| macro_rules! prob1 { | |
| (0) => { | |
| 0 | |
| }; | |
| ($n:expr) => { | |
| if ($n % 3 == 0) || ($n % 5 == 0) { | |
| $n + prob1!($n - 1); //~ ERROR recursion limit reached while expanding the macro `prob1` | |
| } else { | |
| prob1!($n - 1); | |
| } | |
| }; | |
| } | |
| fn main() { | |
| println!("Problem 1: {}", prob1!(1000)); | |
| } |