tetris-cpp

A simple Tetris game implemented in C++ for the Windows console.

Features

• Classic Tetris gameplay
• Colored blocks in console
• Shadow system (shows where the piece will land)
• Keyboard controls for moving, rotating, and dropping pieces
• Score system and levels

Requirements

• Windows OS
• g++ (MinGW) or MSVC compiler
• Console with ANSI/Windows API support

Build

• Compile with g++: g++ -std=c++11 tetris.cpp -o tetris
• Run: tetris.exe

Controls

• a → Move Left
• d → Move Right
• s → Move Down (fast)
• x → Hard Drop (instantly drop piece)
• e → Rotate Clockwise
• q → Rotate Counter-Clockwise

Demo of Tetris

Known Issues / Limitations

• Uses many global variables, making code harder to maintain.
• Works only on Windows (conio.h, windows.h, Sleep, Beep).
• Uses system("cls") which is not safe or portable.
• Shadow block is not clearly visible (same character as empty space).
• Random number generator is reseeded (srand) multiple times instead of once.
• Functions canGoDown, canGoLeft, canGoRight have duplicated logic.
• Rotation logic is simplistic and may fail for some tetromino shapes.
• Whole code is in one file (no modularization with classes).

Future Improvements

• Refactor code to use classes (Board, Piece, Game) instead of global variables.
• Make the game cross-platform (Linux, macOS).
• Replace system("cls") with proper screen handling.
• Improve rotation system (e.g., SRS like in modern Tetris).
• Add unit tests for core functions.
• Add music or better sound handling.
• Add high score system and save progress.

License

This project is licensed under the MIT License.