I recently submitted an assignment that I had started using VS code and the Ubuntu WSL terminal and G++ compiler, but had to switch to Visual Studio 2019 because when I would output several strings on the same line, they would write over each other. The assignment had me read data from a file and place each element into an "ArrayList" (our self made vector class) of "Car" objects and output each cars elements to the user. We would also have to search through the list of cars to find cars of certain models and print all cars of that model. Not only could I not cout all of these elements on the same line, I could not compare elements (strings) with each other. Why would this only happen on Ubuntu? Why can't I clear the cout buffer with std::cout.flush(); or std::cout << std::flush;? Why can't I compare the elements to each other?
I have tried to flush the system in numerous ways (as I have found from other posts) such as: std::cerr, std::cout << std::flush;. The only thing that seems to work is if I use std::endl, however, I need these to be placed on the same line. I also cannot compare two strings using the == operand (or any other). Although, I can compare two int elements just fine.
Here is my (shortened) cars.data (.data was a requirement for the assignment) that held all the cars' elements that were to be stored into an "ArrayList":
1
Tesla
Model 3
Black
2
Chevrolet
Volt
Grey
3
Tesla
Model S
White
4
Nissan
Leaf
White
5
Toyota
Prius
Red
My implementation for storing each element into the "ArrayList":
ArrayList cars_list(15);
std::fstream cars;
cars.open("cars.data");
int tempID;
std::string tempIDstr;
std::string tempMake;
std::string tempModel;
std::string tempColor;
if (cars.is_open())
{
for (int i = 0; !cars.eof(); ++i)
{
std::getline(cars, tempIDstr);
tempID = std::stoi( tempIDstr );
std::getline(cars, tempMake);
std::getline(cars, tempModel);
std::getline(cars, tempColor);
Car tempCar(tempID, tempMake, tempModel, tempColor);
std::cout.flush();
std::cout << tempIDstr << " ";
std::cout.flush();
std::cout << tempMake << " ";
std::cout.flush();
std::cout << tempModel << " ";
std::cout.flush();
std::cout << tempColor << " " << std::endl;
cars_list.push_back(tempCar);
}
}
cars.close();
And a function that I have used to compare strings to search the list:
void searchByMake(ArrayList list)
{
std::string make;
std::cout << "Enter the make you would like to search: ";
std::cin >> make;
std::cin.clear();
std::cin.ignore(10000,'\n');
// Searching through the cars_list for the Make
for (int i = 0; i < list.size(); ++i)
{
Car tempCar = list.get(i);
if (make.compare(tempCar.getMake()) == 0)
{
std::cout << "ID:\t" << tempCar.getID() << "\n"
<< "Make:\t" << tempCar.getMake() << "\n"
<< "Model:\t" << tempCar.getModel() << "\n"
<< "Color:\t" << tempCar.getColor() << "\n\n";
}
}
}
The results of the first segment of code are (I noticed the spaces before each output):
Black 3
Greyvrolet
White S
Whitean
Redusta
The expected output should look like:
1 Tesla Model 3 Black
2 Chevrolet Volt Grey
3 Tesla Model S White
4 Nissan Leaf White
5 Toyota Prius Red
And whenever I try to compare strings the output returns a blank line:
Enter the make you would like to search: Tesla
Expected output would be:
Enter the make you would like to search: Tesla
id: 1
Make: Tesla
Model: Model 3
Color: Black
id: 3
Make: Tesla
Model: Model S
Color: White
My teacher mentioned that the issue may be with Ubuntu itself not being able to clear the buffer even when prompted to, but I still can't find a solution. FYI This is a passed assignment that I can no longer get credit for, this question is strictly out of curiosity and a desire to still use Ubuntu WSL as my development terminal.
