VS Code 疑難雜症

unresolved import 'xyz'

VS code 出現警示

1. 修改 Cargo.toml
2. 增加相關所需的 dependencies

[dependencies]
rand="0.8.5"

compile 時出錯的話

1. install Code Runner extension
2. 點齒輪 > Extension Settings > Executor Map setting
3. link 'Edit in settings.json
4. 下列修改..... 無效(因為原本便是用 cargo run)

from :
"code-runner.executorMap": {
    "rust": "cd $dir && rustc $fileName && $dir$fileNameWithoutExt",
}

to:
"code-runner.executorMap": { "rust": "cargo run # $fileName", }

use of undeclared crate or module