help on a program
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Thread: help on a program

  1. #1
    Join Date
    Feb 2011
    Posts
    2

    help on a program

    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!

    Code:
    #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;
     	}
     }
    Last edited by Marc G; February 17th, 2011 at 08:58 AM. Reason: Added code tags

  2. #2
    Join Date
    Feb 2011
    Posts
    2

    Re: help on a program

    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!

  3. #3
    Join Date
    Sep 2004
    Location
    Holland (land of the dope)
    Posts
    4,123

    Re: help on a program

    Welcome to codeguru.

    Please use code tags for posting code.

    Your file won't open like this...
    Code:
    ifstream inFile("E:\C++ Project1\mini project\charges.txt");
    needs to be
    Code:
    ifstream inFile("E:\\C++ Project1\\mini project\\charges.txt");

  4. #4
    VictorN's Avatar
    VictorN is offline Super Moderator Power Poster
    Join Date
    Jan 2003
    Location
    Wallisellen (ZH), Switzerland
    Posts
    17,291

    Re: help on a program

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

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