water ($1.50), a bottle of coffee ($2.00), a chip ($1.00), and a chocolate bar ($2.50) from the machine. The user can select several item(s) if the items are available from the machine. Furthermore, the user can de-select item(s) that are already selected.

After finishing the selection of item(s), the user can pay for the items with either a debit card (Valid PIN: 7777) or cash. A user should pay the item(s) selected just one trial and if the user fails to pay due to the incorrect PIN or insufficient cash amount, the machine should de-select all sections the user chose.

Note that an administrator of the machine can refill the machine or reset it to the initial status.

At the payment() function, if a user provides incorrect payment information such as an incorrect PIN or insufficient money amount, all selections the user chose should be de-selected.

At the payment() function, if a user didn’t select any items before, the function should return false because there’s nothing to pay.

Answer 1

#include <iostream>

#include<functional>

using namespace std;

int options;

double chips,water,coffee,chocolate bar,milk,cola,quantity_chips,quantity_water,quantity_coffee,quantity_chocolate bar,quantity_milk,quantity_cola,payment,pi,error,tax,final_cost;

void menu()

{

cout<<"welcome .. \n";

do {    cout<<"select from menu..\n";

<< "\t1 chips ... $1.00\n"

<< " \t2 water........$1.50\n"

<< "\t3 coffee.....$2.00\n"

  << "\t4 chocolate bar.........$2.50\n"

cout<<"enter your option: ";

cin>>option;

switch(option)

{ case 1: cout<<"quantity:";

cin>>quantity_chips;

chips=(1*quantity_chips); break;

case 2:

cout<<"quantity:";

cin>>quantity_water;

water=(1.50*quantity_water); break;

case 3:

cout<<"quantity";

cin>>quantity_coffee;

coffee=(2*quantity_cofffee); break;

case 4:

cout<<"quantity";

cin>>quantity_chocolate bar;

chocolate bar=(2.5*quantity_chocolate bar); break;

case 5:

void checkout(); break;

default:

cout<<"invalid option:"<<endln;

}

} while(option<5);

}

void checkout() {

if(quantity_chips>0||quantity_water>0||quantity_coffee>0||quantity_chocolate bar>0) {

total=(chips)+(water)+(coffee)+(chocolate bar);

cout<<"select payment option (1:debit card 2:cash):";

cin>>payment;

if(payment=1)

{ void debit card(); }

else if(payment=2) { void cash(); }

else { cout<<"unknown option, please try again later \n";

} } else { cout<<"please select atleast one item \n"; } }

void debitcard()

{

error=1;

cout<<"enter pin:";

cin>>pin;

if(pin=7777) {

void receipt(); } else {

while(error>=1) {

cout<<"invalid pin. tryagain:";

cin>>pin;

error++;

if(pin=7777)

{ void receipt(); }

else{ cout<<"we are sorry.. invalid card details \n";

return; } } } }

void receipt()

{ cout<< "this is your reciept:\n";

if(quantity_chips>0) {

cout<<"chips:1.00 x"<< quantity_chips<<"=$"<<chips<<endl; }

if(quantity_water>0){

cout<<" water : 1.50 x"<<quantity_water<<"=$"<<water<<endl; }

if (quantity_coffee>0){

cout<<"coffee:2.00 x"<<quantity_coffee<<"=$"<<coffee<<endl; }

if(quantity_chocolate bar>0) {

cout<<"chocolate bar:2.50 x"<<quantity_chocolate bar<<"=$"<<chocolate bar<<endl; }

tax=(total* .10);

final_cost=tax+total;

cout<<"tax(12.2%): $"<<tax<<endl;

cout<<"total:$"<<final_cost<<endl;

}

int main()

{  

menu();

checkout();

debitcard();

receipt();

return 0;

}