Back in 2nd year CS we were tasked with making a simple terminal minesweeper game. It would print the whole board state after each move and read coords from std

Back in 2nd year CS we were tasked with making a simple terminal minesweeper game. It would print the whole board state after each move and read coords from stdin to know what square was picked. I wanted to make it a proper GUI-style board with arrow key movement, randomised mines (the assignment tasked us with reading mine locations from stdin at the start), auto-expanding zeros, varying board sizes...so I did. However, I knew the assignment would be marked on automated test results. I wanted to show off, but still pass the auto-tests. So I made it ask for game "mode" at the start, implementing both the requested behavior and my desired behavior. But if stdin wasn't a tty, it just did the requested behaviour without asking, thus foiling the tests.