Question

Please can someone help me with making this program in JAVA implementing classes. Also, include loops and selection structures.

A mobile service provider has three different subscription packages for its customers:

Package A: For $50 per month, 5 GB data are provided. Additional data is $15 per GB.

Package B: For $65 per month, 10 data are provided. Additional data is $10 per GB.

Package C: For $75 per month unlimited data provided.

Text messaging and voice services are included in all of the company’s data packages. The MobileService Company offers a roaming and long distance call services with an additional cost. The roaming service will add $15 and the long distance call service will add $7 to the customer’smonthly estimate. Design a Mobile Service Calculator to estimate the client’s monthly payment. Write a program that calculates an estimate of the customer’s monthly bill. It should ask whichpackage the customer will purchased and their monthly data consumption. Include a 11.5 % service tax and $7.54 charge from FCC (Federal Communications Commission). Do Input Validations for plan selected by user and their monthly data consumption (GB). Allow the user to do a new monthly estimate without exit the program. In addition, the program will display the customer savings with other plans. Finally, the program recommends the best plan for the customer based on the estimate of the monthly payment and computed savings if apply.

Answer 1

Note: Could you plz go this code and let me know if u need any changes in this.Thank You
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#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main()
{
   //Declaring variables and constants
char package, ch;
double data;
char roaming, longDis;
const double SERVICE_TAX = 11.5;
const double FCC = 7.54;
double totalCharges = 0.0;
double savedb = 0, savedc = 0, saveda = 0;

/* This loop continues to execute until
   * the user enters a valid input
   */
while (true) {
   /* This while loop continues to execute
* until the user enters a valid number
*/
  
while (true) {
cout << "Enter the package name (A or B or C):";
cin >> package;
if (package == 'A' || package == 'a' || package == 'B' || package == 'b' || package == 'C' || package == 'c')
break;
else
cout << "** Invalid Choice **" << endl;
}

while (true) {
cout << "Enter monthly data consumption :";
cin >> data;
if (data < 0) {
cout << "** Invalid.Must be greater than zero **" << endl;
}
else
break;
}

switch (package) {
case 'A':
case 'a': {
if (data >= 0 && data <= 5) {
totalCharges = 50;
}
else {
totalCharges = 50 + (data - 5) * 15;
}

break;
}
case 'B':
case 'b': {
if (data >= 0 && data <= 10) {
totalCharges = 65;
}
else {
totalCharges = 65 + (data - 10) * 10;
}

break;
}
case 'C':
case 'c': {
totalCharges = 75;
break;
}
}

if (package == 'A' || package == 'A') {
if (data > 6 && data <= 10) {
savedb = totalCharges - 65;
}
else {
savedb = totalCharges - (65 + (data - 10) * 10);
}

if (data > 11) {
savedc = totalCharges - 75;
}

cout << "If u choose package B you might have saved :$" << savedb << endl;
cout << "If u choose package C you might have saved :$" << savedc << endl;

if (savedb > savedc) {
cout << "The Best Package which suits to your usage is package#B" << endl;
}
else {
cout << "The Best Package which suits to your usage is package#C" << endl;
}
}
else if (package == 'B' || package == 'b') {
if (data > 11) {
savedc = totalCharges - 75;
cout << "If u choose package C you might have saved :$" << savedc << endl;
cout << "The Best Package which suits to your usage is package#C" << endl;
}

if (data <= 5) {
saveda = totalCharges - 50;
cout << "The Best Package which suits to your usage is package#A" << endl;
cout << "If u choose package A you might have saved :$" << saveda << endl;
}
}
else {
if (data >= 6 && data < 11) {
savedb = totalCharges - 65;
cout << "If u choose package B you might have saved :$" << savedb << endl;
cout << "The Best Package which suits to your usage is package#B" << endl;
}
else if (data < 6) {
savedc = totalCharges - 50;
cout << "If u choose package C you might have saved :$" << savedc << endl;
cout << "The Best Package which suits to your usage is package#A" << endl;
}
}

while (true) {
cout << "Do you want roaming service (y/n):";
cin >> roaming;
if (roaming == 'y' || roaming == 'Y') {
totalCharges += 15;

break;
}
else if (roaming == 'n' || roaming == 'N') {
break;
}
else {

cout << "*Invalid choice*" << endl;
continue;
}
}

while (true) {
cout << "Do you want long distance call service (y/n):";
cin >> longDis;
if (longDis == 'y' || longDis == 'Y') {
totalCharges += 7;
break;
}
else if (longDis == 'n' || longDis == 'N') {
break;
}
else {

cout << "*Invalid choice*" << endl;
continue;
}
}

cout << "Total Charges :$" << totalCharges << endl;
cout << endl;
cout << "\nDo you Want to do new monthly estimate(Y/N):";
cin >> ch;

if (ch == 'y' || ch == 'Y') {
totalCharges = 0.0;
saveda = 0.0;
savedb = 0.0;
savedc = 0.0;

continue;
}
else {
break;
}
}

return 0;
}
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Output:

_______________Could you plz rate me well.Thank You