From f4c6dcf1d7c8c95bed0d7be36f27f504d8c0cb87 Mon Sep 17 00:00:00 2001 From: "Carol (Nichols || Goulding)" Date: Wed, 16 Sep 2015 20:19:24 -0400 Subject: [PATCH] Add some exercises about variables! --- README.md | 11 +++++++++++ variables/variables1.rs | 6 ++++++ variables/variables2.rs | 10 ++++++++++ variables/variables3.rs | 8 ++++++++ variables/variables4.rs | 6 ++++++ 5 files changed, 41 insertions(+) create mode 100644 variables/variables1.rs create mode 100644 variables/variables2.rs create mode 100644 variables/variables3.rs create mode 100644 variables/variables4.rs diff --git a/README.md b/README.md index fe9d6ae..b4aae2e 100644 --- a/README.md +++ b/README.md @@ -9,12 +9,23 @@ This repo is very much the smallest thing that could possibly work :) Thanks to [btbytes'](https://twitter.com/btbytes) [prlinks](https://github.com/btbytes/prlink), you can now click on the links below to load the exercises in the rust playpen!! +### Uncategorized + +A few exercises based on things I've encountered or had trouble with getting used to. + - ["ex1.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+main%28%29+%7B%0A++++println%21%28%29%3B%0A%7D%0A) - ["ex2.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+something%28%29+-%3E+String+%7B%0A++++%22hi%21%22%0A%7D%0A%0Afn+main%28%29+%7B%0A++++println%21%28%22%7B%7D%22%2C+something%28%29%29%3B%0A%7D%0A) - ["ex3.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Astruct+Foo+%7B%0A++++capacity%3A+i32%2C%0A%7D%0A%0Afn+main%28%29+%7B%0A++++println%21%28%22%7B%3A%3F%7D%22%2C+Foo+%7B+capacity%3A+3+%7D%29%3B%0A%7D%0A) - ["ex4.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+something%28%29+-%3E+Result%3Ci32%2C+std%3A%3Anum%3A%3AParseIntError%3E+%7B%0A++++let+x%3Ai32+%3D+%223%22.parse%28%29%3B%0A++++Ok%28x+*+4%29%0A%7D%0A%0Afn+main%28%29+%7B%0A++++match+something%28%29+%7B%0A++++++++Ok%28..%29+%3D%3E+println%21%28%22You+win%21%22%29%2C%0A++++++++Err%28e%29+%3D%3E+println%21%28%22Oh+no+something+went+wrong%3A+%7B%7D%22%2C+e%29%2C%0A++++%7D%0A%7D%0A) - ["ex5.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Aenum+Reaction%3C%27a%3E+%7B%0A++++Sad%28%26%27a+str%29%2C%0A++++Happy%28%26%27a+str%29%2C%0A%7D%0A%0Afn+express%28sentiment%3A+Reaction%29+%7B%0A++++match+sentiment+%7B%0A++++++++Reaction%3A%3ASad%28s%29+%3D%3E+println%21%28%22%3A%28+%7B%7D%22%2C+s%29%2C%0A++++++++Reaction%3A%3AHappy%28s%29+%3D%3E+println%21%28%22%3A%29+%7B%7D%22%2C+s%29%2C%0A++++%7D%0A%7D%0A%0Afn+main+%28%29+%7B%0A++++let+x+%3D+Reaction%3A%3AHappy%28%22It%27s+a+great+day+for+Rust%21%22%29%3B%0A++++express%28x%29%3B%0A++++express%28x%29%3B%0A++++let+y+%3D+Reaction%3A%3ASad%28%22This+code+doesn%27t+compile+yet.%22%29%3B%0A++++express%28y%29%3B%0A%7D%0A) +### Variable bindings + +- ["variables1.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+main%28%29+%7B%0A++++x+%3D+5%3B%0A++++println%21%28%22x+has+the+value+%7B%7D%22%2C+x%29%3B%0A%7D%0A) +- ["variables2.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+main%28%29+%7B%0A++++let+x%3B%0A++++if+x+%3D%3D+10+%7B%0A++++++++println%21%28%22Ten%21%22%29%3B%0A++++%7D+else+%7B%0A++++++++println%21%28%22Not+ten%21%22%29%3B%0A++++%7D%0A%7D%0A) +- ["variables3.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+main%28%29+%7B%0A++++let+x+%3D+3%3B%0A++++println%21%28%22Number+%7B%7D%22%2C+x%29%3B%0A++++x+%3D+5%3B%0A++++println%21%28%22Number+%7B%7D%22%2C+x%29%3B%0A%7D%0A) +- ["variables4.rs"](http://play.rust-lang.org/?code=%2F%2F+Make+me+compile%21%0A%0Afn+main%28%29+%7B%0A++++let+x%3A+i32%3B%0A++++println%21%28%22Number+%7B%7D%22%2C+x%29%3B%0A%7D%0A) + ## To help with this repo/TODO list * File issues for problems or suggestions! diff --git a/variables/variables1.rs b/variables/variables1.rs new file mode 100644 index 0000000..3035bfa --- /dev/null +++ b/variables/variables1.rs @@ -0,0 +1,6 @@ +// Make me compile! + +fn main() { + x = 5; + println!("x has the value {}", x); +} diff --git a/variables/variables2.rs b/variables/variables2.rs new file mode 100644 index 0000000..9368488 --- /dev/null +++ b/variables/variables2.rs @@ -0,0 +1,10 @@ +// Make me compile! + +fn main() { + let x; + if x == 10 { + println!("Ten!"); + } else { + println!("Not ten!"); + } +} diff --git a/variables/variables3.rs b/variables/variables3.rs new file mode 100644 index 0000000..cadb40b --- /dev/null +++ b/variables/variables3.rs @@ -0,0 +1,8 @@ +// Make me compile! + +fn main() { + let x = 3; + println!("Number {}", x); + x = 5; + println!("Number {}", x); +} diff --git a/variables/variables4.rs b/variables/variables4.rs new file mode 100644 index 0000000..c9a63f5 --- /dev/null +++ b/variables/variables4.rs @@ -0,0 +1,6 @@ +// Make me compile! + +fn main() { + let x: i32; + println!("Number {}", x); +}