I need help with a C++ car program. The instructions are: Write a simple program

Question

I need help with a C++ car program.

The instructions are:

Write a simple program that contains the following features:

1. function main calls functions class Car containing the public method API; API calls the private methods: simulator_input, run_simulator.

2. Use a local variable myCar defined as a struct data_car declared in the method API. This struct contains: vehicle_name, terrain, speed, tank_level.

3. Method simulator_input: Ask how TOUGH the terrain is (1:easy, 2:tough, 3:really hard). Do it in a method named simulator_input. Select the average speed to drive(a:slow = minus 3%, b:medium = minus 6%, c:fast = minus 8%). Select tank level for the fuel when you start to drive (100.0; 80.00; or 50.00)

4. Use pointers to access the input values provided by the user. Print on every loop iteration the fuel level.

5. Call the method run_simulator. Inside it, put your parameters to run inside a loop that keeps running for as long as your vehicle has fuel. Every time the loop foes through, the rule applies to the tank level: tank_level = tank_level - (TOUGH * average_speed)

Explanation / Answer

#include<string>
#include<iostream>

using namespace std;

class Car {
public:
   Car();
   ~Car();
   void API();
   struct data_car {
       string vehicle_name = "";
       int terrain = 0;
       double speed = 0.0;
       double tank_level = 0.0;
   }myCar;
private:
   void simulator_ch(data_car*);
   void run_simulator(data_car*);
};

Car::Car()
{
   API();
}

Car::~Car()
{
}

void Car::API()
{
   simulator_ch(&myCar);
   run_simulator(&myCar);
}

void Car::simulator_ch(data_car* myCar)
{

   cout << "How TOUGH is the terrain?? (1:easy, 2:tough, 3:really hard)";
   while (myCar->terrain != 1 && myCar->terrain != 2 && myCar->terrain != 3) {
       try {
           cin >> myCar->terrain;
       }
       catch (exception e)
       {
           cout << "Invalid terrain!" << endl;
       }
       if (myCar->terrain != 1 && myCar->terrain != 2 && myCar->terrain != 3) {
           cout << "Please enter a valid terrain toughness";
       }
   }

   cout << "Select the average speed to drive (1: slow, 2: medium, 3: fast)";
   int ch;
   while (ch != 1 && ch != 2 && ch != 3) {
       try {
           cin >> ch;
       }
       catch (exception e) {
           cout << "Invalid speed!" << endl;
       }
       if (ch != 1 && ch != 2 && ch != 3) {
           cout << "That's not an allowed speed setting, try another! ";
       }
   }
   switch (ch) {
   case 1:
       myCar->speed = 0.3;
       break;
   case 2:
       myCar->speed = 0.6;
       break;
   case 3:
       myCar->speed = 0.8;
       break;
   }

   cout << "Select tank level for the fuel when you start to drive (1: 100%, 2. 80%, 3. 50%) ";
   int i;
   while (i != 1 && i != 2 && i != 3) {
       try {
           cin >> i;
       }
       catch (exception e) {
           cout << "Invalid fuel amount" << endl;
       }
       if (i != 1 && i != 2 && i != 3) {
           cout << "Please enter a valid fuel amount";
       }
   }
   switch (i) {
   case 1:
       myCar->tank_level = 100.0;
       break;
   case 2:
       myCar->tank_level = 80.0;
       break;
   case 3:
       myCar->tank_level = 50.0;
       break;
   }
}

void Car::run_simulator(data_car* myCar)
{
   while (myCar->tank_level > 0.1) {
       cout << "New tank level: " << myCar->tank_level << endl;
       myCar->tank_level = myCar->tank_level - (myCar->terrain*myCar->speed );
   }
}

int main() {
   Car car;
   return 0;
  
}

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