Need help creating an equation in C++ to calculate total - c++

Question

My updated code. When I run the code it keeps outputting the prices of all the packages instead of just the one I ask for.
#include <iostream>
using namespace std;
int main() {
// to keep it simple
int choice_a = 995;
int choice_b = 1995;
int choice_c = 3995;
char choice;
int message_units, x=1;
double price;
bool selected = false;
// this loop shows the options initially
do {
cout << "Which package do you choose (enter A, B or C)" << endl;
// you will need to check this
cin >> choice;
// keeping it simple
if (choice == 'A') { price = choice_a; selected = true; }
else if (choice == 'B') { price = choice_b; selected = true; }
else if (choice == 'C') { price = choice_c; selected = true; }
cout << endl;
}
// loops until something was selected
while (selected == false);
do{
cout << "How many message units (enter 1 - 672)" << endl;
// again check this
cin >> message_units;
x++;
}
while(x<2);
if(message_units > 5){
choice_a += 100 * (message_units - 5);
}
cout << "Your total cost is " << choice_a /100 << "." <<choice_a%100 endl
if(message_units > 15){
choice_b += 50 * (message_units - 15);
}
cout <<"Yourtotalcostis"<<choice_b /100 << "." << choice_b%100<<endl;

Answer 1

(You missed an "i" or two, but English is difficult for a non-native speaker.)
Atotalcost = 9.95;
if(messageunits>5)
Atotalcost += 1.0 * (messageunits-5);
EDIT:
There are several ways to deal with amounts of money. One of them is to store an amount as a number of cents, then print it out with care. For example, the amount $2.34 is stored as int price = 234, then to print it out we print price/100 (which is 2), then a decimal point, then price%100 (which is 34, the '%' is the modulo operator, you can look it up). So the code will look like this:
#include <iostream>
using namespace std;
int main()
{
int messageunits;
cout << "how many message units(enter 1 - 672)" << endl;
cin >> messageunits;
int Atotalcost = 995; // cost of package a, in cents
if(messageunits > 5){
Atotalcost += 100 * (messageunits - 5);
}
cout << "Your total cost is " << Atotalcost/100 << "." << Atotalcost%100 << endl;
}
There is still much work to do, but this is a good start.

Answer 2

Along those lines, this example may have a few minor errors and I tried to keep it simple.
#include <iostream>
using namespace std;
int main() {
bool finished = false;
do {
// to keep it simple
double choice_a = 9.95;
double choice_b = 19.95;
double choice_c = 39.95;
char choice;
int message_units;
double price;
bool selected = false;
// this loop shows the options initially
do {
cout << "Which package do you choose (enter A, B or C)" << endl;
// you will need to check this
cin >> choice
// keeping it simple
if (choice == 'A') { price = choice_a; selected = true; }
else if (choice == 'B') { price = choice_b; selected = true; }
else if (choice == 'C') { price = choice_c; selected = true; }
cout << endl;
}
// loops until something was selected
while (selected == false);
// user enters how many units is wanted
cout << "How many message units (enter 1 - 999)" << endl;
// again check this (if homework requires checking input)
cin >> message_units;
// Calculating message units
if (message_units > 5) price += message_units * 1;
else price += message_units * 2; // if $2.00 normal?
// Total Price Output
cout << "Total: " << price << endl;
// Is user done?
char done;
cout << "Do you want to enter another? press enter to continue. If you are done, type something and press enter.";
cin >> done;
// check
if (done != '') {
finished = true;
}
}
while (finished = false);
Alright, that is about it. Two do while loops and the rest. There may be some slight errors while compiling, really, you should try to fix those yourself as this is pretty much the entire assignment...