ADDING WHILE LOOP !

[danzal]

how do i add a while loop so that after they are done with a function they can choose a function again ?

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include <cmath>

void VIEWAPPOINTMENTS();
void ADDBOOKINGS();
void VIEWPATIENTSRECORD();
void CALCULATEBMI();
void VIEWDATA();

using namespace std;

int main()
{
	char ch;
	int choice;
	string userID, password;
	string pwdId, pwd;
	bool found = false;
	int i = 0;
	cout << "----------------Login Screen--------------------" << endl;

	
		cout << "Please enter your username : ";
		cin >> userID;
		cout << "Please enter your password : ";
		cin >> password;
		
		ifstream inFile;
		inFile.open("patientandstaff.txt.txt");
		found = false;
		if (!inFile)
			cout << "Unable to open file" << endl;
		else 
			{
				if (userID == "staff" && password == "0006")
				{
					cout << " Welcome Staff ! " << endl;
		
					cout<<"Please choose from the following: \n";
					cout<<"\t1. View patient's records. \n";
					cout<<"\t2. View appointments . \n";
					cout<<"\t3. Quit. \n";
					cout<<endl;

					cout<<"Your choice: ";
					cin>>choice;
	
          
					if (choice == 1)
						VIEWPATIENTSRECORD();
                  
					else if (choice == 2)
						VIEWAPPOINTMENTS();
                   
					else 
						cout<<"\tBYE <33"<<endl;
				}
				else
				{
						cout << "Welcome Patient!" << endl;
						cout << "-------Welcome-------" << endl;
						cout << " \t1Add bookings  " << endl;
						cout << " \t2Calculate BMI  " << endl;
						cout << " \t3View your own data  " << endl;
						cout << " \t4Exit " << endl;
						cout << endl;
						cout <<  "Your Choice : " ;
						cin >> choice;

		                if (choice == 1)
                            ADDBOOKINGS();
                  
                        else if (choice == 2)
                            CALCULATEBMI();

			            else if (choice == 3)
				            VIEWDATA();

						else 
							cout << "Bye" << endl;
				}

		

//				cout<<"\nWould you like to try again (y/n): " << endl;
//				cin>>ch; 
		}
	system("pause");
	return 0;
}




  void VIEWAPPOINTMENTS()
{

    string STRING;
	ifstream infile;
	infile.open ("BOOKINGS.txt.txt");
        while(!infile.eof()) // To get you all the lines.
        {
	        getline(infile,STRING); // Saves the line in STRING.
	        cout << STRING; // Prints our STRING.
        }
	
	infile.close();
	return ;
	
}
	
   
   void VIEWPATIENTSRECORD()
{
    ifstream input;
    input.open("textfile2.txt.txt");
	
    string firstname,
     lastname,
         contact,
         Datetime;

	bool found = false;
	string fname, lname;
	cout << "Enter first name ";
	cin >> fname;
	cout << "Enter last name ";
	cin >> lname;

		

    while(!input.eof() && !found)
	{   
		input>>firstname>>lastname>>contact>>Datetime;
		if (fname.compare(firstname) == 0 && lname.compare(lastname) == 0)
		{
			found = true;
			cout << "The other info: " << contact << "  " << Datetime << endl;
		}

	}
   

  
	if (!found)
		cout << "No match at all" << endl;
    cout<<"Reading Completed. "<<endl;
    input.close();
    return ;
}
   // STAFF OPTIONS

		
	
		
void ADDBOOKINGS()
{
    ofstream outfile;
    char firstname[20],
         lastname[20],
         contact[20],
         Datetime[20];
    
	
    outfile.open("BOOKINGS.txt.txt",ios::app);

    cout<<"Enter your First Name: ";
    cin>>firstname;
    cin.ignore();
    cout<<"Enter your Last Name: ";
    cin>>lastname;
    cin.ignore();
    cout<<"Enter your Contact: ";
    cin>>contact;
    cin.ignore();
    cout<<"Enter your Date and Time: ";
    cin>>Datetime;
    cin.ignore();
   

    outfile<<firstname<<setw(2)<<lastname<<setw(2)<<contact<<setw(2)<<Datetime<<endl;
    outfile.close();
    cout<<"Writing Completed."<<endl;
    return ;
}

void CALCULATEBMI()
	{
		double bmi,bmass,height;
		int hr,min,day,month,year;		
		cout<<"BMI Calculation"<<endl;
			cout<<"Please enter the time at which you are taking the option"<<endl;
			cout<<"(format:hr,min,day,mth,yr=20 02 06 08 2014):";
			cin>>hr;
			cin>>min;
			cin>>day;
			cin>>month;
			cin>>year;
		    cout<<"Please enter your height(in metric units,eg:1.75m):";
			cin>>height;
			cout<<"Please enter your body mass(eg:55kg):";
			cin>>bmass;
			bmi=bmass/(height*height);
			cout<<"Your bmi is:"<<bmi<<endl;
			if(bmi<18.5)
			cout<<"You are underweight."<<endl;
			else if(bmi>=18.5 && bmi <=24.9)
			cout<<"You have an acceptable body mass index."<<endl;
			else if(bmi>24.9 && bmi <=29.9)
			cout<<"You are overweight."<<endl;
			else if(bmi>29.9)
			cout<<"You are obese."<<endl;
		
		}



   void VIEWDATA()
{
    ifstream input;
    input.open("textfile2.txt.txt");
	
    string firstname,
     lastname,
         contact,
         Datetime;

	bool found = false;
	string fname, lname;
	cout << "Enter first name ";
	cin >> fname;
	cout << "Enter last name ";
	cin >> lname;

		
    
    while(!input.eof() && !found)
	{
        input>>firstname>>lastname>>contact>>Datetime;
		if (fname.compare(firstname) == 0 && lname.compare(lastname) == 0)
		{
			found = true;
			cout << "The other info: " << contact << "  " << Datetime << endl;
		}

	}

  
	if (!found)
	cout << "No match at all" << endl;
       
    
    cout<<"Reading Completed. "<<endl;
    input.close();
    return ;
}

	
		
			

		
		
	
	

[keskiverto]

1. What are the statements that you want to repeat?
2. You can break; from a loop instead of changing the continuation condition false.

[danzal]

i want to after the staff or patient finishes a function it will ask Do you want to continue y/n then the person can choose a function again .

[AbstractionAnon]

You want a do/while loop around lines 38-85.

I would strongly suggest moving lines 39-60 into a new function, e.g. do_staff_function and also moving lines 62-85 to a a new function. e.g. do_patient_function.

Your do/while loop becomes:

    do
    {  if (userID == "staff" && password == "0006")
            do_staff_function ()
        else
            do_patient_funtion (); 
        cout<<"\nWould you like to try again (y/n): " << endl;
        cin>>ch; 
    } while (ch == 'y');