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Soda Vending Machine function issues

kingkush (282)
Im getting a lot of errors in my code and whenever i try to fix or change something I am getting even more errors. I started to write this program myself, but halfway through i began to use my teacher's template. I keep getting cout is ambiguous along with other errors including syntax errors, missing declarations and identifiers. Im feeling overwhelmed and dont know what to do.



*EDIT*
I just need help with my incomplete function. I do not understand how to access the structure and how to decrease the supply!! Thanks for any help



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  //Chapter 11 Program 13 Vending Machine Drink Simulator
// Written by 

#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <string> 

using namespace std; 

const int numDrinks = 5; //number of different drinks in vanding machine 

struct Drink
{
	string name;			// Drink name
	double price;    		// Price of the drink
	int num;			    // Number of cans in the machine
};


//*************************************************************************************************
//Get choice function. return that value - 1 due to subscript numbering                           *
//*************************************************************************************************
int getChoice(Drink m[])
{
	int choice;
	cout << " Please select a drink by pressing on the corresponding number" << endl;
	cout << " 1. Cola: .75cents " << endl;
	cout << " 2. Root Beer : .75cents " << endl;
	cout << " 3. Lemon - Lime: .75cents " << endl;
	cout << " 4. Grape Soda : .80cents " << endl;
	cout << " 5. Cream Soda : .80cents " << endl;
	cout << (numDrinks + 1) << " Leave the drink machine\n\n";
	cin >> choice; 

	if (choice > 6 || choice < 1)
	{
		cout << " Please choose a valid option. ";
	}
	return numDrinks;
}

//**************************************************************************************************
//Process Transaction: Process user choice and update earning variable                             *
//**************************************************************************************************
void ProcessTransaction(Drink m[], int choice, double &earnings)

int choice;
int i;
bool soldout = true;

while ((choice < 1 || choice > 6) || soldout)
{
	cout << " Please select a drink by pressing on the corresponding number" << endl;
	cout << " 1. Cola: .75cents " << endl;
	cout << " 2. Root Beer : .75cents " << endl;
	cout << " 3. Lemon - Lime: .75cents " << endl;
	cout << " 4. Grape Soda : .80cents " << endl;
	cout << " 5. Cream Soda : .80cents " << endl;
	cout << (numDrinks + 1) << " Leave the drink machine\n\n";
}

//**********************************************************************************************************
//Main                                                                                                     *
//**********************************************************************************************************
int main()
{
	// local variables
	//
	int 	choice = 0;					// Menu choice
	double 	earnings = 0.0;					// Drink machine earnings
	Drink 	machine[numDrinks] = 						// Array of drinks in the machine
	{
		// name				cost	quantityAvailable
		// -----------		----	-----------------
		{ "Cola     ", 0.75, 20 },
		{ "Root Beer", 0.75, 20 },
		{ "Lemon-Lime", 0.75, 20 },
		{ "Grape Soda", 0.80, 20 },
		{ "Cream Soda", 0.80, 20 }
	};

	// initialization
	cout << fixed << showpoint << setprecision(2);		// Set the floating-point output formatting.

	// Display the menu and process the user's choice.
	do
	{
		choice = GetChoice(machine);							// get the customer's choice
		if (choice != numDrinks)
			ProcessTransaction(machine, choice, earnings);	// Process the transaction.
	} while (choice != numDrinks);

	// Display the machine's total earnings
	//
	cout << "Total earnings: $" << earnings << endl;
	return 0;
}
Last edited on
booradley60 (896)
Put an opening brace { on line 47 and put a closing brace } on line 62. That should cut down a ton of errors.
kingkush (282)
Thank you! I really really appreciate your prompt reply!!! i did not notice i accidentally erased one brace. Im still getting a lot of errors even though i removed about 7. I am still getting the cout ambiguous error on lines 27-33, 38, and 55-61. Am i just forgetting to put braces?
Last edited on
CodeWriter (286)
int choice shadows the int choice in the parameter list of ProcessTransaction() and should be removed.
int i is not used in ProcessTransaction()
And in main GetChoice(machine) should be getChoice(machine) as c++ is case sensitive.
And ProcessTransactions doesn't seem to be doing anything.
You need it clear in your head the steps required before coding.
Last edited on
kingkush (282)
I was writing the program myself before using my teacher's template which is why there are some extra things not quite where they belong. I have opted to scrap what i did so far and start over from my teachers template. I need help on the processing function and how to determine if there is still a supply of soda in the machine. This is my code now. I need help starting with line 117. i get confused with how to point into struct to show the price.

