Another update from ingydotnet^djgoku

Task/Ackermann-function/Rust/ackermann-function-1.rust

@@ -1,15 +1,14 @@
- // works for Rust 0.9
-fn main() {
-	let a: int = ack(3, 4); // 125
-	println!("{}", a.to_str());
+fn ack(m: isize, n: isize) -> isize {
+    if m == 0 {
+        n + 1
+    } else if n == 0 {
+        ack(m - 1, 1)
+    } else {
+        ack(m - 1, ack(m, n - 1))
+    }
 }
 
-fn ack(m: int, n: int) -> int {
-	if m == 0 {
-		n + 1
-	} else if n == 0 {
-		ack(m - 1, 1)
-	} else {
-		ack(m - 1, ack(m, n - 1))
-	}
+fn main() {
+    let a = ack(3, 4);
+    println!("{}", a); // 125
 }