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  1. trait NsMn {
  2.     fn sssn(&self) -> i32; // 三捨四入
  3. }
  4. impl NsMn for f64 {
  5.     fn sssn(&self) -> i32 {
  6.         (self + self.signum() * 0.1).round() as i32
  7.     }
  8. }
  9. fn main() {
  10.     println!("{}\t{}", 1.3.sssn(), 1.4.sssn());
  11.     println!("{}\t{}", -1.3.sssn(), -1.4.sssn());
  12. }
  13.  
Success #stdin #stdout 0s 4480KB
comments (?)
stdin 
Standard input is empty
stdout 
1	2
-1	-2
https://ideone.com/Z6fTGh
language:
Rust (rust 1.56)
created:
5 years ago
visibility:
public

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