Here is a list of all functions with links to the files they belong to:

• create_data() : train.cpp
• download_file() : mnist.cpp
• fetch_mnist() : mnist.cpp
• file_exists() : mnist.cpp
• main() : main.cpp, train.cpp
• read_mnist_images() : mnist.cpp
• read_mnist_labels() : mnist.cpp
• TEST_F() : test_loss.cpp, test_optimizer.cpp, test_metrics.cpp, test_loss.cpp, test_activation.cpp, test_loss.cpp, test_dense.cpp, test_activation.cpp
• unzip_file() : mnist.cpp