Tutorial 3 Section A_2

// http://pastebin.com/u/TheWhiteFang
//Tutorial 3 Section A_2
#include <iostream>
#include <string>

using namespace std;

int main(){

    double price = 0, grandtotal = 0.0;
    float a = 0;
    int b = 0, c = 0;
    int numofitems = 0, totalitems = 0, tempprice = 0;
    string itemname = " ";

    cout << "Enter name of item <enter -1 to exit> : " ;
    getline(cin, itemname);


    while (itemname != "-1"){

        cout << "Enter the price of " << itemname << ": ";

        while (!(cin >> price)){

            cout << "invalid price enter again: ";
            cin.clear();
            cin.ignore(100, '\n');
        }

        cout << "Enter number of " << itemname << " bought :";

        while (!(cin >> numofitems)){

            cout << "invalid number of items... enter again: ";
            cin.clear();
            cin.ignore(100, '\n');
        }
        cout << endl;


        totalitems += numofitems;
        grandtotal += (numofitems*price);

        cout << "Enter name of another item <enter -1 to exit> : ";
        cin >> itemname;

    }

    cout << "\nTotal  number of items bought : " << totalitems;

    b = grandtotal;
    c = (grandtotal-b) * 100;
    cout << "\nCost of the items :" << b << " ringgit and " << c << " sen "<<endl;





    return 0;
}