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authorAdam Carpenter <adam.carpenter@adp.com>2019-02-11 16:59:01 -0500
committerAdam Carpenter <adam.carpenter@adp.com>2019-02-11 16:59:01 -0500
commitef1bf4921ee4127d461eec03a14c9070d193345c (patch)
treeab9f4ed73fcf97656743c959ce8c9adbe2ce9924 /ftoctof
downloadlearning-rust-ef1bf4921ee4127d461eec03a14c9070d193345c.tar.xz
learning-rust-ef1bf4921ee4127d461eec03a14c9070d193345c.zip
Init.
Diffstat (limited to 'ftoctof')
-rw-r--r--ftoctof/.gitignore2
-rw-r--r--ftoctof/Cargo.lock4
-rw-r--r--ftoctof/Cargo.toml7
-rw-r--r--ftoctof/src/main.rs43
4 files changed, 56 insertions, 0 deletions
diff --git a/ftoctof/.gitignore b/ftoctof/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/ftoctof/.gitignore
@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk
diff --git a/ftoctof/Cargo.lock b/ftoctof/Cargo.lock
new file mode 100644
index 0000000..e716471
--- /dev/null
+++ b/ftoctof/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ftoctof"
+version = "0.1.0"
+
diff --git a/ftoctof/Cargo.toml b/ftoctof/Cargo.toml
new file mode 100644
index 0000000..544eb2b
--- /dev/null
+++ b/ftoctof/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "ftoctof"
+version = "0.1.0"
+authors = ["Adam Carpenter <adam.carpenter@adp.com>"]
+edition = "2018"
+
+[dependencies]
diff --git a/ftoctof/src/main.rs b/ftoctof/src/main.rs
new file mode 100644
index 0000000..6425344
--- /dev/null
+++ b/ftoctof/src/main.rs
@@ -0,0 +1,43 @@
+use std::env;
+
+fn print_usage() {
+ eprintln!("error: usage: ftoctof [degrees] [f|c]");
+}
+
+fn main() {
+ // grab degrees value
+ let degrees: f32 = match env::args().nth(1) {
+ Some(s) => {
+ let attempt: f32 = s.trim().parse()
+ .expect("error: could not parse degrees");
+ attempt
+ },
+ None => {
+ print_usage();
+ return;
+ },
+ };
+
+ // grab scale identifier
+ let scale = match env::args().nth(2) {
+ Some(s) => s.to_lowercase(),
+ None => {
+ print_usage();
+ return;
+ },
+ };
+
+ // compute and print conversion
+ if scale == "f" {
+ let result: f32 = (degrees - 32.0) * 5.0 / 9.0;
+ println!("{} degrees fahrenheight is {} degrees celcius.", degrees, result);
+ }
+ else if scale == "c" {
+ let result: f32 = degrees * 9.0 / 5.0 + 32.0;
+ println!("{} degrees celcius is {} degrees fahrenheight.", degrees, result);
+ }
+ else {
+ print_usage();
+ }
+
+}