Answer to Question #172404 in C++ for Panjumin

Question

Design a class TBills to include customer_id, customer_name, phone number, calls and usagecost and also include the following member functions

-getCustomerData()- To input customer data(customer_id, customer_name, phone number,calls)

-usage_cost() - to calculate the monthly telephone bills and calculate the usage cost of telephone bill as per the following rule:

• Minimum Rs. 200 for upto 100 calls.

• Plus Rs. 0.60 per call for next 50 calls.

• Plus Rs. 0.50 per call for next 50 calls.

• Plus Rs. 0.40 per call for any call beyond 200 calls.

-monthlyTelephoneBills() - to display monthly telephone bills of customer

Answer 1

#include <iostream>
#include <string>
using namespace std;
class TBills{
private:
	//include customer_id, customer_name, phone, number calls
	int customer_id;
	string customer_name;
	string phone;
	int calls;
public:
	// and usagecost and also include the following member functions
	//getCustomerData()- To input customer data(customer_id, customer_name, phone number,calls)
	void getCustomerData(){
		cout<<"Enter the customer id: ";
		cin>>customer_id;
		cout<<"Enter the customer name: ";
		getline(cin,customer_name);
		getline(cin,customer_name);
		cout<<"Enter the customer phone: ";
		getline(cin,phone);
		cout<<"Enter the number of calls: ";
		cin>>calls;
	}
	//-usage_cost() - to calculate the monthly telephone bills and 
	// calculate the usage cost of telephone bill as per the following rule:
	// - Minimum Rs. 200 for upto 100 calls. 200
	// - Plus Rs. 0.60 per call for next 50 calls. 30
	// - Plus Rs. 0.50 per call for next 50 calls. 25
	// - Plus Rs. 0.40 per call for any call beyond 200 calls. 184
	double usage_cost(){
		double monthlyTelephoneBills=200;
		int nCalls=calls;
		if(nCalls>100){
			nCalls-=100;
			if((nCalls-50)>=0){
				monthlyTelephoneBills+=50*0.60;
				nCalls-=50;
			}else{
				monthlyTelephoneBills+=nCalls*0.60;
				nCalls=0;
			}
			if((nCalls-50)>=0){
				monthlyTelephoneBills+=50*0.50;
				nCalls-=50;
			}else{
				monthlyTelephoneBills+=nCalls*0.50;
				nCalls=0;
			}
		}else{
			nCalls=0;
		}
		if(nCalls>0){
			monthlyTelephoneBills+=nCalls*0.40;
		}
		return monthlyTelephoneBills;
	}
	//-monthlyTelephoneBills() - to display monthly telephone bills of customer
	void monthlyTelephoneBills(){
		cout<<"\nThe customer id: "<<customer_id<<"\n";
		cout<<"The customer name: "<<customer_name<<"\n";
		cout<<"The customer phone: "<<phone<<"\n";
		cout<<"The number of calls: "<<calls<<"\n\n";
		cout<<"The monthly telephone bills of customer is "<<usage_cost()<<"\n\n";
	}
};

//The start point of the program
int main (){
	TBills Tbills;
	Tbills.getCustomerData();
	Tbills.monthlyTelephoneBills();
	//delay
	system("pause");
	return 0;
}