Cin user option to variable.

[Laura Wilkinson]

Hi,

I was just wondering if you could help me. I would like the user to select "Y" or "N" as to whether their motorbike has a sidecar and then store this answer into the variable.

Could you please help me adapt this;

 
cout << "Sidecar (Y/N): ";
motorbikeSideCar=getche();  
 
if (toupper(motorbikeSideCar) == 'Y')  
{
cin >> "Yes" >> endl;  
}
 
else if (toupper(motorbikeSideCar) == 'N')  
{
cin >> "No" >> endl;  
}
 

Thanks in advance!

[horace1]

you were using cin >> where it should be cout << , should it be?

 
cout << "Sidecar (Y/N): ";
motorbikeSideCar=getche();  
 
if (toupper(motorbikeSideCar) == 'Y')  
{
cout << "Yes" << endl;  
}
 
else if (toupper(motorbikeSideCar) == 'N')  
{
cout << "No" << endl;  
}
 
 

[Laura Wilkinson]

When the user inputs "Y" or "N" I need the answer to be stored in the variable "motorbikeSideCar".

 
motorbikeSideCar=getche();  
 
 

But I also would like the answer to be displayed;

 
cout << "Yes" << endl;   
 
 

But I'm not sure if this is correct?

[horace1]

yes, the code in my post would work.
However, it is advised not to use getche() as it is none standard.
Also you don't need the second if, you can assume if the answer is not Y or y it is no, e.g.

char motorbikeSideCar;
cout << "Sidecar (Y/N): ";
if (cin >> motorbikeSideCar, toupper(motorbikeSideCar) == 'Y')
    cout << "Yes" << endl;
else
    cout << "No" << endl;

[Laura Wilkinson]

Thank you! This is very helpful :)

I was also wondering whether you could help me with something else. The system I am making I want the user to firstly chose a vehicle they would like to enter details about.

 
void vehicleMenu()
{
    int myVehicle = 0;
 
    cout << "Please Chose a Vehicle: " << endl;
    cout << "\tOption 1: Car" << endl;
    cout << "\tOption 2: Bus" << endl;
    cout << "\tOption 3: Lorry" << endl;
    cout << "\tOption 4: Motorbike" << endl;
    cout << "\tOption 5: Quit the program" << endl;
    cout << "Option: ";
    cin >> myVehicle;
 
    if (myVehicle == 1)
        fileReader();
}
 

I have not completed the code, but I am unsure of how to get the vehicle sections to open seperatley. For example, the user can enter details about a car, bus, motorbike or lorry, which is where the cin/cout code comes into play.

Thanks in advance!

[weaknessforcats]

This is done several ways but the easiest way to start is to use a switch:

switch (choice)
{
   case 1:
     Car();  //do car stuff here
     break;
   case 2: 
     Bus();   /do bus stuff here
     break;
etc...
}

You can use the default case to display a message that you have made an invalid choice.

All you need do is have the switch inside a loop that gets a choice on each cyle.

[Laura Wilkinson]

I've used cases in my main cpp file to display details already present;

 
switch (tags[i])
        {
            case 'C': displayC((CarC*) vehicles[i]); break;
            case 'B': displayB((BusB*) vehicles[i]); break;
            case 'L': displayL((LorryL*) vehicles[i]); break;
            case 'M': displayM((MotorbikeM*) vehicles[i]); break;
            default: cout << "error with tag " << endl;break;
         }
    }
    return 0;
}
 
void displayC(CarC* cPtr)
{
    cout << "Car: " <<  cPtr->carRegistration << endl;
    cout << "Owner: " << cPtr->carOwner << endl;
    cout << "Address: " << cPtr->carOwnerAddress << endl;
    cout << "Manufacturer: " << cPtr->carManufacturer << endl;
    cout << "Model: " << cPtr->carModel << endl;
    cout << "Number of Doors: " << cPtr->numCarDoors << endl;
    cout << "Number of Seats: " << cPtr->numCarSeats << endl;
    cout << "Car Type: " << cPtr->carType << endl;
    cout << "Other Information: " << cPtr->carInformation << endl;
}
 
 

I'm guessing it would be similar?

[weaknessforcats]

Yep. Looks like it to me.

Later on you will learn how polymorphism can avoid that nasty cast you do with vehicles[i].

[Laura Wilkinson]

Just looked up "polymorphism". Thanks for the help!