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/****************************************************************************************

Chapter 11, Programming Challenge 13: Drink Machine Simulator

Written by: 

****************************************************************************************/

// ************************************************************************************** 
// INCLUDES
// ************************************************************************************** 

// system
//
#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <string>


using namespace std;

// ************************************************************************************** 
// CONSTANTS
// ************************************************************************************** 

const int NUM_DRINKS = 5;

// ************************************************************************************** 
// STRUCTURES
// ************************************************************************************** 

struct Drink
{
	string 	name;			// Drink name
	double	price;    		// Price of the drink
	int 	num;         	// Number of cans in the machine
};
Drink Beverage;

// ************************************************************************************** 
// FUNCTIONS
// ************************************************************************************** 


// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// GetChoice
//				This function gets the user's choice and returns that value minus one. 
//				This adjustment is made because the value will be used as a subscript 
// 				into the Drink array by the transaction function.
//
//
int GetChoice(Drink m[])
{
	// local constants
	//
	
	// local variables
	//
	int choice;
	
	// Display a list of drinks preceded by a number. This will be the menu.
	// cout << "Put code here to DISPLAY the list of available drinks and prices" << endl;
	cout << " Please select a drink by pressing on the corresponding number" << endl;
	cout << " 1. Cola: .75cents " << endl;
	cout << " 2. Root Beer : .75cents " << endl;
	cout << " 3. Lemon Lime: .75cents " << endl;
	cout << " 4. Grape Soda : .80cents " << endl;
	cout << " 5. Cream Soda : .80cents " << endl;
	

	// Display the last menu item, which is to leave the drink machine.
	//
	cout << (NUM_DRINKS + 1) << " Leave the drink machine\n\n";

	// Get the user's choice.
	//
	cin >> choice;
	// Validate the choice.
	//
	if (choice > 6 || choice < 1)
	{
		cout << " Please choose a valid option. ";
	}
	// Return the choice
	//
	return NUM_DRINKS;		/* THIS TEMPLATE JUST RETURNS THE QUIT CHOICE*/
}


// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// ProcessTransaction
//				Process the user's choice and update the earnings variable
//
//
void ProcessTransaction(Drink m[], int choice, double &earnings)
{
	float moneyRecieved;
	float change; 
	// If the selected drink is sold out, display a message and get out of this function.
	// otherwise
	// Get some money from the customer. (ie. have the user input up to 1.00)
	//
	cout << " Please enter an amount less than $1.00 to pay for your drink. ";
	cin >> moneyRecieved;

	// Make sure the customer entered at least enough for the selected drink, and no more than $1.00.
	// 
	if (moneyRecieved < 0 || moneyRecieved > 1)
	{
		cout << " Sorry. This vending machine does not accept money over $1.00. ";
	}
	// Process the selection and give back any change that is due.
	//
	change = moneyRecieved - Beverage.price - 1;
	// if theMoneyReceived >= thePriceOfTheSelectedItem
	{
		// Dispense the drink message

		// Calculate any change that is due.

		// If change is due, give it to the customer.

		// Update our earnings.

		// Decrease the number of cans of the selected drink currently in the machine.

		// Display the number of cans of this drink currently in the machine.
	}
}

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// main
//
//
int main()
{
	// local variables
	//
	int 	choice = 0;					// Menu choice
	double 	earnings = 0.0;					// Drink machine earnings
	Drink 	machine[NUM_DRINKS] = 						// Array of drinks in the machine
	{
		// name				cost	quantityAvailable
		// -----------		----	-----------------
		{ "Cola     ", 0.75, 20 },
		{ "Root Beer", 0.75, 20 },
		{ "Lemon-Lime", 0.75, 20 },
		{ "Grape Soda", 0.80, 20 },
		{ "Cream Soda", 0.80, 20 }
	};

	// initialization
	//
	cout << fixed << showpoint << setprecision(2);		// Set the floating-point output formatting.

	// Display the menu and process the user's choice.
	//
	do
	{
		choice = GetChoice(machine);							// get the customer's choice
		if (choice != NUM_DRINKS)
			ProcessTransaction(machine, choice, earnings);	// Process the transaction.
	} while (choice != NUM_DRINKS);

	// Display the machine's total earnings
	//
	cout << "Total earnings: $" << earnings << endl;
	return 0;
}
Last edited on
kingkush (282)
This is where i am at now. I am having issues with line 127. Same area but i filled out more code but i still cant figure out what to do. This is where i am at.

