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Need Help in multiply total by 10%

IconicStars (2)
//Hello guys... I'm new to here... I want to create multiply 10% as topic says, posted my code as follows

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#include <iostream>
#include <conio.h>
#include <iomanip>
using namespace std;

void menu();
void print_bill();

const double price_pizza = 19.99;

int quantity_pizza = 0;

int main()
{
	char my_input;

	while (1)
	{ system("cls");

    cout <<"Please select an action:" << endl;
	cout <<"[1]. Food Menu" << endl;
	cout <<"[0]. Exit" << endl;
	my_input = _getch();

	if (my_input == '1' )
	{
		menu();
	}

    
	if (my_input == '0' )
	{
		break;
	}
}
}

void menu ()
{
	   char input1;
	   system("cls");
       cout << endl;

	   while (1)
	   {
       cout <<" [1]. Pizza" << endl;
       cout <<" [8]. Main Menu" << endl;
       cout <<" [0]. Bill" << endl;
       cout << endl;

       int my_input, quantity;
       cout <<"Please select a menu:";
       my_input = _getch();

       if (my_input == '1' )
       {
            cout <<" Pizza" << endl;
       }
  
       else if (my_input == '8' )
       {
            break;
       }

       else if (my_input == '0' )
       {
           print_bill();
           break;
       }

       cout <<" Your Quantity:" << endl;
       cin >> quantity;

	   system("cls");

       if (my_input == '1' )
       {
            quantity_pizza += quantity;
       }
    }
}

void print_bill()
{
		
	   char input0;
	   system("cls");
	   cout << endl;
       cout << setfill(' ') << setw(2) << left << " Pizza ";
       cout << setfill(' ') << setw(10) << left << price_pizza;
       cout << setfill(' ') << setw(10) << left << quantity_pizza;
       cout << setfill(' ') << setw(10) << left << price_pizza * quantity_pizza;
       cout << endl;

      // cout << setfill(' ') << setw(6) << left << 'Add On 10% GST ';
     //  cout << setfill(' ') << setw(2) << left << price_pizza * quantity_pizza * 10%;
      // cout << endl;

       cout <<"Press any key back to the main menu" << endl;
       _getch();
}


//So.. My question is .. how to calculate the total amount of 10% GST ?
Last edited on
Naughty Albatross (1283)
Hi,
What is the assignment you are trying to solve?
IconicStars (2)
Actually I'm done solving my assignment...

I'm just want to add some feature about * 6% to get the amount, add on to the sub total and finally find out the grand total...
dhayden (5798)
C++ doesn't let you specify percentages directly. You have to use the decimal equivalent.
10% is 0.10, so at line 96, just replace 10% with 0.10. The grand total is 110% of the price: price_pizza*quantity_pizza*1.10.
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