添加rand =＆＃34; 0.3.0＆＃34;在Cargo.toml文件中

Question

我正在尝试Rust猜谜游戏

我的Cargo.toml：

[package]
name = "guessing_game"
version = "0.1.0"
authors = ["grv07"]
[dependencies]
rand = "0.3.0"

现在，当我运行cargo build时，它仍然停留在：

Updating registry `https://github.com/rust-lang/crates.io-index`