Question

The utility department of Brentwood City needs you to write a C++ program that will print out a customer's bill. The program should input the following items from the file named "utility.txt" (which you may copy from the class data share or Blackboard): The customer number (6-digit integer) The number of gallons of water used (floating-point, no more than 999.99) The number of kilowatts of electricity used (integer, no more than 999) The number of cubic feet of natural gas (floating-point, no more than 999.99) You may assume that all information is complete and in the correct format. Brentwood charges the following: $0.02 per gallon of water $0.24 per kilowatt of electricity $0.39 per cubic foot of gas Your program should display (to common output) a simple bill showing the four items that were input, the cost for each unit of each utility, the charge for each utility's usage, and the grand total of all utility charges. For example, it might look something like: Be sure the format of your bill is neat, well-organized, and easy to read. The costs in the right-hand column, along with the grand total, should all be rounded to two decimal places and have decimal points that would always line up.

Answer 1

utility.txt(Save the text file in D:Drive .Then the path of the file is D:\\utility.txt )

222123
955.9
576
715.8

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Code in c++

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

int main() {
//Declaring constant  
const char* filename = "D:\\utility.txt";
  
//Declaring variables
long cust_number,cnum;
float gallons_water,gwater;
int electricity_kw,electricity;
float natural_gas_cf,gas;
float const WATER=0.02,ELEC=0.24,GAS=0.39;

//Input stream
std::ifstream inFile(filename);

//Check whether the file is available or not.
if(!inFile) {
cout << endl << "Failed to open file " << filename;
return 1;
}
  
//If the file is available,read the values from it.
while(!inFile.eof()) {
inFile >>cnum>>gwater>>electricity>>gas;
cust_number=cnum;
gallons_water=gwater;
electricity_kw=electricity;
natural_gas_cf=gas;
  
//calculating the cost
float cost_of_water=gallons_water*WATER;
float cost_of_electricity=electricity_kw*ELEC;
float cost_of_gas=natural_gas_cf*GAS;
  
//calculating the total Cost.
float total_charges=cost_of_water+cost_of_electricity+cost_of_gas;
  
//Displaying the Bill.
cout << std::setw(36) << "Brentwood City Utility Bill"<<setw(16)<<"Customer #"<<cust_number<<endl<<"\n";
cout<<std::setw(14)<<"Water"<<setw(17)<<gallons_water<<" gallons at $"<<WATER<<"="<<setw(14)<<"$"<<setw(2)<<cost_of_water<<endl;
cout<<std::setw(20)<<"Electricity"<<setw(9)<<electricity_kw<<" Kilowatts at $"<<ELEC<<"="<<setw(14)<<"$"<<setw(2)<<cost_of_electricity<<endl;
cout<<std::setw(20)<<"Natural Gas"<<setw(11)<<natural_gas_cf<<" cubic foot at $"<<GAS<<"="<<setw(11)<<"$"<<std::fixed<< std::setprecision(2)<<setw(2)<<cost_of_gas<<endl<<"\n";
cout<<std::setw(69)<<"------------------------------------------------------------"<<endl;
cout<<std::setw(33)<<"Total of all utilities ="<<setw(30)<<"$ "<<total_charges<<endl;
}
cout << endl;
return 0;
}

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Output:

CProgram Files (x86)\Dev-Cpp MinGW64\bin\BreantWoodElectricityBill.exe Brentwood City Utility Bill Water Electricity Customer #222123 955.9 gallons at $0.02- 576 Kilowatts at S0.24 715.8 cubic foot at $0.39 $19.118 $138.24 $279.16 Natural Gas Total of all utilities $ 436.52 1.866 seconds with Process exited after Press any key to continue - - - return value