help on a program

[kyox]

this program used to work flawlessly 4 years ago but it can only run without showing anything now. i am wondering why is this so. can anyone please help shed some light on this? thanks in advance!

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

class service_provider //class name service_provided
 {
	protected : 
		double total;
		double oc,smc;

 };

class singtel:public service_provider //class name Singtel with derived class service_provider
 {

	public :
		void plan1(double, double); 
		void plan2(double, double);
		void showplan1(){cout<<"The total charges for Singtel-ione value is: $"<<total<<endl;}
		void showplan2(){cout<<"The total charges for Singtel-ione plus is: $"<<total<<endl;}
 };

 void singtel::plan1(double o, double sm)   //first service plan from Singtel
 {
	 if (o<=80)             // when outgoing call time is 80 minutes or less,its is free.
		 oc=0;
	 else
		 oc=0.1605*(o-80); // calculate outgoing charge

	total=20.33+oc+(0.0535*sm); //calculate total
	
 }
 
 void singtel::plan2(double o, double sm)    //second service plan from Singtel
 {
	 if (o<=100)            // when outgoing call is 100 minutes or less,there is no charge.
		 oc=0;
	 else
		 oc=0.1605*(o-100); // calculate outgoing charge

	 if (sm<=500)           //when sms is 500 or less,there is no charge.
		 smc=0;
	 else
		 smc=0.0535*(sm-500); //calculate sms charge
	 
	total=25.68+oc+smc; //calculate total
	
 }

 
 class starhub:public service_provider			//class named Starhub with derived class service_provider
  {
	public :
		void plan1(double, double); 
		void plan2(double, double);
		void showplan1(){cout<<"\nThe total charges for Starhub-powercall is: $"<<total<<endl;}
		void showplan2(){cout<<"The total charges for Starhub-powerplay II is: $"<<total<<endl;}
 };


 void starhub::plan1(double o, double sm)        //first service plan from Starhub
 {
	 if (o<=160)            //when outgoing call time is 160 minutes or less,there is no charge.
		 oc=0;
	 else
		 oc=0.1605*(o-160); // calculate outgoing charge when outgoing call time exceeds 160 minutes

	total=29.96+oc+(0.0535*sm); //calculate total
	
 }
 
 void starhub::plan2(double o, double sm)        //second service plan from Starhub
 {
	 if (o<=80)            //when outgoing call time is 80 minutes or less,there is no charge.
		 oc=0;
	 else
		 oc=0.1605*(o-80); // calculate outgoing charge when outgoing call time exceeds 80 minutes.

	 if (sm<=300)          // when sms is 300 or less,there is no charge.
		 smc=0;
	 else
		 smc=0.0535*(sm-300); //calculate sms charge when sms exceeds 300.
	 
	total=29.96+oc+smc; //calculate total
	
 }

 class M1:public service_provider //class named M1 with derived class service_provider
 {
	public :
		void plan1(double, double); 
		void plan2(double, double);
		void showplan1(){cout<<"\nThe total charges for M1-suntalk plus idd 80 is: $"<<total<<endl;}
		void showplan2(){cout<<"The total charges for M1-suntalk plus idd 100 is: $"<<total<<endl;}
 };


 void M1::plan1(double o, double sm)    //first service plan from M1
 {
	 if (o<=80)             //when outgoing call time is 80 minutes or less,there is no charge
		 oc=0;
	 else
		 oc=0.1605*(o-80); // calculate outgoing charge when outgoing call time exceeds 80 minutes

	 if (sm<=500)          //when sms is 500 or less,there is no charge.
		 smc=0;
	 else
		 smc=0.0535*(sm-500); //calculate sms charge if sms exceeds 500
	 
	total=21.40+oc+smc; //calculate total

 }
 
 void M1::plan2(double o, double sm)     //second service plan from M1
 {
	 if (o<=100)            //when outgoing call time is 100 minutes or less,there is no charge.
		 oc=0;
	 else
		 oc=0.1605*(o-100); // calculate outgoing charge when call exceeds 100 minutes

	 if (sm<=500)           //when sms is 500 or less,there is no charge.
		 smc=0;
	 else
		 smc=0.0535*(sm-500); //calculate sms charge when sms exceeds 500
	 
	total=25.68+oc+smc; //calculate total
	
 }
 void main()
 {
	 char ans;
	 string  str;
	ifstream inFile("E:\C++ Project1\mini project\charges.txt");       //link to the text that the program is supposed to read from.

	while (! inFile.eof())  
	{
		getline(inFile, str);
		cout<<str<<endl;
	}
	inFile.close(); 
	
	while(1)
	{
		double i,o,sm;
		cout<<"Expected no of minutes of in-coming local calls: ";
		cin>>i;
		cout<<"Expected no of minutes of out-going local calls: ";
		cin>>o;
		cout<<"Expected no of SMS: ";
		cin>>sm;
		cout<<endl;

		singtel s;
		s.plan1(o,sm);
		s.showplan1();
		s.plan2(o,sm);
		s.showplan2();

	
		starhub h;
		h.plan1(o,sm);
		h.showplan1();
		h.plan2(o,sm);
		h.showplan2();

	
	
		M1 m;
		m.plan1(o,sm);
		m.showplan1();
		m.plan2(o,sm);
		m.showplan2();



		while(1)
		{
			cout<<"\ncontinue?(y/n) : ";    //prompting the user to continue or 			not to continue with the calculation.
			cin>>ans;

				if (ans=='n'||ans=='y')
				break;
		}
	if (ans=='n')
		break;
 	}
 }

[kyox]

SORRY! this program is supposed to calculate mobile phone chargers and display them. it also has to display a file. i can't, for the life of me figure out how to edit my main post. so sorry for the double post!

[Skizmo]

Welcome to codeguru.

Please use code tags for posting code.

Your file won't open like this...

ifstream inFile("E:\C++ Project1\mini project\charges.txt");

needs to be

ifstream inFile("E:\\C++ Project1\\mini project\\charges.txt");

[VictorN]

Please, use Code tags, indentations and white spaces.
See Announcement: Before you post....