Thread: C++ hw need help..

I cant figure out how to fix the loop for the program to work correctly and for it to display right..Please
help..

DrinkMachineInventory.txt-
Coca-Cola 0.75 20
Root Beer 0.75 20
Sprite 0.75 20
Spring Water 0.80 20
Apple Juice 0.95 20

Code:

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <cctype>
using namespace std;

struct Machine
{
    string name;
    double cost;
    int num;
};

void init(Machine []);
int menu(Machine[]); 
void payment(double);

int main()
{
    Machine drink[5];
    int choice;
    double made=0;
    init(drink);
    choice=menu(drink);
    while(choice!=5)
    {
        payment(drink[choice].cost);
        made+=drink[choice].cost;
        drink[choice].num--;
        choice=menu(drink);  
    }
    cout<<"Today the machine has made $"<<setprecision(2)<<fixed<<made<<endl;
    system("pause");
    return 0;
}

void payment(double p)
{
    double pay;
    cout<<"Your drink costs $"<<setprecision(2)<<fixed<<p<<endl;
    cout<<"Enter payment: ";
    cin>>pay;
    while(pay<0||pay>1.||pay<p)
    {
        cout<<"please insert the correct amount for your drink!\n";
        cout<<"maximum payment is $1.00\n";
        cout<<"Enter payment: ";
        cin>>pay;
    }
    cout<<"Your change is: $"<<setprecision(2)<<fixed<<pay-p<<endl;
    return;
}

void init(Machine d[])
{
    ifstream infile("DrinkMachineInventory.txt");

    if(infile.fail())
    {
        cout << "Could not find the file DrinkMachineInventory.txt \n";
        cout << "Exiting the program\n";
        exit(0);
    }

    int i=0;
    char ch;
    string word= "";

    while(!infile.eof())
    {
        word= "";
        ch = infile.get();
        while(true)
        {
            if(isdigit(ch) || ch == '\n')
                break;
            else
                word += ch;
            ch = infile.get();
        }

        if(word != "")
        {
            d[i].name = word;
            infile >> d[i].cost >> d[i].num ;
            i++;
        }
    }

    infile.close();   
}

int menu(Machine d[])
{
    int choice=8,i;
    bool soldout=true;
    while((choice<1||choice>6)||soldout)
    {
        soldout=false;
        cout<<"Menu\n";
        cout<<"      Drink      Cost\tleft\n";
        for(i=0;i<5;i++)
        {
            cout<<i+1<<". "<<setw(17)<<left<<d[i].name<<"\t";
            cout<<setprecision(2)<<fixed<<d[i].cost<…
        }
        cout<<"6. Exit\n";
        cout<<"Enter Choice ";
        cin>>choice;
        if(choice<1||choice>6)
            cout<<"invalid entry\n";
        else
            if(d[choice-1].num==0)
            {cout<<"sold out\n";
        soldout=true;
        }
    }
    return choice-1;
}