38 lines
867 B
Rust
38 lines
867 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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fn f(x: isize) -> isize {
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// println!("in f:");
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println!("{}", x);
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if x == 1 {
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// println!("bottoming out");
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return 1;
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} else {
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// println!("recurring");
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let y: isize = x * f(x - 1);
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// println!("returned");
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println!("{}", y);
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return y;
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}
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}
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pub fn main() {
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assert_eq!(f(5), 120);
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// println!("all done");
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}
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