fix: readme

README.md

@@ -1,10 +1,10 @@
 # Jack VM Translator
 
-This is a VM translator made as an assignment for the [Nand To Tetris Course: Part 2](https://nand2tetris.org/project07). It assumes that the VM files do not have errors for now.
+This is a VM translator made as an assignment for the [Nand To Tetris Course: Part 2](https://nand2tetris.org/project07).
 
 ## Requirements
 
-You need a C++ compiler and `make` to develop, build, and run this project.
+You need GCC and `make` to develop, build, and run this project.
 
 ## Installation
 
@@ -38,6 +38,6 @@ make MODE=release
 
 You will find the executable in the `out/` directory.
 
-## Reference
+## Testing
 
-This project is based on the [Nand To Tetrass Course: Part 2](https://www.nand2tetris.org/).
+You can download VM files to test the translator against from the [Nand To Tetris website](https://www.nand2tetris.org/software).

src/main.cpp

@@ -13,6 +13,11 @@
 
 int process(std::string inputPath, std::string outputPath,
             std::ios_base::openmode outputStreamMode, bool &init) {
+  if (!std::filesystem::exists(inputPath)) {
+    std::cerr << "File does not exist!" << std::endl;
+    exit(1);
+  }
+
   std::ifstream ifs(inputPath);
   std::ofstream ofs(outputPath, outputStreamMode);
   std::string fileName = getFileNameFromFilePath(inputPath);