interaction.h File Reference

User interaction functions. More...

#include <string>

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Functions
std::string	SelectInputFile ()
	Allows the user to select an input .in file from the current directory.Returns an empty string if no file is selected.
char	AskRunAgain ()
	Return char The user's choice ('y', 'Y', 'n', 'N').
void	WaitForExit ()
	Waits for the user to press Enter before exiting.

Detailed Description

User interaction functions.

Author

Gilbert Young

Date

2024/09/25

Definition in file interaction.h.

Function Documentation

AskRunAgain()

char AskRunAgain

(

)

Return char The user's choice ('y', 'Y', 'n', 'N').

Definition at line 82 of file interaction.cpp.

{
    char choice;
    while (true)
    {
        cout << "\nDo you want to run the program again? (y/n): ";
        cin >> choice;
 
        if (choice == 'y' || choice == 'Y' || choice == 'n' || choice == 'N')
        {
            break;
        }
        else
        {
            cout << "Invalid input. Please enter 'y' or 'n'." << endl;
        }
    }
    return choice;
}

SelectInputFile()

std::string SelectInputFile

(

)

Allows the user to select an input .in file from the current directory.Returns an empty string if no file is selected.

Definition at line 24 of file interaction.cpp.

{
    vector<string> in_files;
    for (const auto &entry : filesystem::directory_iterator(filesystem::current_path()))
    {
        if (entry.is_regular_file())
        {
            string filename = entry.path().filename().string();
            if (filename.size() >= 3 && filename.substr(filename.size() - 3) == ".in")
            {
                in_files.push_back(filename);
            }
        }
    }
 
    string selected_file;
    if (in_files.empty())
    {
        cout << "No .in files found in the current directory." << endl;
        return "";
    }
    else if (in_files.size() == 1)
    {
        selected_file = in_files[0];
        cout << "Found one .in file: " << selected_file << ". Automatically selecting it." << endl;
    }
    else
    {
        cout << "Multiple .in files found. Please select one:" << endl;
        for (size_t i = 0; i < in_files.size(); i++)
        {
            cout << i + 1 << ". " << in_files[i] << endl;
        }
        int file_choice;
        // Improved input validation
        while (true)
        {
            cout << "Enter the number of the file you want to use (1-" << in_files.size() << "): ";
            cin >> file_choice;
 
            if (cin.fail() || file_choice < 1 || file_choice > static_cast<int>(in_files.size()))
            {
                cin.clear();                                         // Clear error flags
                cin.ignore(numeric_limits<streamsize>::max(), '\n'); // Clear input buffer
                cout << "Invalid input. Please enter a number between 1 and " << in_files.size() << "." << endl;
            }
            else
            {
                break;
            }
        }
        selected_file = in_files[file_choice - 1];
    }
    cout << endl;
    return selected_file;
}

WaitForExit()

void WaitForExit

(

)

Waits for the user to press Enter before exiting.

Definition at line 103 of file interaction.cpp.

{
    cout << "\nPress Enter to exit...";
    cin.ignore(numeric_limits<streamsize>::max(), '\n'); // Clear input buffer
    cin.get();                                           // Wait for Enter key
}