Initial commit with a few examples from the website

This commit is contained in:
2020-06-08 23:53:04 -04:00
commit d298143303
4 changed files with 108 additions and 0 deletions

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.gitignore vendored Normal file
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#vscode
.vscode/
#Ignore all executables
*.exe

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// Derive the `fmt::Debug` implementation for `Structure`. `Structure`
// is a structure which contains a single `i32`.
#[derive(Debug)]
struct Structure(i32);
// Put a `Structure` inside of the structure `Deep`. Make it printable
// also.
#[derive(Debug)]
struct Deep(Structure);
#[derive(Debug)]
struct Person<'a>{
name: &'a str,
age: u8
}
fn main(){
//Printing with `{:?}` is similar to with `{}`.
println!("{:?} months in a year.", 12);
println!("{1:?} {0:?} is the {actor:?} name.",
"Slater",
"Christian",
actor="actor's");
//`Structure` is printable!
println!("Now {:?} will print!", Structure(3));
//The problem with `derive` is there is no control over how
//the results look. What if I want this to just show a `7`?
println!("Now {:?} will print!", Deep(Structure(7)));
let name = "Peter";
let age = 27;
let peter = Person { name, age };
//Pretty print
println!("{:#?}", peter);
}

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//Tutorials/hello.rs
//Matthew Ellison
// Created: 06-06-20
//Modified: 06-06-20
//This is a hello world program for rust
fn main(){
// In general, the `{}` will be automatically replaced with any
// arguments. These will be stringified.
println!("{} days", 31);
// Without a suffix, 31 becomes an i32. You can change what type 31 is
// by providing a suffix. The number 31i64 for example has the type i64.
// There are various optional patterns this works with. Positional
// arguments can be used.
println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
// As can named arguments.
println!("{subject} {verb} {object}",
object="the lazy dog",
subject="the quick brown fox",
verb="jumps over");
// Special formatting can be specified after a `:`.
println!("{} of {:b} people know binary, the other half doesn't", 1, 2);
// You can right-align text with a specified width. This will output
// " 1". 5 white spaces and a "1".
println!("{number:>width$}", number=1, width=6);
// You can pad numbers with extra zeroes. This will output "000001".
println!("{number:>0width$}", number=1, width=6);
// Rust even checks to make sure the correct number of arguments are
// used.
println!("My name is {0}, {1} {0}", "Bond", "James");
// Create a structure named `Structure` which contains an `i32`.
#[allow(dead_code)]
struct Structure(i32);
// However, custom types such as this structure require more complicated
// handling. This will not work.
//println!("This struct `{}` won't print...", Structure(3));
// FIXME ^ Comment out this line.
//This prints out PI to 3 digits past the decimal
println!("PI is roughly {PI:.3}", PI=3.14159);
}

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//Tutorials/hello.rs
//Matthew Ellison
// Created: 06-06-20
//Modified: 06-06-20
//This is a hello world program for rust
fn main(){
//Basic printing
println!("Hello World");
let x = 5;
println!("'x' = {}", x);
}