In C++, you can use the std::ifstream::fail() function to check if there was a failure during file operations. However, to get more detailed error messages, you can use the std::ifstream::rdstate() function in combination with std::strerror() or std::perror().

Here's an updated version of your code with more detailed error messages:

#include <iostream> #include <fstream> #include <cstring> void open_file(std::ifstream& ifstream, const std::string& file_name) { ifstream.open(file_name); if (ifstream.fail()) { // Get the error code std::ios_base::iostate state = ifstream.rdstate(); // Check for specific error bits if (state & std::ios_base::eofbit) { std::cout << "End of file reached." << std::endl; } if (state & std::ios_base::failbit) { std::cout << "Non-fatal I/O error occurred." << std::endl; } if (state & std::ios_base::badbit) { std::cout << "Fatal I/O error occurred." << std::endl; } // Print system error message std::perror("Error: "); return; } std::cout << "File was opened successfully!" << std::endl; }

In this code, we use std::ios_base::iostate to retrieve the error state of the ifstream object. Then, we check specific error bits like std::ios_base::eofbit, std::ios_base::failbit, and std::ios_base::badbit to provide more detailed information about the failure.

The std::perror() function is used to print the system error message corresponding to the error code. This will give you additional information about what went wrong.

Remember to include the necessary headers for this code to work:

#include <iostream> #include <fstream> #include <cstring>

You can check the status of component with its status property and the errorString() method.

@mrjj

Thank you, thank you, thank you. It is always a pleasure to work with someone who knows their stuff.

I had overlooked the step of connecting FortuneServer's signal to Dialog's slot in the dialog.

I added in dialog.cpp:
connect(&server, SIGNAL(connectionMade(QString)), this, SLOT(setConnectionText(QString)) );

Once I put this in, it worked like a champ!

Marking it solved.
Thanks again.