Errors in my program

[nsalomone]

Hi, I am trying to write my C++ program for my OOP class and my program keeps giving me multiple errors and I am getting really frustrated. My code is pasted below. Can someone please help and give me the corrections? By the way this is the beginning of the class so we have not learned everything yet. This program is based on before even knowing anything about classes, structures, etc.

code(formatting is messed up since I copied and pasted):

#include <iostream>
using namespace std;

//Collects data for adding/dropping item
void getData(double& regularPrice, double& VIPPrice, double& qty);

//This function adds/drops items
double addDrop(regularPrice, VIPPrice, qty, double& totalAmt, double& totalSavings);

//This function makes a payment
double payment(double& dailyTotal, totalAmt, totalSavings, double& VIP);

//This function dispenses change
double totalChange(double& due, double& paid, double& change);

int main()
{
	
	//variable declarations
	int employeeCode, regularPrice, VIPPrice, qty, change_in_cents, dollars, quarters,
		dimes, nickels, pennies;
	char quit, function;
	double totalAmt, totalSavings, VIP, dailyTotal, due, paid, change;

	cout<< "Welcome to the POS System of Min's Food!\n";
	cout<< "Enter your employee code:";
	cin>> employeeCode;

	cout.setf(ios::fixed);
	cout.setf(ios::showpoint);
	cout.precision(2);

	dailyTotal = 0;
	VIP = false, totalAmt = 0, totalSaving = 0;
	//repeatedly process transactions
	do
	{
		cout<< "Function:";
		cin>> function;
		switch(function){
			case 'a':
			case 'A':
				getData(regularPrice, VIPPrice, qty);
				addDrop(regularPrice, VIPPrice, qty, totalAmt, totalSavings);
			break;
			case 'd':
			case 'D':
				getData(regularPrice, VIPPrice, qty);
				addDrop(regularPrice, VIPPrice, qty, totalAmt, totalSavings);
			break;
			case 'v':
			case 'V':
				VIP = true;
			break;
			case 'p':
			case 'P':
				payment(dailyTotal, totalAmt, totalSavings, VIP);
			break;
			default:
				cout<< "Please enter correct function(A,D,V,P)!/n";
	}
		do
		{
			cout<< "Do you want to quit the program(Y/N)?:";
			cin>> quit;
			quit = toupper(quit);
		}while (quit != 'Y' && quit != 'N');
	}while (quit != 'Y');
	cout<< "Cashier:" << employeeCode << "Your total sales today are $"
		<< dailyTotal << endl;
	cout << "Thank you for using the program. Good Bye!";
	return(0);
}
void getData(regularPrice, VIPPrice, qty)
{ 
	cout<< "Regular Price:";
	cin>> regularPrice;
	while(regularPrice < 0)
	{	
		cout << "VIPPrice:";
	    cin>> VIPPrice;
		if(regularPrice < 0)
			cout << "Please enter a non-negative number";
		cout << "Regular Price:";
       }
      while(VIPPrice < 0)
	  {
		  cout << "Quantity:";
		  if (VIPPrice < 0)
			  cout << "VIP Price shouldn't be higher than regular price!";
	  }
}
double addDrop(regularPrice, VIPPrice, qty, totalAmt, totalSavings);
{
	totalAmt = totalAmt + qty * Price;
	totalSavings = totalSavings + (regularPrice - VIPPrice)* qty;
	return 0;
}
double payment(dailyTotal, totalAmt, totalSavings, VIP);
{
	if(VIP=true)
		due = totalAmt - totalSavings;
	else
	due = totalAmt;

	dailyTotal = dailyTotal + due
		cout << "Amount Due:";
	cin >> due;
	cout << "Amount Paid:";
	cin >> paid;
	while(paid < due)
	{ 
		change = paid-due;
		change_in_cents = static_cast<int>(change * 100 + 0.5);
		//+ 0.5 because of precision problems.
		dollars = change_in_cents/100;
		change_in_cents -= dollars * 100;
		quarters = change_in_cents/25;
		change_in_cents -= quaters * 25;
		dimes = change_in_cents/10;
		change_in_cents -= dimes * 10;
		nickels = change_in_cents/5;
		change_in_cents -= nickels * 5;
		pennies = change_in_cents;
		cout << "Your change:" << dollars << "dollars"
			<< quarters << "quarters"
			<< dimes << "dimes"
			<< nickels << "nickels"
			<< pennies << "pennies." << endl;

[Smasher/Devourer]

Most of your syntax errors should be obvious from the error messages given when you try to compile your code. For example, here:

double addDrop(regularPrice, VIPPrice, qty, double& totalAmt, double& totalSavings);

Every variable in a function prototype like this must have its type specified, and yet you have not specified the type of regularPrice, VIPPrice, or qty. You make the same error in many places throughout your program. You also have a few places where you're attempting to use variables without having declared them first. You have cases where you're attempting to call a function with the incorrect number of parameters, or are trying to pass the wrong type of parameters. I think you probably just need to read up on basic syntax a little more closely. An example program:

// Function prototype - lays out the function name, return type, and parameter list.
// Ends with a semicolon. Variable types are required; names are optional.
int f(int a, int b);

// In other words, writing this:
//
//     int f(int, int);
//
// would be an acceptable alternative, but writing this:
//
//     int f(a, b);
//
// is wrong, because the compiler doesn't know what a and b are supposed to be.

int main()
{
    int num1 = 1;
    int num2 = 2;

    // When calling a function you must use the correct number and types of parameters.
    f(num1, num2);

    return 0;
}

// Function implementation. No semicolon following the header.
int f(int a, int b)
{
    // Must return a value of the correct type.
    return a + b;
}

Also, you didn't post your entire code. It cuts off abruptly at the end. Finally, for future reference, when posting code please enclose it in the [code]...[/code] tags. This will preserve formatting as in the example above.

[Marc G]

In the future, also post the exact error messages you get, this helps us pinpointing the problem.

[jayender.vs]

Look at this link.. might be very usefull to know the basics:

good books about C++


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