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authorJesse Luehrs <doy@tozt.net>2014-07-02 02:54:21 -0400
committerJesse Luehrs <doy@tozt.net>2014-07-02 02:54:21 -0400
commite620daf3b1a40ae825c625bc4328fb7d2b3ee8b6 (patch)
treefaa469408ee78623eaa8d2720dcbb36096788ca1 /examples/02_sample.rs
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+fn main() {
+ // A simple integer calculator:
+ // `+` or `-` means add or subtract by 1
+ // `*` or `/` means multiply or divide by 2
+
+ let program = "+ + * - /";
+ let mut accumulator = 0i;
+
+ for token in program.chars() {
+ match token {
+ '+' => accumulator += 1,
+ '-' => accumulator -= 1,
+ '*' => accumulator *= 2,
+ '/' => accumulator /= 2,
+ _ => { /* ignore everything else */ }
+ }
+ }
+
+ println!("The program \"{}\" calculates the value {}",
+ program, accumulator);
+}
+