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HELP ME WITH THIS PLEASE, MY PROJECT! '::main' must return 'int' error

PePoPoii (2)
#include<iostream>
#include<cmath>
using namespace std;

void main()
{

int code, qty, cash;
double tDue, change;


cout<<"\t\t\tWelcome to DuaNetopia!"<<endl<<endl;
cout<<"Hour Codes and Price"<<endl<<endl;
cout<<"1 1 Hour Php25"<<endl;
cout<<"2 2 Hours Php50"<<endl;
cout<<"3 3 Hours Php75"<<endl;
cout<<"4 4 Hours Php100"<<endl;
cout<<"5 5 Hours Php120 Promo!"<<endl;
cout<<"6 Play All You Can Php1000"<<endl<<endl;

cout<<"Enter Code: ";
cin>>code;


switch (code)
{
case 1: cout<<"1 Hour Php25";
cout<<"How Many?: ";
cin>>qty;

{
if (qty<0)
cout<<"Invalid Quantity Number"<<endl;
else
tDue=25*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}


break;

case 2: cout<<" 2 Hours Php50"<<endl;
cout<<"How Many?: ";
cin>>qty;

{
if (qty<0)
cout<<"Invalid Quantity Number"<<endl;
else
tDue=50*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}

break;

case 3: cout<<"3 Hours Php75";
cout<<" How Many?: ";
cin>>qty;

{
if (qty<0)
cout<<"Invalid Quantity Number"<<endl;
else
tDue=75*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}

break;

case 4: cout<<"4 Hours Php100";
cout<<" How Many?: ";
cin>>qty;

{
if (qty<0)
cout<<"Invalid Quantity Number"<<endl;
else
tDue=100*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}

break;

case 5: cout<<"5 Hours Php120 Promo!";
cout<<" How Many?: ";
cin>>qty;

{
if (qty<0)
cout<<"Invalid Quantity Number"<<endl;
else
tDue=120*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}

break;

case 6: cout<<"Play All You Can Php1000";

tDue=1000*qty;
cout<<"Total Due: "<<tDue<<endl;
}

cout<<"Cash: ";
cin>>cash;

change=cash-tDue;

{
if (cash<0 || cash<tDue)
cout<<"Invalid Cash"<<endl;
else
cout<<"Change: "<<change<<endl<<endl;
}

break;

default: cout<<"Invalid Hour Code"<<endl<<endl;

}

cout<<"=============== CHANGE BREAKDOWN ==============="<<endl;
Stewbond (2827)
You have two major problems:
1. You are using void main(). You should use int main() and then use return 0; at the end of the main function.
2. Your {s and }s are mismatched. I can tell because you have breaks and default: outside of the switch statement. Proper formatting will help you with this. Since you didn't use code tags, I can't tell what your indenting looks like. You also have a cout<< in the global scope, meaning that it isn't in any function.

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#include<iostream>
#include<cmath>
using namespace std;

int main() //main() should be int, not void
{
	int code, qty, cash;
	double tDue, change;

	cout<<"\t\t\tWelcome to DuaNetopia!"<<endl<<endl;
	cout<<"Hour Codes and Price"<<endl<<endl;
	cout<<"1	 1 Hour	 Php25"<<endl;
	cout<<"2	 2 Hours Php50"<<endl;
	cout<<"3	 3 Hours Php75"<<endl;
	cout<<"4	 4 Hours Php100"<<endl;
	cout<<"5	 5 Hours Php120 Promo!"<<endl;
	cout<<"6	 Play All You Can	 Php1000"<<endl<<endl;

	cout<<"Enter Code: ";
	cin>>code;

	switch (code)
	{
	case 1: cout<<"1 Hour Php25";
		cout<<"How Many?: ";
		cin>>qty;

		{ // Why are you using these?
			if (qty<0)
				cout<<"Invalid Quantity Number"<<endl;
			else
				tDue=25*qty;
			cout<<"Total Due: "<<tDue<<endl;
		}

		cout<<"Cash: ";
		cin>>cash;

		change=cash-tDue;

		{
			if (cash<0 || cash<tDue)
				cout<<"Invalid Cash"<<endl;
			else
				cout<<"Change: "<<change<<endl<<endl;
		}

		break;

	case 2: cout<<" 2 Hours Php50"<<endl;
		cout<<"How Many?: ";
		cin>>qty;

		{
			if (qty<0)
				cout<<"Invalid Quantity Number"<<endl;
			else
				tDue=50*qty;
			cout<<"Total Due: "<<tDue<<endl;
		}

		cout<<"Cash: ";
		cin>>cash;

		change=cash-tDue;

		{
			if (cash<0 || cash<tDue)
				cout<<"Invalid Cash"<<endl;
			else
				cout<<"Change: "<<change<<endl<<endl;
		}	

		break;

	case 3: cout<<"3 Hours Php75";
		cout<<" How Many?: ";
		cin>>qty;

		{
			if (qty<0)
				cout<<"Invalid Quantity Number"<<endl;
			else
				tDue=75*qty;
			cout<<"Total Due: "<<tDue<<endl;
		}

		cout<<"Cash: ";
		cin>>cash;

		change=cash-tDue;

		{
			if (cash<0 || cash<tDue)
				cout<<"Invalid Cash"<<endl;
			else
				cout<<"Change: "<<change<<endl<<endl;
		}	

		break;

	case 4: cout<<"4 Hours Php100";
		cout<<" How Many?: ";
		cin>>qty;

		{
			if (qty<0)
				cout<<"Invalid Quantity Number"<<endl;
			else
				tDue=100*qty;
			cout<<"Total Due: "<<tDue<<endl;
		}

		cout<<"Cash: ";
		cin>>cash;

		change=cash-tDue;

		{
			if (cash<0 || cash<tDue)
				cout<<"Invalid Cash"<<endl;
			else
				cout<<"Change: "<<change<<endl<<endl;
		}	

		break;

	case 5: cout<<"5 Hours Php120 Promo!";
		cout<<" How Many?: ";
		cin>>qty;

		{
			if (qty<0)
				cout<<"Invalid Quantity Number"<<endl;
			else
				tDue=120*qty;
			cout<<"Total Due: "<<tDue<<endl;
		}

		cout<<"Cash: ";
		cin>>cash;

		change=cash-tDue;

		{
			if (cash<0 || cash<tDue)
				cout<<"Invalid Cash"<<endl;
			else
				cout<<"Change: "<<change<<endl<<endl;
		}	

		break;

	case 6: cout<<"Play All You Can	 Php1000";

		tDue=1000*qty;
		cout<<"Total Due: "<<tDue<<endl;
	} // This ends the switch, but you have default later

	cout<<"Cash: ";
	cin>>cash;

	change=cash-tDue;

	{
		if (cash<0 || cash<tDue)
			cout<<"Invalid Cash"<<endl;
		else
			cout<<"Change: "<<change<<endl<<endl;
	}

	break; // You're not in the swtich anymore, 

	default: cout<<"Invalid Hour Code"<<endl<<endl; // You're not in the switch anymore

	//You're at the end of main() here, you must return a value: i.e. 
	//return 0;
}

//cout<<"=============== CHANGE BREAKDOWN ==============="<<endl; This isn't in your main function, that is ended
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