Cargo，方便您更輕鬆做習題。在最後一天，我們會做規模較大的習題，讓您瞭解如何使用 依附元件，而這需要使用 Cargo。 本課程的程式碼區塊皆完全為互動式： fn main() { println!("Edit me!"); } You can use Ctrl + Enter to execute the code when focus is in the text box. 大部分程式碼範例都可供 手冊中的指示操作。您應會 獲得正常運作的 rustc 和 cargo。截至本文撰寫時間，最新的 Rust 穩定版具有下列版本編號： % rustc --version rustc 1.69.0 (84c898d65 2023-04-16) % cargo --version cargo 1.69.0 (6e9a83356 2023-04-12) 由於 Rust 保有回溯相容性，您也可以使用任何後續版本。 4. 將 src/main.rs 中的樣板程式碼替換為自己的程式碼。以上一頁的範例為例，替換後的 src/main.rs 會類似如下： fn main() { println!("Edit me!"); } 5. 使用 cargo run 建構並執行更新版二進位檔： $ cargo run Compiling exercise v0.1.0 (/home/mgeisler/tmp/exercise)

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 3.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 3.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

|\__'_|_|_|\__'_| | Commit 925d504ade4 (1 day old master) |__/ | julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit() Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"

| julia> 1 + 2 3 julia> ans 3 To exit the interactive session, type CTRL-D (press the Control/^ key together with the d key), or type exit(). When run in interactive mode, julia displays a banner Nd/No), as well as other Unicode code points: diacritics and other modifying marks (categories Mn/Mc/Me/Sk), some punctuation connectors (category Pc), primes, and a few other characters. Operators like operator ⋅ (U+22C5). The minus sign − (U+2212) is treated as equivalent to the hyphen-minus sign - (U+002D). 4.2 Assignment expressions and assignment versus mutation An assignment variable = value "binds"