1 files changed, 27 insertions, 0 deletions
diff --git a/gcd.rs b/gcd.rs
new file mode 100644
index 0000000..9e73a44
--- /dev/null
+++ b/gcd.rs
@@ -0,0 +1,27 @@
+use std::env;
+
+fn gcd2(a: u64, b: u64) -> u64
+{
+  let mut a1 = a;
+  let mut b1 = b;
+
+  while b1 != 0 {
+    let c1 = b1;
+    b1 = a1 % b1;
+    a1 = c1;
+  }
+
+  a1
+}
+
+
+fn main ()
+{
+  // XXX skip(1) to skip program name:
+  let nums = env::args().skip(1).map(|s| s.parse().unwrap());
+
+  let gcd = nums.fold(0, |g, n| gcd2(g, n));
+
+  println!("{}", gcd);
+}
+