Task:
Design a vending machine which does the following:
Accepts coins of 1, 5, 10, 25, 50 cents or notes of 1 and 2
User selections: Candy, snacks, nuts, Coke, Pepsi and soda
Allow user by cancelling the request, returns the product and change,
Note : I understand the need of using std::cin/std::cout etc,. Just for simplicity I have not made this one particular change.
I will start making this change with my future codes.
Also, if you can please rate this code out of 10 for usage of design principles and where all I can apply them and which one.
Also, I have been asked to use pointers and memory management.
#include <iostream>
using namespace std;
class product
{
public :
const int MAX_STOCK = 10;
string *name = new string;
int *price = new int,
*remaining_stock = new int;
product(string n, int p)
{
*price = p;
*name = *name + n;
*remaining_stock = MAX_STOCK;
}
~product()
{
delete price;
delete name;
delete remaining_stock;
}
};
Class for money :
class money
{
public :
int *max = new int;
int *accepted_values = new int[10];
int i;
money()
{
}
money(int *a, int how_many)
{
*max = how_many;
//cout<<"\n this is max now : "<<*max;
for (i=0; i<how_many; i++)
{
*(accepted_values + i) = a[i];
//cout<<"\n inside money : "<<i<<" accepted value is "<<*(accepted_values + i)<<" value is a is :"<<a[i]<<endl;
}
}
int check(int value, int loop_max)
{
//cout<<"\nInside money checker, the value of max is :"<<loop_max;
bool present = 0;
//cout<<"\nInside money checker, the value of present is :"<<present;
for(i=0; i< loop_max; i++)
{
//cout<<"\n Accepted values - "<<i<<" is : "<<*(accepted_values + i)<<" value is :"<<value;
if (value == *(accepted_values + i))
{
//cout<<"\n value present!";
present = 1;
}
}
if(!present)
{
//cout<<"\n not present and present is now : "<<present;
value = 0;
}
return value;
}
~money()
{
delete max;
delete accepted_values;
}
};
Class vending machine :
class Vending_machine
{
public :
product *candy = new product("Candy",10);
product *snack = new product("Snack",50);
product *nuts = new product("Nuts",90);
product *coke = new product("Coke",25);
product *soda = new product("Soda",45);
int accepted_coins[5] = {1,5,10,25,50};
int accepted_notes[2] = {1,2};
money *coins = new money(accepted_coins, 5);
money *notes = new money(accepted_notes, 2);
int *amount_deposited = new int;
Vending_machine()
{
*amount_deposited = 0;
}
Vending_machine(bool reset)
{
if (reset == true)
{
*amount_deposited = 0;
//delete candy;
//delete snack;
//delete nuts;
//delete coke;
//delete soda;
//delete coins;
//delete notes;
product *candy = new product("Candy",10);
product *snack = new product("Snack",50);
product *nuts = new product("Nuts",90);
product *coke = new product("Coke",25);
product *soda = new product("Soda",45);
}
}
~Vending_machine()
{
delete candy;
delete snack;
delete nuts;
delete coke;
delete soda;
delete coins;
delete notes;
delete amount_deposited;
}
void get_money(int choice,int value)
{
switch(choice)
{
case(1):
//cout<<"\nthis is the value of amount deposited before : "<<*amount_deposited;
*amount_deposited = coins->check(value, *coins->max);
//cout<<"\nthis is the value of amount deposited after : "<<*amount_deposited;
break;
case(2):
//cout<<"\nthis is the value of amount deposited before : "<<*amount_deposited;
*amount_deposited = notes->check(value, *notes->max) * 100;
//cout<<"\nthis is the value of amount deposited after : "<<*amount_deposited;
break;
default:
*amount_deposited = 0;
}
}
void compare_availability(int *remain, int *price)
{
try
{
if(*remain !=0 && *amount_deposited >= *price)
{
*remain -= 1;;
*amount_deposited -= *price;
cout<<"\n Dispatched";
return_money('Y');
}
else if (*amount_deposited < *price)
{
throw "Amount deposited is low";
}
else if (*remain == 0)
{
throw "Stock not available";
}
else
{
throw "Unknown error";
}
}catch (const char* msg)
{
cout<<msg<<endl;
}
}
void get_selection(int selection)
{
switch(selection)
{
case (1):
compare_availability(candy->remaining_stock, candy->price);
break;
case (2):
compare_availability(snack->remaining_stock, snack->price);
break;
case (3):
compare_availability(nuts->remaining_stock, nuts->price);
break;
case (4):
compare_availability(coke->remaining_stock, coke->price);
break;
case (5):
compare_availability(soda->remaining_stock, soda->price);
break;
default:
cout<<"Wrong selection !"<<endl;
}
}
void return_money(char choice)
{
if (*amount_deposited != 0)
{
if (choice == 'Y' || choice == 'y')
{
cout<<"\n Your remaining change is : " << *amount_deposited/100.0 <<" $ \n";
*amount_deposited = 0;
}
}
}
};
main :
int main()
{
int main_select, main_coin_note, main_val;
char change_your_mind;
Vending_machine *a = new Vending_machine(1);
cout<<"Coin(1) or Note(2) : ";
cin>>main_coin_note;
cout<<"Enter your denomination :";
cin>>main_val;
a->get_money(main_coin_note, main_val);
if (*a->amount_deposited == 0)
{
cout<<"\n Wrong denomination, Value returned !";
}
else
{
cout<<"\tEnter what product you want :"<<endl<<"\t\t1 for Candy"<<endl<<"\t\t2 for Snack"<<endl<<"\t\t3 for Nuts"<<endl<<"\t\t4 for Coke"<<endl<<"\t\t5 for Soda\n\t :..";
cin>>main_select;
cout<<"\n You want to cancel request?(Y/N) :";
cin>>change_your_mind;
if (change_your_mind == 'Y' || change_your_mind == 'y')
{
a->return_money(change_your_mind);
}
else
{
a->get_selection(main_select);
}
}
}
