careers_assignment.cpp

#include <iostream>
#include <iomanip>

using namespace std;

int years;
double initial_amount, amount_to_add, rate;

double calculate(double prev, int count, int years) {
  return (years == count)
             ? prev
             : calculate(prev * rate + amount_to_add, ++count, years);
}

int main() {
  cout << "Enter the rate: ";
  cin >> rate;

  cout << "Enter how many years to invest: ";
  cin >> years;

  cout << "Enter the initial amount you start with: ";
  cin >> initial_amount;

  cout << "Enter the amount you add each year: ";
  cin >> amount_to_add;

  double result{calculate(initial_amount, 1, years)};
  
  cout << fixed << setprecision(2) << "Total amount: $" << result << endl;
}