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Book Rust by Example ⬆

Rust project This repository gathers Rust code examples from the online book "Rust by Example" (RBE).
It also includes several batch files for experimenting with Rust on a Windows machine.

01_Display Example

This example has the following directory structure :

> tree /a /f . | findstr /v /b [A-Z]
|   build.bat
|   Cargo.toml
|   rustfmt.toml
\---src
        main.rs

Command cargo run executes the Rust program main.rs :

> cargo clean & cargo run
   Compiling _01_Display v1.0.0 (R:\rust-by-example\01_Display)
    Finished dev [unoptimized + debuginfo] target(s) in 2.81s
     Running `target\debug\main.exe`
Compare structures:
Display: (0, 14)
Debug: MinMax(0, 14)
The big range is (-300, 300) and the small is (-3, 3)
Compare points:
Display: x: 3.3, y: 7.2
Debug: Point2D { x: 3.3, y: 7.2 }

01_Formatting Example

This example has the following directory structure :

> tree /a /f . | findstr /v /b [A-Z]
|   build.bat
|   Cargo.toml
\---src
        main.rs

Command build run executes the Rust program main.rs :

> build -verbose clean run
Compile 1 Rust source file to directory "target"
Dublin: 53.348°N 6.260°W
Oslo: 59.950°N 10.750°E
Vancouver: 49.250°N 123.100°W
Color { red: 128, green: 255, blue: 90 }
Color { red: 0, green: 3, blue: 254 }
Color { red: 0, green: 0, blue: 0 }

01_HelloWorld Example

This example has the following directory structure :

> tree /a /f . | findstr /v /b [A-Z]
|   build.bat
|   Cargo.toml
\---src
        main.rs

Command build run executes the Rust program main.rs :

> build -verbose clean run
Delete directory "target"
Compile 1 Rust source files to directory "target"
Hello World!

Command cargo run executes the Rust program main.rs :

> cargo clean & cargo run
     Removed 0 files
   Compiling _01_HelloWorld v1.0.0 (L:\rust-by-example\01_HelloWorld)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
     Running `target\debug\main.exe`
Hello World!

02_Literals Example ▴

This example has the following directory structure :

> tree /a /f . | findstr /v /b [A-Z]
|   build.bat
|   Cargo.toml
\---src
        main.rs

Command cargo run executes the Rust program main.rs :

> cargo clean && cargo run
   Compiling _02_Primitives v1.0.0 (R:\rust-by-example\02_Literals)
    Finished dev [unoptimized + debuginfo] target(s) in 2.53s
     Running `target\debug\main.exe`
1 + 2 = 3
1 - 2 = -1
true AND false is false
true OR false is true
NOT true is false
0011 AND 0101 is 0001
0011 OR 0101 is 0111
0011 XOR 0101 is 0110
1 << 5 is 32
0x80 >> 2 is 0x20
One million is written as 1000000

02_Primitives Example

> tree /a /f . | findstr /v /b [A-Z]
|   build.bat
|   Cargo.toml
\---src
        main.rs

Command build run executes the Rust program main.rs :

> build -verbose clean run
Compile 1 Rust source files to directory "target"
[...]
warning: value assigned to `mutable` is never read
  --> R:\rust-by-example\02_Primitives\src\main.rs:27:5
   |
27 |     mutable = true as i32;
   |     ^^^^^^^
   |
   = help: maybe it is overwritten before being read?

warning: 4 warnings emitted

inferred_type: 4294967296
mutable: true

mics/January 2025 ▲