コンパイルエラー

   Compiling Rust v0.1.0 (/judge/rust_workspace)
error[E0601]: `main` function not found in crate `Rust`
  |
  = note: consider adding a `main` function to `src/main.rs`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0601`.
error: could not compile `Rust`

To learn more, run the command again with --verbose.