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/****************************************************************************************


Chapter 11, Programming Challenge 13: Drink Machine Simulator

Written by: 

****************************************************************************************/

// ************************************************************************************** 
// INCLUDES
// ************************************************************************************** 

// system
//
#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <string>


using namespace std;

// ************************************************************************************** 
// CONSTANTS
// ************************************************************************************** 

const int NUM_DRINKS = 5;

// ************************************************************************************** 
// STRUCTURES
// ************************************************************************************** 

struct Drink
{
	string 	name;			// Drink name
	double	price;    		// Price of the drink
	int 	num;         	// Number of cans in the machine
};
Drink Beverage;

// ************************************************************************************** 
// FUNCTIONS
// ************************************************************************************** 


// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// GetChoice
//				This function gets the user's choice and returns that value minus one. 
//				This adjustment is made because the value will be used as a subscript 
// 				into the Drink array by the transaction function.
//
//
int GetChoice(Drink m[])
{
	// local constants
	//
	
	// local variables
	//
	int choice;
	
	// Display a list of drinks preceded by a number. This will be the menu.
	// cout << "Put code here to DISPLAY the list of available drinks and prices" << endl;
	cout << " Please select a drink by pressing on the corresponding number" << endl;
	cout << " 1. Cola: .75cents " << endl;
	cout << " 2. Root Beer : .75cents " << endl;
	cout << " 3. Lemon Lime: .75cents " << endl;
	cout << " 4. Grape Soda : .80cents " << endl;
	cout << " 5. Cream Soda : .80cents " << endl;
	

	// Display the last menu item, which is to leave the drink machine.
	//
	cout << (NUM_DRINKS + 1) << " Leave the drink machine\n\n";

	// Get the user's choice.
	//
	cin >> choice;
	// Validate the choice.
	//
	if (choice > 6 || choice < 1)
	{
		cout << " Please choose a valid option. ";
	}
	// Return the choice
	//
	return choice;		/* THIS TEMPLATE JUST RETURNS THE QUIT CHOICE*/
}


// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// ProcessTransaction
//				Process the user's choice and update the earnings variable
//
//
void ProcessTransaction(Drink m[], int choice, double &earnings)
{
	float moneyRecieved;
	float change;
	// If the selected drink is sold out, display a message and get out of this function.
	// otherwise
	// Get some money from the customer. (ie. have the user input up to 1.00)

	cout << " Please enter an amount less than $1.00 to pay for your drink. ";
	cin >> moneyRecieved;

	// Make sure the customer entered at least enough for the selected drink, and no more than $1.00.
	
	if (moneyRecieved < 0 || moneyRecieved > 1)
	{
		cout << " Sorry. This vending machine does not accept money over $1.00. ";
	}
	// Process the selection and give back any change that is due.
	
	
	if (moneyRecieved >= Beverage.price)
	{
		cout << "Your money is being processed. Your drink will be dispensed shortly. ";
	}
	{
		// Dispense the drink message

		// Calculate any change that is due.
	change = moneyRecieved - Drink[choice + 1].price;
		// If change is due, give it to the customer.
		cout << "Here is your change: " << change << " Thank you for purchasing a drink! ";
		// Update our earnings.
		earnings = moneyRecieved - change; 
		// Decrease the number of cans of the selected drink currently in the machine.

		// Display the number of cans of this drink currently in the machine.
	}
}

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// main
//
//
int main()
{
	// local variables
	//
	int 	choice = 0;					// Menu choice
	double 	earnings = 0.0;					// Drink machine earnings
	Drink 	machine[NUM_DRINKS] = 						// Array of drinks in the machine
	{
		// name				cost	quantityAvailable
		// -----------		----	-----------------
		{ "Cola     ", 0.75, 20 },
		{ "Root Beer", 0.75, 20 },
		{ "Lemon-Lime", 0.75, 20 },
		{ "Grape Soda", 0.80, 20 },
		{ "Cream Soda", 0.80, 20 }
	};

	// initialization
	//
	cout << fixed << showpoint << setprecision(2);		// Set the floating-point output formatting.

	// Display the menu and process the user's choice.
	//
	do
	{
		choice = GetChoice(machine);							// get the customer's choice
		if (choice != NUM_DRINKS)
			ProcessTransaction(machine, choice, earnings);	// Process the transaction.
	} while (choice != NUM_DRINKS);

	// Display the machine's total earnings
	//
	cout << "Total earnings: $" << earnings << endl;
	return 0;
}
Last edited on
CodeWriter (286)
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void ProcessTransaction(Drink m[], int choice, double &earnings)
{
    ...

	    change = moneyRecieved - m[choice+1].price;
    ...
}


Suggestion is to type the type of error thrown up by the compiler into google.
Last edited on
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