Started Rust in Action MEAP.

1 files changed, 36 insertions, 0 deletions

diff --git a/meap/meap-code/ch2/ch2-sensor-emulator.rs b/meap/meap-code/ch2/ch2-sensor-emulator.rs
new file mode 100644
index 0000000..afdc893
--- /dev/null
+++ b/meap/meap-code/ch2/ch2-sensor-emulator.rs
@@ -0,0 +1,36 @@
+use std::time;

+use std::f64::consts::PI;

+use std::thread;

+

+fn main() {

+    let mut sensor_array_state: f64 = 1.0;

+

+    for step in 1.. {

+        pause(step);

+        let reading = take_reading(sensor_array_state);

+        print_reading(reading);

+        sensor_array_state += 0.05;

+    }

+}

+

+fn pause(step: usize) {

+  let delay_ms = if step % 4 == 0 {

+      500

+  } else if step % 7 == 0 {

+      1000

+  } else {

+      3

+  };

+

+  let delay = time::Duration::from_millis(delay_ms);

+  thread::sleep(delay);

+}

+

+fn take_reading(x: f64) -> f64 {

+  // sin(x) + sin(π / sin(πx))

+  x.sin()   + (PI / (x*PI).sin()).sin()

+}

+

+fn print_reading(reading: f64) {

+  println!("{}", reading);

+}